一、安装前准备
etcd软件版本：etcd-v3.3.10-linux-amd64.tar.gz
系统:centos7.3
防火墙关闭
systemctl stop firewalld
systemctl disable firewalld
selinux关闭
配置/etc/hosts（三台操作）
192.168.159.121 k8s-master-01
192.168.159.122 k8s-node01
192.168.159.123 k8s-node02
配置时间同步
yum -y install ntpdate
crontab –e
#时间同步
*/5 * * * * /usr/sbin/ntpdate 0.asia.pool.ntp.org
二、配置免密钥登录（三台操作）
三台先操作
ssh-keygen
三台操作
ssh-copy-id -i /root/.ssh/id_rsa.pub root@k8s-node01
ssh-copy-id -i /root/.ssh/id_rsa.pub root@k8s-node02
ssh-copy-id -i /root/.ssh/id_rsa.pub root@k8s-master-01
三、安装etcd软件
三台创建目录
mkdir -p /app/etcd/{bin,cfg,ssl}
解压文件
tar zxvf etcd-v3.3.10-linux-amd64.tar.gz
cp etcd-v3.3.10-linux-amd64/{etcd,etcdctl} /app/etcd/bin/
scp /app/etcd/bin/* root@k8s-node01:/app/etcd/bin/
scp /app/etcd/bin/* root@k8s-node02:/appt/etcd/bin/
四、配置etcd tls
1、下载cfssl(三台操作)
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
2、生成证书
mkdir etcd-cert
cd etcd-cert
vi etcd-cert.sh
cat > ca-config.json <
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat > ca-csr.json <
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "zhejiang",
"ST": "hangzhou"
}
]
}
EOF
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
#-----------------------
cat > server-csr.json <
{
"CN": "etcd",
"hosts": [
"192.168.159.121",
"192.168.159.122",
"192.168.159.123"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "zhejiang",
"ST": "hangzhou"
}
]
}
EOF
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
执行脚本生成证书
sh etcd-cert.sh
把生成证书到三台/app/etcd/ssl/
cp ca.pem server-key.pem server.pem /app/etcd/ssl/
scp /app/etcd/ssl/* k8s-node01:/app/etcd/ssl/
scp /app/etcd/ssl/* k8s-node02:/app/etcd/ssl/
五、配置etcd加证书
1、k8s-master-01主机配置
配置
vi /app/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.159.121:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.159.121:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.159.121:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.159.121:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.159.121:2380,etcd02=https://192.168.159.122:2380,etcd03=https://192.168.159.123:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
配置etcd自动启动脚本
vi /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/app/etcd/cfg/etcd
ExecStart=/app/etcd/bin/etcd --name=${ETCD_NAME} --data-dir=${ETCD_DATA_DIR} --listen-peer-urls=${ETCD_LISTEN_PEER_URLS} --listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 --advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} --initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} --initial-cluster=${ETCD_INITIAL_CLUSTER} --initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} --initial-cluster-state=new --cert-file=/app/etcd/ssl/server.pem --key-file=/app/etcd/ssl/server-key.pem --peer-cert-file=/app/etcd/ssl/server.pem --peer-key-file=/app/etcd/ssl/server-key.pem --trusted-ca-file=/app/etcd/ssl/ca.pem --peer-trusted-ca-file=/app/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
2、配置k8s-node01主机配置
配置
vi /app/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.159.122:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.159.122:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.159.122:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.159.122:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.159.121:2380,etcd02=https://192.168.159.122:2380,etcd03=https://192.168.159.123:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
配置etcd自动启动脚本
vi /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/app/etcd/cfg/etcd
ExecStart=/app/etcd/bin/etcd --name=${ETCD_NAME} --data-dir=${ETCD_DATA_DIR} --listen-peer-urls=${ETCD_LISTEN_PEER_URLS} --listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 --advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} --initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} --initial-cluster=${ETCD_INITIAL_CLUSTER} --initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} --initial-cluster-state=new --cert-file=/app/etcd/ssl/server.pem --key-file=/app/etcd/ssl/server-key.pem --peer-cert-file=/app/etcd/ssl/server.pem --peer-key-file=/app/etcd/ssl/server-key.pem --trusted-ca-file=/app/etcd/ssl/ca.pem --peer-trusted-ca-file=/app/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
3、配置k8s-node02主机配置
配置
vi /app/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.159.123:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.159.123:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.159.123:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.159.123:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.159.121:2380,etcd02=https://192.168.159.122:2380,etcd03=https://192.168.159.123:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
配置etcd自动启动脚本
vi /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/app/etcd/cfg/etcd
ExecStart=/app/etcd/bin/etcd --name=${ETCD_NAME} --data-dir=${ETCD_DATA_DIR} --listen-peer-urls=${ETCD_LISTEN_PEER_URLS} --listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 --advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} --initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} --initial-cluster=${ETCD_INITIAL_CLUSTER} --initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} --initial-cluster-state=new --cert-file=/app/etcd/ssl/server.pem --key-file=/app/etcd/ssl/server-key.pem --peer-cert-file=/app/etcd/ssl/server.pem --peer-key-file=/app/etcd/ssl/server-key.pem --trusted-ca-file=/app/etcd/ssl/ca.pem --peer-trusted-ca-file=/app/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
启动etcd
systemctl daemon-reload
systemctl restart etcd
systemctl status etcd
systemctl enable etcd