docker相关操作
docker registry
docker run -d -p 5000:5000 --restart=always --name registry -v /opt/myregistry:/var/lib/registry registry
vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://gqk8w9va.mirror.aliyuncs.com"],
"graph":"/opt/mydocker",
"insecure-registries":["10.0.0.11:5000"]
}
{
"bip": "172.17.0.1/16",
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": ["https://fz5yth0r.mirror.aliyuncs.com"],
"insecure-registries": ["hub.docker.fenqi.d.xiaonei.com","registry.fenqi.d.xiaonei.com"],
"storage-driver": "overlay2",
"storage-opts": [
"overlay2.override_kernel_check=true"
],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m",
"max-file": "3"
}
}
docker hub
https://hub.docker.com
docker tag 10.0.0.11:5000/wuxingge/kubernetes-dashboard:v1.10.1 wuxingge/mydocker:kubernetes-dashboard-v1.10.1
docker login
docker push wuxingge/mydocker:kubernetes-dashboard-v1.10.1
docker pull wuxingge/mydocker:kubernetes-dashboard-v1.10.1
aliyun镜像仓库
docker tag registry.cn-beijing.aliyuncs.com/minminmsn/kubernetes-dashboard:v1.10.1 registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard:v1.10.1
docker login --username=dong1226032602 registry.cn-hangzhou.aliyuncs.com
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard:v1.10.1
二进制包下载
Client Binaries
https://dl.k8s.io/v1.13.1/kubernetes-client-linux-amd64.tar.gz
Server Binaries
https://dl.k8s.io/v1.13.1/kubernetes-server-linux-amd64.tar.gz
Node Binaries
https://dl.k8s.io/v1.13.1/kubernetes-node-linux-amd64.tar.gz
etcd
https://github.com/etcd-io/etcd/releases/download/v3.3.10/etcd-v3.3.10-linux-amd64.tar.gz
flannel
https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz
下载镜像
docker pull mirrorgooglecontainers/kube-apiserver-amd64:v1.12.2
docker pull mirrorgooglecontainers/kube-controller-amd64:v1.12.2
docker pull mirrorgooglecontainers/kube-controller-manager-amd64:v1.12.2
docker pull mirrorgooglecontainers/kube-controller-manager-amd64:v1.13.1
docker pull mirrorgooglecontainers/kube-controller-manager-amd64:v1.14.2
docker pull mirrorgooglecontainers/kube-scheduler-amd64:v1.12.2
docker pull mirrorgooglecontainers/kube-proxy-amd64:v1.12.2
docker pull mirrorgooglecontainers/pause:3.1
docker pull mirrorgooglecontainers/etcd-amd64:3.2.24
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.1
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.5.1
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.4.1
docker pull mirrorgooglecontainers/coredns:1.2.2
docker pull mirrorgooglecontainers/coredns-amd64:1.2.2
docker pull coredns/coredns:1.2.2
参考文档
https://github.com/minminmsn/k8s1.13
https://v1-13.docs.kubernetes.io/zh/docs/
二进制部署自此开始
角色划分
k8s-master1 10.0.0.11 k8s-master etcd、kube-apiserver、kube-controller-manager、kube-scheduler
k8s-node1 10.0.0.12 k8s-node etcd、kubelet、docker、kube_proxy
k8s-node2 10.0.0.13 k8s-node etcd、kubelet、docker、kube_proxy
hosts
10.0.0.11 k8s-master1
10.0.0.12 k8s-node1
10.0.0.13 k8s-node2
Master部署
4.1 下载软件
wget https://dl.k8s.io/v1.13.1/kubernetes-server-linux-amd64.tar.gz
wget https://dl.k8s.io/v1.13.1/kubernetes-client-linux-amd64.tar.gz
wget https://github.com/etcd-io/etcd/releases/download/v3.3.10/etcd-v3.3.10-linux-amd64.tar.gz
wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz
4.2 cfssl安装
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo
4.3 创建etcd证书
mkdir /k8s/etcd/{bin,cfg,ssl} -p
mkdir /k8s/kubernetes/{bin,cfg,ssl} -p
cd /k8s/etcd/ssl/
1）etcd ca配置
cat << EOF | tee ca-config.json
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"etcd": {
"expiry": "876000h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
2）etcd ca证书
cat << EOF | tee ca-csr.json
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
3）etcd server证书
cat << EOF | tee server-csr.json
{
"CN": "etcd",
"hosts": [
"10.0.0.11",
"10.0.0.12",
"10.0.0.13"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
4）生成etcd ca证书和私钥 初始化ca
[root@elasticsearch01 ssl]# ls
ca-config.json ca-csr.json server-csr.json
[root@elasticsearch01 ssl]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca
2018/12/26 16:13:54 [INFO] generating a new CA key and certificate from CSR
2018/12/26 16:13:54 [INFO] generate received request
2018/12/26 16:13:54 [INFO] received CSR
2018/12/26 16:13:54 [INFO] generating key: rsa-2048
2018/12/26 16:13:54 [INFO] encoded CSR
2018/12/26 16:13:54 [INFO] signed certificate with serial number 144752911121073185391033754516204538929473929443
[root@elasticsearch01 ssl]# ls
ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem server-csr.json
生成server证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=etcd server-csr.json | cfssljson -bare server
[root@elasticsearch01 ssl]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=etcd server-csr.json | cfssljson -bare server
2018/12/26 16:18:53 [INFO] generate received request
2018/12/26 16:18:53 [INFO] received CSR
2018/12/26 16:18:53 [INFO] generating key: rsa-2048
2018/12/26 16:18:54 [INFO] encoded CSR
2018/12/26 16:18:54 [INFO] signed certificate with serial number 388122587040599986639159163167557684970159030057
2018/12/26 16:18:54 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for websites.
For more information see the Baseline Requirements for the Issuance and Management of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@elasticsearch01 ssl]# ls
ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem server.csr server-csr.json server-key.pem server.pem
4.4 etcd安装(所有节点)
1）解压缩
tar xf etcd-v3.3.10-linux-amd64.tar.gz
cd etcd-v3.3.10-linux-amd64/
cp etcd etcdctl /k8s/etcd/bin/
2）配置etcd主文件
**etcd01:**
vim /k8s/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/data1/etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.11:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.11:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.11:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.11:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://10.0.0.11:2380,etcd02=https://10.0.0.12:2380,etcd03=https://10.0.0.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#[Security]
ETCD_CERT_FILE="/k8s/etcd/ssl/server.pem"
ETCD_KEY_FILE="/k8s/etcd/ssl/server-key.pem"
ETCD_TRUSTED_CA_FILE="/k8s/etcd/ssl/ca.pem"
ETCD_CLIENT_CERT_AUTH="true"
ETCD_PEER_CERT_FILE="/k8s/etcd/ssl/server.pem"
ETCD_PEER_KEY_FILE="/k8s/etcd/ssl/server-key.pem"
ETCD_PEER_TRUSTED_CA_FILE="/k8s/etcd/ssl/ca.pem"
ETCD_PEER_CLIENT_CERT_AUTH="true"
**etcd02:**
vim /k8s/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/data1/etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.12:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.12:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.12:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.12:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://10.0.0.11:2380,etcd02=https://10.0.0.12:2380,etcd03=https://10.0.0.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#[Security]
ETCD_CERT_FILE="/k8s/etcd/ssl/server.pem"
ETCD_KEY_FILE="/k8s/etcd/ssl/server-key.pem"
ETCD_TRUSTED_CA_FILE="/k8s/etcd/ssl/ca.pem"
ETCD_CLIENT_CERT_AUTH="true"
ETCD_PEER_CERT_FILE="/k8s/etcd/ssl/server.pem"
ETCD_PEER_KEY_FILE="/k8s/etcd/ssl/server-key.pem"
ETCD_PEER_TRUSTED_CA_FILE="/k8s/etcd/ssl/ca.pem"
ETCD_PEER_CLIENT_CERT_AUTH="true"
**etcd03:**
vim /k8s/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/data1/etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.13:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.13:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.13:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.13:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://10.0.0.11:2380,etcd02=https://10.0.0.12:2380,etcd03=https://10.0.0.13:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#[Security]
ETCD_CERT_FILE="/k8s/etcd/ssl/server.pem"
ETCD_KEY_FILE="/k8s/etcd/ssl/server-key.pem"
ETCD_TRUSTED_CA_FILE="/k8s/etcd/ssl/ca.pem"
ETCD_CLIENT_CERT_AUTH="true"
ETCD_PEER_CERT_FILE="/k8s/etcd/ssl/server.pem"
ETCD_PEER_KEY_FILE="/k8s/etcd/ssl/server-key.pem"
ETCD_PEER_TRUSTED_CA_FILE="/k8s/etcd/ssl/ca.pem"
ETCD_PEER_CLIENT_CERT_AUTH="true"
3）配置etcd启动文件
mkdir /data1/etcd -p
vim /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
WorkingDirectory=/data1/etcd/
EnvironmentFile=-/k8s/etcd/cfg/etcd.conf
# set GOMAXPROCS to number of processors
ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /k8s/etcd/bin/etcd --name=\"${ETCD_NAME}\" --data-dir=\"${ETCD_DATA_DIR}\" --listen-client-urls=\"${ETCD_LISTEN_CLIENT_URLS}\" --listen-peer-urls=\"${ETCD_LISTEN_PEER_URLS}\" --advertise-client-urls=\"${ETCD_ADVERTISE_CLIENT_URLS}\" --initial-cluster-token=\"${ETCD_INITIAL_CLUSTER_TOKEN}\" --initial-cluster=\"${ETCD_INITIAL_CLUSTER}\" --initial-cluster-state=\"${ETCD_INITIAL_CLUSTER_STATE}\" --cert-file=\"${ETCD_CERT_FILE}\" --key-file=\"${ETCD_KEY_FILE}\" --trusted-ca-file=\"${ETCD_TRUSTED_CA_FILE}\" --client-cert-auth=\"${ETCD_CLIENT_CERT_AUTH}\" --peer-cert-file=\"${ETCD_PEER_CERT_FILE}\" --peer-key-file=\"${ETCD_PEER_KEY_FILE}\" --peer-trusted-ca-file=\"${ETCD_PEER_TRUSTED_CA_FILE}\" --peer-client-cert-auth=\"${ETCD_PEER_CLIENT_CERT_AUTH}\""
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
4）启动 注意启动前etcd02、etcd03同样配置下
systemctl daemon-reload
systemctl enable etcd
systemctl start etcd
5）服务检查
/k8s/etcd/bin/etcdctl --ca-file=/k8s/etcd/ssl/ca.pem --cert-file=/k8s/etcd/ssl/server.pem --key-file=/k8s/etcd/ssl/server-key.pem --endpoints="https://10.0.0.11:2379,https://10.0.0.12:2379,https://10.0.0.13:2379" cluster-health
member c21df2258ce015e6 is healthy: got healthy result from https://10.0.0.13:2379
member d427109ed3caf9c3 is healthy: got healthy result from https://10.0.0.11:2379
member ec8c40660d3c1192 is healthy: got healthy result from https://10.0.0.12:2379
cluster is healthy
4.5 生成kubernets证书与私钥
1）制作kubernetes ca证书
cd /k8s/kubernetes/ssl
cat << EOF | tee ca-config.json
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"expiry": "876000h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat << EOF | tee ca-csr.json
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
[root@elasticsearch01 ssl]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2018/12/27 09:47:08 [INFO] generating a new CA key and certificate from CSR
2018/12/27 09:47:08 [INFO] generate received request
2018/12/27 09:47:08 [INFO] received CSR
2018/12/27 09:47:08 [INFO] generating key: rsa-2048
2018/12/27 09:47:08 [INFO] encoded CSR
2018/12/27 09:47:08 [INFO] signed certificate with serial number 156611735285008649323551446985295933852737436614
[root@elasticsearch01 ssl]# ls
ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem
2）制作apiserver证书
vim server-csr.json
{
"CN": "kubernetes",
"hosts": [
"10.254.0.1",
"127.0.0.1",
"10.0.0.11",
"10.0.0.12",
"10.0.0.13",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
[root@elasticsearch01 ssl]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
2018/12/27 09:51:56 [INFO] generate received request
2018/12/27 09:51:56 [INFO] received CSR
2018/12/27 09:51:56 [INFO] generating key: rsa-2048
2018/12/27 09:51:56 [INFO] encoded CSR
2018/12/27 09:51:56 [INFO] signed certificate with serial number 399376216731194654868387199081648887334508501005
2018/12/27 09:51:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@elasticsearch01 ssl]# ls
ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem server.csr server-csr.json server-key.pem server.pem
3）制作kube-proxy证书
cat << EOF | tee kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
[root@elasticsearch01 ssl]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
2018/12/27 09:52:40 [INFO] generate received request
2018/12/27 09:52:40 [INFO] received CSR
2018/12/27 09:52:40 [INFO] generating key: rsa-2048
2018/12/27 09:52:40 [INFO] encoded CSR
2018/12/27 09:52:40 [INFO] signed certificate with serial number 633932731787505365511506755558794469389165123417
2018/12/27 09:52:40 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@elasticsearch01 ssl]# ls
ca-config.json ca-csr.json ca.pem kube-proxy-csr.json kube-proxy.pem server-csr.json server.pem
ca.csr ca-key.pem kube-proxy.csr kube-proxy-key.pem server.csr server-key.pem
4.6部署kubernetes server
kubernetes master 节点运行如下组件： kube-apiserver kube-scheduler kube-controller-manager kube-scheduler 和 kube-controller-manager 可以以集群模式运行，通过 leader 选举产生一个工作进程，其它进程处于阻塞模式，master三节点高可用模式下可用
1）解压缩文件
tar xf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin/
cp kube-scheduler kube-apiserver kube-controller-manager kubectl /k8s/kubernetes/bin/
2）部署kube-apiserver组件 创建TLS Bootstrapping Token
[root@elasticsearch01 bin]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '
77325466834451c4ccfd01f5124025dd
vim /k8s/kubernetes/cfg/token.csv
77325466834451c4ccfd01f5124025dd,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
创建Apiserver配置文件
https://v1-13.docs.kubernetes.io/docs/reference/command-line-tools-reference/kube-apiserver/
vim /k8s/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://10.0.0.11:2379,https://10.0.0.12:2379,https://10.0.0.13:2379 \
--bind-address=10.0.0.11 \
--secure-port=6443 \
--advertise-address=10.0.0.11 \
--allow-privileged=true \
--service-cluster-ip-range=10.254.0.0/16 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/k8s/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/k8s/kubernetes/ssl/server.pem \
--tls-private-key-file=/k8s/kubernetes/ssl/server-key.pem \
--client-ca-file=/k8s/kubernetes/ssl/ca.pem \
--service-account-key-file=/k8s/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/k8s/etcd/ssl/ca.pem \
--etcd-certfile=/k8s/etcd/ssl/server.pem \
--etcd-keyfile=/k8s/etcd/ssl/server-key.pem"
创建apiserver systemd文件
vim /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-apiserver
ExecStart=/k8s/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
启动服务
systemctl daemon-reload
systemctl enable kube-apiserver
systemctl start kube-apiserver
[root@elasticsearch01 bin]# systemctl status kube-apiserver
● kube-apiserver.service - Kubernetes API Server
Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-12-27 14:41:22 CST; 20s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 22060 (kube-apiserver)
CGroup: /system.slice/kube-apiserver.service
└─22060 /k8s/kubernetes/bin/kube-apiserver --logtostderr=true --v=4 --etcd-servers=https://10.0.0.11:2379,https://10.2....
[root@elasticsearch01 bin]# ps -ef |grep kube-apiserver
root 22060 1 5 14:41 ? 00:00:14 /k8s/kubernetes/bin/kube-apiserver --logtostderr=true --v=4 --etcd-servers=https://10.0.0.11:2379,https://10.0.0.12:2379,https://10.0.0.13:2379 --bind-address=10.0.0.11 --secure-port=6443 --advertise-address=10.0.0.11 --allow-privileged=true --service-cluster-ip-range=10.254.0.0/16 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --enable-bootstrap-token-auth --token-auth-file=/k8s/kubernetes/cfg/token.csv --service-node-port-range=30000-50000 --tls-cert-file=/k8s/kubernetes/ssl/server.pem --tls-private-key-file=/k8s/kubernetes/ssl/server-key.pem --client-ca-file=/k8s/kubernetes/ssl/ca.pem --service-account-key-file=/k8s/kubernetes/ssl/ca-key.pem --etcd-cafile=/k8s/etcd/ssl/ca.pem --etcd-certfile=/k8s/etcd/ssl/server.pem --etcd-keyfile=/k8s/etcd/ssl/server-key.pem
[root@elasticsearch01 bin]# netstat -tulpn |grep kube-apiserve
tcp 0 0 10.0.0.11:6443 0.0.0.0:* LISTEN 22060/kube-apiserve
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 22060/kube-apiserve
3）部署kube-scheduler组件 创建kube-scheduler配置文件
https://v1-13.docs.kubernetes.io/docs/reference/command-line-tools-reference/kube-scheduler/
vim /k8s/kubernetes/cfg/kube-scheduler
KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect"
参数备注： --address：在 127.0.0.1:10251 端口接收 http /metrics 请求；kube-scheduler 目前还不支持接收 https 请求； --kubeconfig：指定 kubeconfig 文件路径，kube-scheduler 使用它连接和验证 kube-apiserver； --leader-elect=true：集群运行模式，启用选举功能；被选为 leader 的节点负责处理工作，其它节点为阻塞状态；
创建kube-scheduler systemd文件
vim /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-scheduler
ExecStart=/k8s/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
启动服务
systemctl daemon-reload
systemctl enable kube-scheduler.service
systemctl start kube-scheduler.service
[root@elasticsearch01 bin]# systemctl status kube-scheduler.service
● kube-scheduler.service - Kubernetes Scheduler
Loaded: loaded (/usr/lib/systemd/system/kube-scheduler.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-12-27 15:16:51 CST; 17s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 29026 (kube-scheduler)
CGroup: /system.slice/kube-scheduler.service
└─29026 /k8s/kubernetes/bin/kube-scheduler --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect
4）部署kube-controller-manager组件 创建kube-controller-manager配置文件
https://v1-13.docs.kubernetes.io/docs/reference/command-line-tools-reference/kube-controller-manager/
vim /k8s/kubernetes/cfg/kube-controller-manager
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect=true \
--address=127.0.0.1 \
--service-cluster-ip-range=10.254.0.0/16 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/k8s/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/k8s/kubernetes/ssl/ca-key.pem \
--root-ca-file=/k8s/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/k8s/kubernetes/ssl/ca-key.pem"
创建kube-controller-manager systemd文件
vim /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-controller-manager
ExecStart=/k8s/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
启动服务
systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl start kube-controller-manager
[root@elasticsearch01 bin]# systemctl status kube-controller-manager
● kube-controller-manager.service - Kubernetes Controller Manager
Loaded: loaded (/usr/lib/systemd/system/kube-controller-manager.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-12-27 15:19:19 CST; 11s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 29510 (kube-controller)
CGroup: /system.slice/kube-controller-manager.service
└─29510 /k8s/kubernetes/bin/kube-controller-manager --logtostderr=true --v=4 --master=127.0.0.1:8080 --l
4.7 验证kubeserver服务
设置环境变量
vim /etc/profile
export PATH=/k8s/kubernetes/bin:$PATH
source /etc/profile
查看master服务状态
kubectl get cs,nodes
[root@elasticsearch01 bin]# kubectl get cs,nodes
NAME STATUS MESSAGE ERROR
componentstatus/controller-manager Healthy ok
componentstatus/scheduler Healthy ok
componentstatus/etcd-0 Healthy {"health":"true"}
componentstatus/etcd-1 Healthy {"health":"true"}
componentstatus/etcd-2 Healthy {"health":"true"}
Node部署
kubernetes work 节点运行如下组件：
docker
kubelet
kube-proxy
flannel
系统环境
CentOS Linux release 7.4.1708 (Core)
Docker版本
Server Version: 18.09.0
Cgroup Driver: cgroupfs
5.1 Docker环境安装
yum install yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install docker-ce
systemctl start docker && systemctl enable docker
ExecStartPost=/usr/sbin/iptables -P FORWARD ACCEPT
5.2 部署kubelet组件
kublet 运行在每个 worker 节点上，接收 kube-apiserver 发送的请求，管理 Pod 容器，执行交互式命令，如exec、run、logs 等; kublet 启动时自动向 kube-apiserver 注册节点信息，内置的 cadvisor 统计和监控节点的资源使用情况; 为确保安全，只开启接收 https 请求的安全端口，对请求进行认证和授权，拒绝未授权的访问(如apiserver、heapster)
1）安装二进制文件
wget https://dl.k8s.io/v1.13.1/kubernetes-node-linux-amd64.tar.gz
tar xf kubernetes-node-linux-amd64.tar.gz
cd kubernetes/node/bin/
cp kube-proxy kubelet kubectl /k8s/kubernetes/bin/
2）复制相关证书到node节点
[root@elasticsearch01 ssl]# scp *.pem 10.0.0.12:$PWD
[email protected]'s password:
ca-key.pem 100% 1679 914.6KB/s 00:00
ca.pem 100% 1359 1.0MB/s 00:00
kube-proxy-key.pem 100% 1675 1.2MB/s 00:00
kube-proxy.pem 100% 1403 1.1MB/s 00:00
server-key.pem 100% 1679 809.1KB/s 00:00
server.pem
3）创建kubelet bootstrap kubeconfig文件 通过脚本实现
vim /k8s/kubernetes/cfg/environment.sh
#!/bin/bash
#创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=77325466834451c4ccfd01f5124025dd
KUBE_APISERVER="https://10.0.0.11:6443"
#设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=/k8s/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig
#设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=bootstrap.kubeconfig
# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet-bootstrap \
--kubeconfig=bootstrap.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
#----------------------
# 创建kube-proxy kubeconfig文件
kubectl config set-cluster kubernetes \
--certificate-authority=/k8s/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/k8s/kubernetes/ssl/kube-proxy.pem \
--client-key=/k8s/kubernetes/ssl/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
执行脚本
[root@elasticsearch02 cfg]# sh environment.sh
Cluster "kubernetes" set.
User "kubelet-bootstrap" set.
Context "default" created.
Switched to context "default".
Cluster "kubernetes" set.
User "kube-proxy" set.
Context "default" created.
Switched to context "default".
[root@elasticsearch02 cfg]# ls
bootstrap.kubeconfig environment.sh kube-proxy.kubeconfig
4）创建kubelet参数配置模板文件
10.0.0.12:
vim /k8s/kubernetes/cfg/kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 10.0.0.12
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["10.254.0.10"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
10.0.0.13:
vim /k8s/kubernetes/cfg/kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 10.0.0.13
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["10.254.0.10"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
5）创建kubelet配置文件
https://v1-13.docs.kubernetes.io/docs/reference/command-line-tools-reference/kubelet/
10.0.0.12
vim /k8s/kubernetes/cfg/kubelet
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=10.0.0.12 \
--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig \
--config=/k8s/kubernetes/cfg/kubelet.config \
--cert-dir=/k8s/kubernetes/ssl \
--pod-infra-container-image=10.0.0.11:5000/wuxingge/pause-amd64:3.0"
备用
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
10.0.0.13
vim /k8s/kubernetes/cfg/kubelet
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=10.0.0.13 \
--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig \
--config=/k8s/kubernetes/cfg/kubelet.config \
--cert-dir=/k8s/kubernetes/ssl \
--pod-infra-container-image=10.0.0.11:5000/wuxingge/pause-amd64:3.0"
6）创建kubelet systemd文件
vim /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service
[Service]
EnvironmentFile=/k8s/kubernetes/cfg/kubelet
ExecStart=/k8s/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
KillMode=process
[Install]
WantedBy=multi-user.target
7）将kubelet-bootstrap用户绑定到系统集群角色
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap
注意这个默认连接localhost:8080端口，可以在master上操作
[root@elasticsearch01 ssl]# kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper
--user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
8）启动服务
systemctl daemon-reload
systemctl enable kubelet
systemctl start kubelet
[root@elasticsearch02 cfg]# systemctl status kubelet
● kubelet.service - Kubernetes Kubelet
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-12-27 17:34:30 CST; 18s ago
Main PID: 24676 (kubelet)
Memory: 88.6M
CGroup: /system.slice/kubelet.service
└─24676 /k8s/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=10.0.0.11 --kubeconfig=/k8s/kuber
9）Master接受kubelet CSR请求 可以手动或自动 approve CSR 请求。推荐使用自动的方式，因为从 v1.8 版本开始，可以自动轮转approve csr 后生成的证书，如下是手动 approve CSR请求操作方法 查看CSR列表
[root@elasticsearch01 ssl]# kubectl get csr
NAME AGE REQUESTOR CONDITION
node-csr-gUwF0auDpLFC0lpBEGzsTs3dJbLC7OicX8wzKAlLQnI 49s kubelet-bootstrap Pending
接受node
[root@elasticsearch01 ssl]# kubectl certificate approve node-csr-gUwF0auDpLFC0lpBEGzsTs3dJbLC7OicX8wzKAlLQnI
certificatesigningrequest.certificates.k8s.io/node-csr-ij3py9j-yi-eoa8sOHMDs7VeTQtMv0N3Efj3ByZLMdc approved
再查看CSR
[root@elasticsearch01 ssl]# kubectl get csr
NAME AGE REQUESTOR CONDITION
node-csr-ij3py9j-yi-eoa8sOHMDs7VeTQtMv0N3Efj3ByZLMdc 5m13s kubelet-bootstrap Approved,Issued
5.3部署kube-proxy组件
kube-proxy 运行在所有 node节点上，它监听 apiserver 中 service 和 Endpoint 的变化情况，创建路由规则来进行服务负载均衡
1）创建 kube-proxy 配置文件
https://v1-13.docs.kubernetes.io/docs/reference/command-line-tools-reference/kube-proxy/
10.0.0.12:
vim /k8s/kubernetes/cfg/kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=10.0.0.12 \
--cluster-cidr=10.254.0.0/16 \
--kubeconfig=/k8s/kubernetes/cfg/kube-proxy.kubeconfig"
10.0.0.13:
vim /k8s/kubernetes/cfg/kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=10.0.0.13 \
--cluster-cidr=10.254.0.0/16 \
--kubeconfig=/k8s/kubernetes/cfg/kube-proxy.kubeconfig"
2）创建kube-proxy systemd文件
vim /usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-proxy
ExecStart=/k8s/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
=========================
test:
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
WorkingDirectory=/var/lib/kube-proxy
ExecStart=/usr/local/bin/kube-proxy
--bind-address=192.168.205.10
--v=4
--proxy-mode=ipvs
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
Restart=on-failure
[Install]
WantedBy=multi-user.target
========================
3）启动服务
systemctl daemon-reload
systemctl enable kube-proxy
systemctl start kube-proxy
[root@elasticsearch02 cfg]# systemctl status kube-proxy
● kube-proxy.service - Kubernetes Proxy
Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-12-27 18:31:42 CST; 11s ago
Main PID: 5376 (kube-proxy)
Memory: 40.9M
CGroup: /system.slice/kube-proxy.service
‣ 5376 /k8s/kubernetes/bin/kube-proxy --logtostderr=true --v=4 --hostname-override=10.0.0.11 --cluster-cidr=10.254.0.0/...
4）查看集群状态
[root@elasticsearch01 cfg]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
10.0.0.12 Ready 9m15s v1.13.1
5）同样操作部署node 10.0.0.13并认证csr，认证后会生成kubelet-client证书
注意期间要是kubelet，kube-proxy配置错误，比如监听IP或者hostname错误导致node not found，需要删除kubelet-client证书，重启kubelet服务，重启认证csr即可
[root@elasticsearch03 kubernetes]# ls ssl
ca-key.pem kubelet-client-2018-12-27-20-13-52.pem kubelet.crt kube-proxy-key.pem server-key.pem
ca.pem kubelet-client-current.pem kubelet.key kube-proxy.pem server.pem
[root@elasticsearch01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
10.0.0.13 Ready 13h v1.13.1
10.0.0.12 Ready 14h v1.13.1
Flanneld网络部署(所有节点)
默认没有flanneld网络，Node节点间的pod不能通信，只能Node内通信，为了部署步骤简洁明了，故flanneld放在后面安装 flannel服务需要先于docker启动。flannel服务启动时主要做了以下几步的工作： 从etcd中获取network的配置信息 划分subnet，并在etcd中进行注册 将子网信息记录到/run/flannel/subnet.env中
6.1 etcd注册网段
[root@elasticsearch02 cfg]# /k8s/etcd/bin/etcdctl --ca-file=/k8s/etcd/ssl/ca.pem --cert-file=/k8s/etcd/ssl/server.pem --key-file=/k8s/etcd/ssl/server-key.pem --endpoints="https://10.0.0.11:2379,https://10.0.0.12:2379,https://10.0.0.13:2379" set /k8s/network/config '{ "Network": "10.254.0.0/16", "Backend": {"Type": "vxlan"}}'
{ "Network": "10.254.0.0/16", "Backend": {"Type": "vxlan"}}
flanneld 当前版本 (v0.10.0) 不支持 etcd v3，故使用 etcd v2 API 写入配置 key 和网段数据； 写入的 Pod 网段 ${CLUSTER_CIDR} 必须是 /16 段地址，必须与 kube-controller-manager 的 --cluster-cidr 参数值一致；
6.2 flannel安装
1）解压安装
tar xf flannel-v0.10.0-linux-amd64.tar.gz
cp flanneld mk-docker-opts.sh /k8s/kubernetes/bin/
2）配置flanneld
vim /k8s/kubernetes/cfg/flanneld
FLANNEL_OPTIONS="--etcd-endpoints=https://10.0.0.11:2379,https://10.0.0.12:2379,https://10.0.0.13:2379 -etcd-cafile=/k8s/etcd/ssl/ca.pem -etcd-certfile=/k8s/etcd/ssl/server.pem -etcd-keyfile=/k8s/etcd/ssl/server-key.pem -etcd-prefix=/k8s/network"
scp /k8s/kubernetes/cfg/flanneld [email protected]:/k8s/kubernetes/cfg/
scp /k8s/kubernetes/cfg/flanneld [email protected]:/k8s/kubernetes/cfg/
创建flanneld systemd文件
vim /usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service
[Service]
Type=notify
EnvironmentFile=/k8s/kubernetes/cfg/flanneld
ExecStart=/k8s/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS
ExecStartPost=/k8s/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure
[Install]
WantedBy=multi-user.target
注意
mk-docker-opts.sh 脚本将分配给 flanneld 的 Pod 子网网段信息写入 /run/flannel/docker 文件，后续 docker 启动时 使用这个文件中的环境变量配置 docker0 网桥； flanneld 使用系统缺省路由所在的接口与其它节点通信，对于有多个网络接口（如内网和公网）的节点，可以用 -iface 参数指定通信接口; flanneld 运行时需要 root 权限；
scp /usr/lib/systemd/system/flanneld.service [email protected]:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/flanneld.service [email protected]:/usr/lib/systemd/system/
3）配置Docker启动指定子网 修改EnvironmentFile=/run/flannel/subnet.env，ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS即可
vim /usr/lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
scp /usr/lib/systemd/system/docker.service [email protected]:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/docker.service [email protected]:/usr/lib/systemd/system/
4）启动服务 注意启动flannel前要关闭docker及相关的kubelet这样flannel才会覆盖docker0网桥
systemctl daemon-reload
systemctl stop docker
systemctl start flanneld
systemctl enable flanneld
systemctl start docker
systemctl restart kubelet
systemctl restart kube-proxy
5）验证服务
[root@elasticsearch02 bin]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=10.254.35.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=10.254.35.1/24 --ip-masq=false --mtu=1450"
[root@elasticsearch02 bin]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: eth0: mtu 1500 qdisc mq state UP qlen 1000
link/ether 52:54:00:a4:ca:ff brd ff:ff:ff:ff:ff:ff
inet 10.0.0.12/24 brd 10.2.8.255 scope global eth0
valid_lft forever preferred_lft forever
3: docker0: mtu 1500 qdisc noqueue state DOWN
link/ether 02:42:06:0a:ab:32 brd ff:ff:ff:ff:ff:ff
inet 10.254.35.1/24 brd 10.254.35.255 scope global docker0
valid_lft forever preferred_lft forever
4: flannel.1: mtu 1450 qdisc noqueue state UNKNOWN
link/ether 72:59:dc:2b:0a:21 brd ff:ff:ff:ff:ff:ff
inet 10.254.35.0/32 scope global flannel.1
valid_lft forever preferred_lft forever
[root@elasticsearch01 k8s]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
10.0.0.13 Ready 16h v1.13.1
10.0.0.12 Ready 18h v1.13.1
kubectl 命令补全
echo "source <(kubectl completion bash)" >> /etc/profile
pod
vim nginx_pod.yml
apiVersion: v1
kind: Pod
metadata:
name: nginx
labels:
app: web
spec:
containers:
- name: nginx
image: 10.0.0.11:5000/wuxingge/nginx:latest
ports:
- containerPort: 80
kubectl create -f k8s_pod.yml
[root@k8s-master1 ~]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx 1/1 Running 0 8m36s 10.254.7.2 10.0.0.12
kubectl delete -f k8s_pod.yml
进入pod
kubectl exec -it -n blog wordpress-deploy-864874b89d-sk4hr /bin/bash
service
Service在Kubernetes是一个REST对象，类似于Pod。与所有REST对象一样，Service可以将定义POST到apiserver以创建新实例。
例如，假设您有一组Pods每个公开端口30000并带有标签"app=web"
vim nginx_service.yml
apiVersion: v1
kind: Service
metadata:
name: nginx
spec:
type: NodePort
ports:
- port: 80
nodePort: 30000
selector:
app: web
kubectl create -f k8s_service.yml
[root@k8s-master1 ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx 1/1 Running 0 3m8s 10.254.79.2 10.0.0.12
[root@k8s-master1 ~]# kubectl get service -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
kubernetes ClusterIP 10.254.0.1 443/TCP 6h
nginx NodePort 10.254.76.1 80:30000/TCP 23s app=web
kubectl delete -f k8s_service.yml
kubernetes-dashboard
https://kubernetes.io/docs/tasks/access-application-cluster/web-ui-dashboard/#deploying-the-dashboard-ui
https://github.com/kubernetes/kubernetes/tree/7f23a743e8c23ac6489340bbb34fa6f1d392db9d/cluster/addons/dashboard
https://github.com/kubernetes/dashboard
https://blog.csdn.net/nklinsirui/article/details/80581286
https://github.com/kubernetes/dashboard/issues/3472
自定义生成证书
[root@elasticsearch01 /]# mkdir /certs
[root@elasticsearch01 /]# openssl req -nodes -newkey rsa:2048 -keyout certs/dashboard.key -out certs/dashboard.csr -subj "/C=/ST=/L=/O=/OU=/CN=kubernetes-dashboard"
Generating a 2048 bit RSA private key
................+++
..............................................+++
writing new private key to 'certs/dashboard.key'
-----
No value provided for Subject Attribute C, skipped
No value provided for Subject Attribute ST, skipped
No value provided for Subject Attribute L, skipped
No value provided for Subject Attribute O, skipped
No value provided for Subject Attribute OU, skipped
[root@elasticsearch01 /]# ls /certs
dashboard.csr dashboard.key
[root@elasticsearch01 /]# openssl x509 -req -sha256 -days 365 -in certs/dashboard.csr -signkey certs/dashboard.key -out certs/dashboard.crt
Signature ok
subject=/CN=kubernetes-dashboard
Getting Private key
[root@elasticsearch01 /]# ls certs/
dashboard.crt dashboard.csr dashboard.key
[root@elasticsearch01 /]# kubectl create secret generic kubernetes-dashboard-certs --from-file=certs -n kube-system
secret/kubernetes-dashboard-certs created
修改service配置，将type: ClusterIP改成NodePort,便于通过Node端口访问
[root@elasticsearch01 /]# wget https://raw.githubusercontent.com/kubernetes/dashboard/master/aio/deploy/recommended/kubernetes-dashboard.yaml
[root@elasticsearch01 /]# vim /k8s/yaml/kubernetes-dashboard.yaml
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
type: NodePort
ports:
- port: 443
targetPort: 8443
selector:
k8s-app: kubernetes-dashboard
部署Kubernetes-dashboard
修改镜像地址为registry.cn-beijing.aliyuncs.com/minminmsn/kubernetes-dashboard:v1.10.1即可部署
[root@elasticsearch01 /]# vim /k8s/yaml/kubernetes-dashboard.yaml
spec:
containers:
- name: kubernetes-dashboard
image: registry.cn-beijing.aliyuncs.com/minminmsn/kubernetes-dashboard:v1.10.1
[root@elasticsearch01 /]# kubectl create -f /k8s/yaml/kubernetes-dashboard.yaml
serviceaccount/kubernetes-dashboard created
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
deployment.apps/kubernetes-dashboard created
service/kubernetes-dashboard created
Error from server (AlreadyExists): error when creating "/k8s/yaml/kubernetes-dashboard.yaml": secrets "kubernetes-dashboard-certs" already exists
[root@k8s-master1 yaml]# kubectl get pod -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kubernetes-dashboard-cb55bd5bd-xrrs8 1/1 Running 0 35m 10.254.87.2 10.0.0.13
[root@k8s-master1 yaml]# kubectl get svc -n kube-system -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
kubernetes-dashboard NodePort 10.254.207.120 443:31861/TCP 35m k8s-app=kubernetes-dashboard
访问dashboard
选择token访问，token获取方法如下
[root@elasticsearch01 ~]# cat /k8s/yaml/admin-token.yaml
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: admin
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
roleRef:
kind: ClusterRole
name: cluster-admin
apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
name: admin
namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
[root@elasticsearch01 yaml]# kubectl create -f admin-token.yaml
clusterrolebinding.rbac.authorization.k8s.io/admin created
serviceaccount/admin created
[root@k8s-master1 ~]# kubectl describe secret/$(kubectl get secret -nkube-system |grep admin|awk '{print $1}') -nkube-system
Name: admin-token-6qdlf
Namespace: kube-system
Labels:
Annotations: kubernetes.io/service-account.name: admin
kubernetes.io/service-account.uid: 8484d410-8509-11e9-adf0-000c29b4d624
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1359 bytes
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi10b2tlbi02cWRsZiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJhZG1pbiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6Ijg0ODRkNDEwLTg1MDktMTFlOS1hZGYwLTAwMGMyOWI0ZDYyNCIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbiJ9.Gb_T7kSzyPWh8bqcjCkfa7ND0I6yIlU9GbSK8qgFKktwyZ3_1G7i9tBIYk2FIGsqNJB9FiPx1DaKFz-h91pOGqA9RiGHdcABItKmcDSQcqCF7xw4OWRmgnT18HA_cweFRmywc24MuhN7scCp4jtpeFlaMN0ANC7NCG4b5ybiAJVvnFIKkiw6vbTgizBQX9qs2Op8miSHdoqzKU6ECcBMasDOGKu1jJuQVQJbTU9Zq_8o7jM7kdCoEOqu8ACye2W8P707LIR7pMD29cRnG3gf9-cCNxzf_yJMbB2YCX9V1VBpMFvIoIgvqN7GztTOrcawf5B_u2_VIHo27-g7EtgXRA
hosts解析
10.0.0.13 dashboard.wuxingge.com
https://dashboard.wuxingge.com:31861
部署coredns
修改部署文件环境变量
在官网下载https://github.com/coredns/deployment/tree/master/kubernetes 配置文件主要是deploy.sh和coredns.yam.sed，由于不是从kube-dns转到coredns，所以要注释掉kubectl相关操作，修改REVERSE_CIDRS、DNS_DOMAIN、CLUSTER_DNS_IP等变量为实际值，具体命令./deploy.sh -s -r 10.254.0.0/16 -i 10.254.0.10 -d clouster.local > coredns.yaml11
cd /coredns
./deploy.sh -s -r 10.254.0.0/16 -i 10.254.0.10 -d cluster.local > coredns.yaml
[root@k8s-master1 coredns]# diff coredns.yaml coredns.yaml.sed
59c59
< kubernetes cluster.local 10.254.0.0/16 {
---
> kubernetes CLUSTER_DOMAIN REVERSE_CIDRS {
62c62
< }
---
> }FEDERATIONS
64c64
< forward . /etc/resolv.conf
---
> forward . UPSTREAMNAMESERVER
69c69
< }
---
> }STUBDOMAINS
171c171
< clusterIP: 10.254.0.10
---
> clusterIP: CLUSTER_DNS_IP
部署coredns
[root@elasticsearch01 coredns]# kubectl create -f coredns.yaml
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
deployment.extensions/coredns created
service/kube-dns created
修改kubelet dns服务参数并重启kubelet服务
[root@elasticsearch02 ~]# tail /k8s/kubernetes/cfg/kubelet
--v=4
--hostname-override=10.2.8.65
--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig
--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig
--config=/k8s/kubernetes/cfg/kubelet.config
--cert-dir=/k8s/kubernetes/ssl
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0
*--cluster-dns=10.254.0.10 *
*--cluster-domain=cluster.local. *
--resolv-conf=/etc/resolv.conf "
[root@elasticsearch02 ~]# systemctl restart kubelet.service
[root@elasticsearch02 ~]# systemctl status kubelet.service
● kubelet.service - Kubernetes Kubelet
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2019-01-03 16:00:20 CST; 6s ago
Main PID: 31924 (kubelet)
Memory: 80.2M
CGroup: /system.slice/kubelet.service
└─31924 /k8s/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=10.2.8.65 --kubeconfig=/k8s/kubernetes...
使用busybox测试效果
注意：拿SVC服务来测试
[root@elasticsearch01 coredns]# kubectl run -it --rm --restart=Never --image=infoblox/dnstools:latest dnstools
If you don't see a command prompt, try pressing enter.
dnstools# nslookup kubernetes
Server: 10.254.0.10
Address: 10.254.0.10#53
Name: kubernetes.default.svc.cluster.local
Address: 10.254.0.1
dnstools# nslookup nginx
Server: 10.254.0.10
Address: 10.254.0.10#53
Name: nginx.default.svc.cluster.local
Address: 10.254.60.231
nginx 解析为 cluster-ip
[root@k8s-master1 ~]# kubectl get service -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
kubernetes ClusterIP 10.254.0.1 443/TCP 3d5h
nginx NodePort 10.254.60.231 80:30000/TCP 2m14s app=web
vim busybox.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
name: busybox
role: master
name: busybox
spec:
containers:
- name: busybox
image: myhub.fdccloud.com/library/busybox
command:
- sleep
- "3600"
kubectl create -f busybox.yaml
[root@k8s-master1 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 8s
[root@k8s-master1 ~]# kubectl exec -it busybox sh
/ #
/ #
/ #
/ # nslookup kubernetes
Server: 10.254.0.10
Address 1: 10.254.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.254.0.1 kubernetes.default.svc.cluster.local
/ # nslookup kubernetes.default.svc.cluster.local
Server: 10.254.0.10
Address 1: 10.254.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes.default.svc.cluster.local
Address 1: 10.254.0.1 kubernetes.default.svc.cluster.local
/ # nslookup nginx
Server: 10.254.0.10
Address 1: 10.254.0.10 kube-dns.kube-system.svc.cluster.local
Name: nginx
Address 1: 10.254.159.187 nginx.default.svc.cluster.local
附:
报错:
error: unable to upgrade connection: Forbidden (user=system:anonymous, verb=create, resource=nodes, subresource=proxy)
绑定一个cluster-admin的权限
kubectl create clusterrolebinding system:anonymous --clusterrole=cluster-admin --user=system:anonymous
批量删除已停止容器
docker rm `docker ps -a |awk '/Exited/{print $1}'`
部署wordpress
创建blog命名空间
kubectl create namespace blog
分步完成
第一步，创建一个MySQL的Deployment对象：(wordpress-db.yaml)
[root@k8s-master1 wordpress]# vim wordpress-db.yaml
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: mysql-deploy
namespace: blog
labels:
app: mysql
spec:
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
imagePullPolicy: IfNotPresent
ports:
- containerPort: 3306
name: dbport
env:
- name: MYSQL_ROOT_PASSWORD
value: rootPassW0rd
- name: MYSQL_DATABASE
value: wordpress
- name: MYSQL_USER
value: wordpress
- name: MYSQL_PASSWORD
value: wordpress
volumeMounts:
- name: db
mountPath: /var/lib/mysql
volumes:
- name: db
hostPath:
path: /var/lib/mysql
---
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: blog
spec:
selector:
app: mysql
ports:
- name: mysqlport
protocol: TCP
port: 3306
targetPort: dbport
kubectl create -f wordpress-db.yaml
[root@k8s-master1 wordpress]# kubectl describe svc mysql -n blog
Name: mysql
Namespace: blog
Labels:
Annotations:
Selector: app=mysql
Type: ClusterIP
IP: 10.254.251.65
Port: mysqlport 3306/TCP
TargetPort: dbport/TCP
Endpoints: 10.254.87.3:3306
Session Affinity: None
Events:
可以看到Endpoints部分匹配到了一个Pod，生成了一个clusterIP：10.254.251.65
，现在我们是不是就可以通过这个****clusterIP****加上定义的3306端口就可以正常访问我们这个****mysql****服务了
第二步. 创建Wordpress服务，将上面的wordpress的Pod转换成Deployment对象：（wordpress.yaml）
vim wordpress.yaml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: wordpress-deploy
namespace: blog
labels:
app: wordpress
spec:
template:
metadata:
labels:
app: wordpress
spec:
containers:
- name: wordpress
image: wordpress
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
name: wdport
env:
- name: WORDPRESS_DB_HOST
value: 10.254.251.65:3306
- name: WORDPRESS_DB_USER
value: wordpress
- name: WORDPRESS_DB_PASSWORD
value: wordpress
kubectl create -f wordpress.yaml
[root@k8s-master1 wordpress]# kubectl get pods -n blog
NAME READY STATUS RESTARTS AGE
mysql-deploy-99fb8596b-jrsr6 1/1 Running 0 9m12s
wordpress-deploy-77cd9f47b9-tsmwv 1/1 Running 0 47s
可以看到都已经是Running状态了，然后我们需要怎么来验证呢？是不是去访问下我们的wordpress服务就可以了，要访问，我们就需要建立一个能让外网用户访问的Service，前面我们学到过是不是NodePort类型的Service就可以？所以在上面的wordpress.yaml文件中添加上Service的信息：
---
apiVersion: v1
kind: Service
metadata:
name: wordpress
namespace: blog
spec:
type: NodePort
selector:
app: wordpress
ports:
- name: wordpressport
protocol: TCP
port: 80
targetPort: wdport
[root@k8s-master1 wordpress]# kubectl apply -f wordpress.yaml
Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
deployment.apps/wordpress-deploy configured
service/wordpress created
[root@k8s-master1 wordpress]# kubectl get pods -n blog -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mysql-deploy-99fb8596b-2b4mm 1/1 Running 0 41m 10.254.87.3 10.0.0.13
wordpress-deploy-864874b89d-sk4hr 1/1 Running 0 41m 10.254.79.4 10.0.0.12
[root@k8s-master1 wordpress]# kubectl get service -n blog -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
mysql ClusterIP 10.254.178.192 3306/TCP 41m app=mysql
wordpress NodePort 10.254.158.34 80:32255/TCP 41m app=wordpress
[root@k8s-master1 wordpress]# kubectl get deployments -n blog -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
mysql-deploy 1/1 1 1 42m mysql mysql:5.7 app=mysql
wordpress-deploy 1/1 1 1 42m wordpress wordpress app=wordpress
wordpress-deploy创建一个HPA对象，最小的 pod 副本数为1，最大为10，HPA会根据设定的 cpu使用率（10%）动态的增加或者减少pod数量
kubectl autoscale deployment wordpress-deploy --cpu-percent=10 --min=1 --max=10 -n blog
如果mysql服务被重新创建了的话，它的clusterIP非常有可能就变化了，所以上面我们环境变量中的WORDPRESS_DB_HOST的值就会有问题，就会导致访问不了数据库服务了，这个地方我们可以直接使用Service的名称来代替host，这样即使clusterIP变化了，也不会有任何影响
部署的应用整合到一个YAML文件中来：（wordpress-all.yaml）
[root@k8s-master1 wordpress]# cat wordpress-all.yaml
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: mysql-deploy
namespace: blog
labels:
app: mysql
spec:
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
ports:
- containerPort: 3306
name: dbport
env:
- name: MYSQL_ROOT_PASSWORD
value: rootPassW0rd
- name: MYSQL_DATABASE
value: wordpress
- name: MYSQL_USER
value: wordpress
- name: MYSQL_PASSWORD
value: wordpress
volumeMounts:
- name: db
mountPath: /var/lib/mysql
volumes:
- name: db
hostPath:
path: /var/lib/mysql
---
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: blog
spec:
selector:
app: mysql
ports:
- name: mysqlport
protocol: TCP
port: 3306
targetPort: dbport
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: wordpress-deploy
namespace: blog
labels:
app: wordpress
spec:
revisionHistoryLimit: 10
minReadySeconds: 5
strategy:
type: RollingUpdate
rollingUpdate:
maxSurge: 1
maxUnavailable: 1
template:
metadata:
labels:
app: wordpress
spec:
initContainers:
- name: init-db
image: busybox
command: ['sh', '-c', 'until nslookup mysql; do echo waiting for mysql service; sleep 2; done;']
containers:
- name: wordpress
image: wordpress
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
name: wdport
env:
- name: WORDPRESS_DB_HOST
value: mysql:3306
- name: WORDPRESS_DB_USER
value: wordpress
- name: WORDPRESS_DB_PASSWORD
value: wordpress
livenessProbe:
tcpSocket:
port: 80
initialDelaySeconds: 3
periodSeconds: 3
readinessProbe:
tcpSocket:
port: 80
initialDelaySeconds: 5
periodSeconds: 10
---
apiVersion: v1
kind: Service
metadata:
name: wordpress
namespace: blog
spec:
selector:
app: wordpress
type: NodePort
ports:
- name: wordpressport
protocol: TCP
port: 80
nodePort: 32255
targetPort: wdport
资源限制
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 100m
memory: 100Mi
查看pod详细信息
kubectl describe pod -n blog wordpress-deploy-864874b89d-sk4hr
wordpress持久化
https://v1-13.docs.kubernetes.io/docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/
准备nfs
yum -y install nfs-utils
[root@k8s-master1 ~]# cat /etc/exports
/data *(rw,no_root_squash,sync)
mkdir /data/{web,db} -p
chown -R nfsnobody.nfsnobody /data
chmod -R 777 /data
pv
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv0003
spec:
capacity:
storage: 5Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
storageClassName: slow
mountOptions:
- hard
- nfsvers=4.1
nfs:
path: /tmp
server: 172.17.0.2
[root@k8s-master ~]# vim wordpress_nfs_pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv1-nfs
namespace: blog
labels:
app: nfs1
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle
nfs:
server: 10.0.0.11
path: /data/web
pvc
vim wordpress_nfs_pvc.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: pvc1-nfs
namespace: blog
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 10Gi
selector:
matchLabels:
app: nfs1
wordpress-all
[root@k8s-master1 wordpress]# vim wordpress-all.yaml
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: mysql-deploy
namespace: blog
labels:
app: mysql
spec:
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
ports:
- containerPort: 3306
name: dbport
env:
- name: MYSQL_ROOT_PASSWORD
value: rootPassW0rd
- name: MYSQL_DATABASE
value: wordpress
- name: MYSQL_USER
value: wordpress
- name: MYSQL_PASSWORD
value: wordpress
volumeMounts:
- name: db
mountPath: /var/lib/mysql
volumes:
- name: db
hostPath:
path: /var/lib/mysql
---
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: blog
spec:
selector:
app: mysql
ports:
- name: mysqlport
protocol: TCP
port: 3306
targetPort: dbport
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: wordpress-deploy
namespace: blog
labels:
app: wordpress
spec:
replicas: 2
revisionHistoryLimit: 10
minReadySeconds: 5
strategy:
type: RollingUpdate
rollingUpdate:
maxSurge: 1
maxUnavailable: 1
template:
metadata:
labels:
app: wordpress
spec:
initContainers:
- name: init-db
image: busybox
command: ['sh', '-c', 'until nslookup mysql; do echo waiting for mysql service; sleep 2; done;']
containers:
- name: wordpress
image: wordpress
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
name: wdport
env:
- name: WORDPRESS_DB_HOST
value: mysql:3306
- name: WORDPRESS_DB_USER
value: wordpress
- name: WORDPRESS_DB_PASSWORD
value: wordpress
volumeMounts:
- name: www
mountPath: /var/www/html
livenessProbe:
tcpSocket:
port: 80
initialDelaySeconds: 3
periodSeconds: 3
readinessProbe:
tcpSocket:
port: 80
initialDelaySeconds: 5
periodSeconds: 10
volumes:
- name: www
persistentVolumeClaim:
claimName: pvc1-nfs
---
apiVersion: v1
kind: Service
metadata:
name: wordpress
namespace: blog
spec:
selector:
app: wordpress
type: NodePort
ports:
- name: wordpressport
protocol: TCP
port: 80
nodePort: 32255
targetPort: wdport
wordpress持久化-2
https://v1-13.docs.kubernetes.io/docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/
https://v1-13.docs.kubernetes.io/docs/concepts/workloads/controllers/deployment/
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.13/
部署MySQL
创建Secret对象
kubectl create secret generic mysql-pass [email protected]
kubectl get secrets
pv
[root@k8s-master1 wordpress]# vim mysql_nfs_pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv1-nfs
labels:
app: pv1-nfs
spec:
capacity:
storage: 20Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle
nfs:
server: 10.0.0.11
path: /data/db
pvc
[root@k8s-master1 wordpress]# vim mysql_nfs_pvc.yaml
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql-pv-claim
labels:
app: wordpress
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 20Gi
deployment_service
[root@k8s-master1 wordpress]# vim mysql-deployment.yaml
apiVersion: v1
kind: Service
metadata:
name: wordpress-mysql
labels:
app: wordpress
spec:
ports:
- port: 3306
selector:
app: wordpress
tier: mysql
clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: wordpress-mysql
labels:
app: wordpress
spec:
replicas: 2
selector:
matchLabels:
app: wordpress
tier: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: wordpress
tier: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-pass
key: password
ports:
- name: mysql
containerPort: 3306
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql
volumes:
- name: mysql-persistent-storage
persistentVolumeClaim:
claimName: mysql-pv-claim
官方MySQL镜像
/etc/mysql/mysql.conf.d/mysqld.cnf
部署wordpress
pv
[root@k8s-master1 wordpress]# vim wordpress_nfs_pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv2-nfs
labels:
app: pv2-nfs
spec:
capacity:
storage: 20Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle
nfs:
server: 10.0.0.11
path: /data/web
pvc
[root@k8s-master1 wordpress]# vim wordpress_nfs_pvc.yaml
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: wp-pv-claim
labels:
app: wordpress
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 20Gi
deployment_service
[root@k8s-master1 wordpress]# vim wordpress-deployment.yaml
apiVersion: v1
kind: Service
metadata:
name: wordpress
labels:
app: wordpress
spec:
ports:
- port: 80
selector:
app: wordpress
tier: frontend
type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: wordpress
labels:
app: wordpress
spec:
replicas: 2
selector:
matchLabels:
app: wordpress
tier: frontend
strategy:
type: Recreate
template:
metadata:
labels:
app: wordpress
tier: frontend
spec:
containers:
- name: wordpress
image: wordpress:4.8-apache
env:
- name: WORDPRESS_DB_HOST
value: wordpress-mysql
- name: WORDPRESS_DB_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-pass
key: password
ports:
- name: wordpress
containerPort: 80
volumeMounts:
- name: wordpress-persistent-storage
mountPath: /var/www/html
volumes:
- name: wordpress-persistent-storage
persistentVolumeClaim:
claimName: wp-pv-claim
[root@k8s-master1 wordpress]# cat wordpress-deployment.yaml
apiVersion: v1
kind: Service
metadata:
name: wordpress
labels:
app: wordpress
spec:
ports:
- name: wordpress
port: 80
nodePort: 30737
selector:
app: wordpress
tier: frontend
type: NodePort
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: wordpress
labels:
app: wordpress
spec:
replicas: 2
selector:
matchLabels:
app: wordpress
tier: frontend
strategy:
type: Recreate
template:
metadata:
labels:
app: wordpress
tier: frontend
spec:
containers:
- name: wordpress
image: wordpress:4.8-apache
env:
- name: WORDPRESS_DB_HOST
value: wordpress-mysql
- name: WORDPRESS_DB_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-pass
key: password
ports:
- name: wordpress
containerPort: 80
volumeMounts:
- name: wordpress-persistent-storage
mountPath: /var/www/html
volumes:
- name: wordpress-persistent-storage
persistentVolumeClaim:
claimName: wp-pv-claim
附
http://m.unixhot.com/kubernetes/kubernetes-kubeadm.html
https://console.cloud.google.com/gcr/images/google-containers/GLOBAL
docker pull mirrorgooglecontainers/kube-apiserver-amd64:v1.14.2
docker pull mirrorgooglecontainers/kube-controller-manager-amd64:v1.14.2
docker pull mirrorgooglecontainers/kube-scheduler-amd64:v1.14.2
docker pull mirrorgooglecontainers/kube-proxy-amd64:v1.14.2
docker pull mirrorgooglecontainers/pause:3.1
docker pull mirrorgooglecontainers/etcd-amd64:3.2.24
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.1
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.5.1
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.4.1
docker pull mirrorgooglecontainers/coredns-amd64:1.2.2
docker pull gcr.io/google_containers/kube-apiserver-amd64:v1.14.2
docker pull gcr.io/google_containers/kube-controller-manager-amd64:v1.14.2
docker pull gcr.io/google_containers/kube-scheduler-amd64:v1.14.2
docker pull gcr.io/google_containers/kube-proxy-amd64:v1.14.2
docker pull gcr.io/google_containers/pause:3.1
docker pull gcr.io/google_containers/etcd-amd64:3.2.24
docker pull gcr.io/google_containers/kubernetes-dashboard-amd64:v1.10.1
docker pull gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1
docker pull gcr.io/google_containers/kubernetes-dashboard-amd64:v1.4.1
docker pull gcr.io/google_containers/coredns:1.2.2
docker tag gcr.io/google_containers/kube-apiserver-amd64:v1.14.2 registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-apiserver-amd64:v1.14.2
docker tag gcr.io/google_containers/kube-controller-manager-amd64:v1.14.2 registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-controller-manager-amd64:v1.14.2
docker tag gcr.io/google_containers/kube-scheduler-amd64:v1.14.2 registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-scheduler-amd64:v1.14.2
docker tag gcr.io/google_containers/kube-proxy-amd64:v1.14.2 registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-proxy-amd64:v1.14.2
docker tag gcr.io/google_containers/pause:3.1 registry.cn-hangzhou.aliyuncs.com/wuxingge/pause:3.1
docker tag gcr.io/google_containers/etcd-amd64:3.2.24 registry.cn-hangzhou.aliyuncs.com/wuxingge/etcd-amd64:3.2.24
docker tag gcr.io/google_containers/kubernetes-dashboard-amd64:v1.10.1 registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard-amd64:v1.10.1
docker tag gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1 registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard-amd64:v1.5.1
docker tag gcr.io/google_containers/kubernetes-dashboard-amd64:v1.4.1 registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard-amd64:v1.4.1
docker tag gcr.io/google_containers/coredns:1.2.2 registry.cn-hangzhou.aliyuncs.com/wuxingge/coredns:1.2.2
docker login --username=dong1226032602 registry.cn-hangzhou.aliyuncs.com
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-apiserver-amd64:v1.14.2
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-controller-manager-amd64:v1.14.2
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-scheduler-amd64:v1.14.2
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kube-proxy-amd64:v1.14.2
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/pause:3.1
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/etcd-amd64:3.2.24
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard-amd64:v1.10.1
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard-amd64:v1.5.1
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/kubernetes-dashboard-amd64:v1.4.1
docker push registry.cn-hangzhou.aliyuncs.com/wuxingge/coredns:1.2.2