如果没有特殊指明,所有操作均在 zhaoyixin-k8s-01 节点上执行。
kubernetes master 节点运行如下组件:
- kube-apiserver
- kube-scheduler
- kube-controller-manager
这三个组件均以多实例模式运行:
- kube-scheduler 和 kube-controller-manager 会自动选举产生一个 leader 实例,其它实例处于阻塞模式,当 leader 挂了后,重新选举产生新的 leader,从而保证服务可用性;
- kube-apiserver 是无状态的,可以通过 kube-nginx 进行代理访问,从而保证服务可用性。
0.下载二进制文件
cd /opt/k8s/work
wget https://dl.k8s.io/v1.16.6/kubernetes-server-linux-amd64.tar.gz
tar -xzvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes
tar -xzvf kubernetes-src.tar.gz
将二进制文件拷贝到所有 master 节点:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kubernetes/server/bin/{apiextensions-apiserver,kube-apiserver,kube-controller-manager,kube-proxy,kube-scheduler,kubeadm,kubectl,kubelet,mounter} root@${node_ip}:/opt/k8s/bin/
ssh root@${node_ip} "chmod +x /opt/k8s/bin/*"
done
1.部署 kube-apiserver 集群
本节部署一个三实例 kube-apiserver 集群。
创建 kubernetes-master 证书和私钥
创建证书签名请求:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
cat > kubernetes-csr.json <
hosts
字段指定授权使用该证书的 IP 和域名列表,这里列出了 master 节点 IP、kubernetes 服务的 IP 和域名。
生成证书和私钥:
cfssl gencert -ca=/opt/k8s/work/ca.pem \
-ca-key=/opt/k8s/work/ca-key.pem \
-config=/opt/k8s/work/ca-config.json \
-profile=kubernetes kubernetes-csr.json | cfssljson -bare kubernetes
ls kubernetes*pem
将证书和私钥拷贝到所有 master 节点:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "mkdir -p /etc/kubernetes/cert"
scp kubernetes*.pem root@${node_ip}:/etc/kubernetes/cert/
done
创建加密配置文件
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
cat > encryption-config.yaml <
将加密配置文件拷贝到 master 节点:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp encryption-config.yaml root@${node_ip}:/etc/kubernetes/
done
创建审计策略文件
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
cat > audit-policy.yaml <
分发审计策略文件:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp audit-policy.yaml root@${node_ip}:/etc/kubernetes/audit-policy.yaml
done
创建访问 metrics-server 或 kube-prometheus 使用的证书
创建证书签名请求:
cd /opt/k8s/work
cat > proxy-client-csr.json <
- CN 名称需要位于
kube-apiserver
的--requestheader-allowed-names
参数中,否则后续访问 metrics 时会提示权限不足。
生成证书和私钥:
cfssl gencert -ca=/etc/kubernetes/cert/ca.pem \
-ca-key=/etc/kubernetes/cert/ca-key.pem \
-config=/etc/kubernetes/cert/ca-config.json \
-profile=kubernetes proxy-client-csr.json | cfssljson -bare proxy-client
ls proxy-client*.pem
拷贝生成的证书和私钥文件
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp proxy-client*.pem root@${node_ip}:/etc/kubernetes/cert/
done
创建 kube-apiserver systemd unit 模板文件
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
cat > kube-apiserver.service.template <
--advertise-address
:apiserver 对外通告的 IP(kubernetes 服务后端节点 IP);--default-*-toleration-seconds
:设置节点异常相关的阈值;--max-*-requests-inflight
:请求相关的最大阈值;--etcd-*
:访问 etcd 的证书和 etcd 服务器地址;--bind-address
: https 监听的 IP,不能为 127.0.0.1,否则外界不能访问它的安全端口 6443;--secret-port
:https 监听端口;--insecure-port=0
:关闭监听 http 非安全端口(8080);--tls-*-file
:指定 apiserver 使用的证书、私钥和 CA 文件;--audit-*
:配置审计策略和审计日志文件相关的参数;--client-ca-file
:验证 client (kue-controller-manager、kube-scheduler、kubelet、kube-proxy 等)请求所带的证书;--enable-bootstrap-token-auth
:启用 kubelet bootstrap 的 token 认证;--requestheader-*
:kube-apiserver 的 aggregator layer 相关的配置参数,proxy-client & HPA 需要使用;--requestheader-client-ca-file
:用于签名 --proxy-client-cert-file 和 --proxy-client-key-file 指定的证书;在启用了 metric aggregator 时使用;--requestheader-allowed-names
:不能为空,值为逗号分割的 --proxy-client-cert-file 证书的 CN 名称,这里设置为 "aggregator";--service-account-key-file
:签名 ServiceAccount Token 的公钥文件,kube-controller-manager 的 --service-account-private-key-file 指定私钥文件,两者配对使用;--runtime-config=api/all=true
: 启用所有版本的 APIs,如 autoscaling/v2alpha1;--authorization-mode=Node,RBAC
、--anonymous-auth=false
: 开启 Node 和 RBAC 授权模式,拒绝未授权的请求;--enable-admission-plugins
:启用一些默认关闭的 plugins;--allow-privileged
:运行执行 privileged 权限的容器;--apiserver-count=3
:指定 apiserver 实例的数量;--event-ttl
:指定 events 的保存时间;--kubelet-*
:如果指定,则使用 https 访问 kubelet APIs;需要为证书对应的用户(上面 kubernetes*.pem 证书的用户为 kubernetes) 用户定义 RBAC 规则,否则访问 kubelet API 时提示未授权;--proxy-client-*
:apiserver 访问 metrics-server 使用的证书;--service-cluster-ip-range
: 指定 Service Cluster IP 地址段;--service-node-port-range
: 指定 NodePort 的端口范围;
如果 kube-apiserver 机器没有运行 kube-proxy
,则还需要添加 --enable-aggregator-routing=true
参数;
1.
--requestheader-client-ca-file
指定的 CA 证书,必须具有client auth and server auth
2.如果--requestheader-allowed-names
不为空,且--proxy-client-cert-file
证书的 CN 名称不在 allowed-names 中,则后续查看 node 或 pods 的 metrics 失败
创建和分发 kube-apiserver systemd unit 文件
替换模板文件中的变量,为各节点生成 systemd unit 文件:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for (( i=0; i < 3; i++ ))
do
sed -e "s/##NODE_NAME##/${NODE_NAMES[i]}/" -e "s/##NODE_IP##/${NODE_IPS[i]}/" kube-apiserver.service.template > kube-apiserver-${NODE_IPS[i]}.service
done
ls kube-apiserver*.service
分发生成的 systemd unit 文件:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kube-apiserver-${node_ip}.service root@${node_ip}:/etc/systemd/system/kube-apiserver.service
done
启动并检查 kube-apiserver 服务
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "mkdir -p ${K8S_DIR}/kube-apiserver"
ssh root@${node_ip} "systemctl daemon-reload && systemctl enable kube-apiserver && systemctl restart kube-apiserver"
done
查看运行状态
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "systemctl status kube-apiserver |grep 'Active:'"
done
确保状态是active (running)
,否则通过journalctl -u kube-apiserver
查看日志,找出原因。
检查集群状态
$ kubectl cluster-info
Kubernetes master is running at https://192.168.16.8:6443
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
$ kubectl get all --all-namespaces
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default service/kubernetes ClusterIP 10.254.0.1 443/TCP 60s
$ kubectl get componentstatuses
NAME AGE
controller-manager
scheduler
etcd-0
etcd-2
etcd-1
检查 kube-apiserver 监听的端口
$ sudo netstat -lnpt|grep kube
tcp 0 0 192.168.16.8:6443 0.0.0.0:* LISTEN 13722/kube-apiserve
- 6443: 接收 https 请求的安全端口,对所有请求做认证和授权;
- 由于关闭了非安全端口,故没有监听 8080;
2.部署 kube-controller-manager 集群
本节部署一个三节点 kube-controller-manager 集群。
为保证通信安全,先生成 x509 证书和私钥,kube-controller-manager
在如下两种情况下使用该证书:
- 与 kube-apiserver 的安全端口通信;
- 在安全端口(https,10252) 输出 prometheus 格式的 metrics;
创建 kube-controller-manager 证书和私钥
创建证书签名请求:
cd /opt/k8s/work
cat > kube-controller-manager-csr.json <
- host列表包含所有 kube-controller-manager 节点IP;
- CN 和 O 均为
system:kube-controller-manager
,kubernetes 内置的 ClusterRoleBindingssystem:kube-controller-manager
赋予 kube-controller-manager 工作所需的权限。
生成证书和私钥:
cd /opt/k8s/work
cfssl gencert -ca=/opt/k8s/work/ca.pem \
-ca-key=/opt/k8s/work/ca-key.pem \
-config=/opt/k8s/work/ca-config.json \
-profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager
ls kube-controller-manager*pem
分发生成的证书和私钥
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kube-controller-manager*.pem root@${node_ip}:/etc/kubernetes/cert/
done
创建和分发 kubeconfig 文件
kube-controller-manager 使用 kubeconfig 文件访问 apiserver,该文件提供了 apiserver 地址、嵌入的 CA 证书和 kube-controller-manager 证书等信息:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/k8s/work/ca.pem \
--embed-certs=true \
--server="https://##NODE_IP##:6443" \
--kubeconfig=kube-controller-manager.kubeconfig
kubectl config set-credentials system:kube-controller-manager \
--client-certificate=kube-controller-manager.pem \
--client-key=kube-controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=kube-controller-manager.kubeconfig
kubectl config set-context system:kube-controller-manager \
--cluster=kubernetes \
--user=system:kube-controller-manager \
--kubeconfig=kube-controller-manager.kubeconfig
kubectl config use-context system:kube-controller-manager --kubeconfig=kube-controller-manager.kubeconfig
- kube-controller-manager 与 kube-apiserver 混布,故直接通过节点 IP 访问 kube-apiserver;
分发 kubeconfig
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
sed -e "s/##NODE_IP##/${node_ip}/" kube-controller-manager.kubeconfig > kube-controller-manager-${node_ip}.kubeconfig
scp kube-controller-manager-${node_ip}.kubeconfig root@${node_ip}:/etc/kubernetes/kube-controller-manager.kubeconfig
done
创建 kube-controller-manager systemd unit 模板文件
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
cat > kube-controller-manager.service.template <
--port=0
:关闭监听非安全端口(http),同时--address
参数无效,--bind-address
参数有效;--secure-port=10252
、--bind-address=0.0.0.0
: 在所有网络接口监听 10252 端口的 https /metrics 请求;--kubeconfig
:指定 kubeconfig 文件路径,kube-controller-manager 使用它连接和验证 kube-apiserver;--authentication-kubeconfig
和--authorization-kubeconfig
:kube-controller-manager 使用它连接 apiserver,对 client 的请求进行认证和授权。kube-controller-manager 不再使用--tls-ca-file
对请求 https metrics 的 Client 证书进行校验。如果没有配置这两个 kubeconfig 参数,则 client 连接 kube-controller-manager https 端口的请求会被拒绝(提示权限不足)。--cluster-signing-*-file
:签名 TLS Bootstrap 创建的证书;--experimental-cluster-signing-duration
:指定 TLS Bootstrap 证书的有效期;--root-ca-file
:放置到容器 ServiceAccount 中的 CA 证书,用来对 kube-apiserver 的证书进行校验;--service-account-private-key-file
:签名 ServiceAccount 中 Token 的私钥文件,必须和 kube-apiserver 的--service-account-key-file
指定的公钥文件配对使用;--service-cluster-ip-range
:指定 Service Cluster IP 网段,必须和 kube-apiserver 中的同名参数一致;--leader-elect=true
:集群运行模式,启用选举功能;被选为 leader 的节点负责处理工作,其它节点为阻塞状态;--controllers=*,bootstrapsigner,tokencleaner
:启用的控制器列表,tokencleaner 用于自动清理过期的 Bootstrap token;--horizontal-pod-autoscaler-*
:custom metrics 相关参数,支持 autoscaling/v2alpha1;--tls-cert-file
、--tls-private-key-file
:使用 https 输出 metrics 时使用的 Server 证书和秘钥;--use-service-account-credentials=true
: kube-controller-manager 中各 controller 使用 serviceaccount 访问 kube-apiserver;
创建和分发 kube-controller-mananger systemd unit 文件
替换模板文件中的变量,为各节点创建 systemd unit 文件:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for (( i=0; i < 3; i++ ))
do
sed -e "s/##NODE_NAME##/${NODE_NAMES[i]}/" -e "s/##NODE_IP##/${NODE_IPS[i]}/" kube-controller-manager.service.template > kube-controller-manager-${NODE_IPS[i]}.service
done
ls kube-controller-manager*.service
分发到所有 master 节点:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kube-controller-manager-${node_ip}.service root@${node_ip}:/etc/systemd/system/kube-controller-manager.service
done
启动并检查 kube-controller-manager 服务
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "mkdir -p ${K8S_DIR}/kube-controller-manager"
ssh root@${node_ip} "systemctl daemon-reload && systemctl enable kube-controller-manager && systemctl restart kube-controller-manager"
done
检查服务运行状态
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "systemctl status kube-controller-manager|grep Active"
done
确保状态为 active (running)
,否则通过journalctl -u kube-controller-manager
查看日志,找出原因。
kube-controller-manager 监听 10252 端口,接收 https 请求:
$ sudo netstat -lnpt | grep kube-cont
tcp 0 0 192.168.16.8:10252 0.0.0.0:* LISTEN 27533/kube-controll
查看 metrics 和 leader
$ curl -s --cacert /opt/k8s/work/ca.pem --cert /opt/k8s/work/admin.pem --key /opt/k8s/work/admin-key.pem https://172.27.138.251:10252/metrics |head
# HELP apiserver_audit_event_total [ALPHA] Counter of audit events generated and sent to the audit backend.
# TYPE apiserver_audit_event_total counter
apiserver_audit_event_total 0
# HELP apiserver_audit_requests_rejected_total [ALPHA] Counter of apiserver requests rejected due to an error in audit logging backend.
# TYPE apiserver_audit_requests_rejected_total counter
apiserver_audit_requests_rejected_total 0
# HELP apiserver_client_certificate_expiration_seconds [ALPHA] Distribution of the remaining lifetime on the certificate used to authenticate a request.
# TYPE apiserver_client_certificate_expiration_seconds histogram
apiserver_client_certificate_expiration_seconds_bucket{le="0"} 0
apiserver_client_certificate_expiration_seconds_bucket{le="1800"} 0
$ kubectl get endpoints kube-controller-manager --namespace=kube-system -o yaml
apiVersion: v1
kind: Endpoints
metadata:
annotations:
control-plane.alpha.kubernetes.io/leader: '{"holderIdentity":"zhaoyixin-k8s-01_4b717180-fdc3-42d1-8e9e-08d8bc0708b2","leaseDurationSeconds":15,"acquireTime":"2020-05-21T07:05:08Z","renewTime":"2020-05-21T07:06:29Z","leaderTransitions":0}'
creationTimestamp: "2020-05-21T07:05:08Z"
name: kube-controller-manager
namespace: kube-system
resourceVersion: "23373"
selfLink: /api/v1/namespaces/kube-system/endpoints/kube-controller-manager
uid: cdd98142-9541-4418-9e8f-c2f77c5009e6
可见,当前的 leader 为 zhaoyixin-k8s-01 节点。
3.部署 kube-scheduler 集群
本节部署一个三节点 kube-scheduler 集群。
为保证通信安全,本文档先生成 x509 证书和私钥,kube-scheduler
在如下两种情况下使用该证书:
- 与 kube-apiserver 的安全端口通信;
- 在安全端口(https,10251) 输出 prometheus 格式的 metrics;
创建 kube-scheduler 证书和私钥
创建证书签名请求:
cd /opt/k8s/work
cat > kube-scheduler-csr.json <
- hosts 列表包含所有 kube-scheduler 节点 IP;
- CN 和 O 均为
system:kube-scheduler
,kubernetes 内置的 ClusterRoleBindingssystem:kube-scheduler
将赋予 kube-scheduler 工作所需的权限;
生成证书和私钥:
cd /opt/k8s/work
cfssl gencert -ca=/opt/k8s/work/ca.pem \
-ca-key=/opt/k8s/work/ca-key.pem \
-config=/opt/k8s/work/ca-config.json \
-profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler
ls kube-scheduler*pem
分发证书和私钥
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kube-scheduler*.pem root@${node_ip}:/etc/kubernetes/cert/
done
创建和分发 kubeconfig 文件
kube-scheduler 使用 kubeconfig 文件访问 apiserver,该文件提供了 apiserver 地址、嵌入的 CA 证书和 kube-scheduler 证书:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/k8s/work/ca.pem \
--embed-certs=true \
--server="https://##NODE_IP##:6443" \
--kubeconfig=kube-scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
--client-certificate=kube-scheduler.pem \
--client-key=kube-scheduler-key.pem \
--embed-certs=true \
--kubeconfig=kube-scheduler.kubeconfig
kubectl config set-context system:kube-scheduler \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=kube-scheduler.kubeconfig
kubectl config use-context system:kube-scheduler --kubeconfig=kube-scheduler.kubeconfig
分发 kubeconfig 到所有 master 节点:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
sed -e "s/##NODE_IP##/${node_ip}/" kube-scheduler.kubeconfig > kube-scheduler-${node_ip}.kubeconfig
scp kube-scheduler-${node_ip}.kubeconfig root@${node_ip}:/etc/kubernetes/kube-scheduler.kubeconfig
done
创建 kube-scheduler 配置文件
cd /opt/k8s/work
cat >kube-scheduler.yaml.template <
--kubeconfig
:指定 kubeconfig 文件路径,kube-scheduler 使用它连接和验证 kube-apiserver;--leader-elect=true
:集群运行模式,启用选举功能;被选为 leader 的节点负责处理工作,其它节点为阻塞状态;
替换模板文件中的变量:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for (( i=0; i < 3; i++ ))
do
sed -e "s/##NODE_NAME##/${NODE_NAMES[i]}/" -e "s/##NODE_IP##/${NODE_IPS[i]}/" kube-scheduler.yaml.template > kube-scheduler-${NODE_IPS[i]}.yaml
done
ls kube-scheduler*.yaml
- NODE_NAMES 和 NODE_IPS 为相同长度的 bash 数组,分别为节点名称和对应的 IP;
分发 kube-scheduler 配置文件到所有 master 节点,并重名命名为 kube-scheduler.yaml。
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kube-scheduler-${node_ip}.yaml root@${node_ip}:/etc/kubernetes/kube-scheduler.yaml
done
创建 kube-scheduler systemd unit 模板文件
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
cat > kube-scheduler.service.template <
创建和分发 kube-scheduler systemd unit 文件
替换模板文件中的变量,为各节点创建 systemd unit 文件:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for (( i=0; i < 3; i++ ))
do
sed -e "s/##NODE_NAME##/${NODE_NAMES[i]}/" -e "s/##NODE_IP##/${NODE_IPS[i]}/" kube-scheduler.service.template > kube-scheduler-${NODE_IPS[i]}.service
done
ls kube-scheduler*.service
分发 systemd unit 文件到所有 master 节点:
cd /opt/k8s/work
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
scp kube-scheduler-${node_ip}.service root@${node_ip}:/etc/systemd/system/kube-scheduler.service
done
启动并检查 kube-scheduler 服务
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "mkdir -p ${K8S_DIR}/kube-scheduler"
ssh root@${node_ip} "systemctl daemon-reload && systemctl enable kube-scheduler && systemctl restart kube-scheduler"
done
检查服务运行状态
source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
do
echo ">>> ${node_ip}"
ssh root@${node_ip} "systemctl status kube-scheduler|grep Active"
done
确保状态为 active (running)
,否则通过journalctl -u kube-scheduler
查看日志,找出原因。
查看 metrics 和 leader
kube-scheduler 监听 10251 和 10259 端口:
- 10251:接收 http 请求,非安全端口,不需要认证授权;
- 10259:接收 https 请求,安全端口,需要认证授权;
两个接口都对外提供 /metrics
和 /healthz
的访问。
$ sudo netstat -lnpt |grep kube-sch
tcp 0 0 192.168.16.8:10259 0.0.0.0:* LISTEN 3605/kube-scheduler
tcp 0 0 192.168.16.8:10251 0.0.0.0:* LISTEN 3605/kube-scheduler
$ curl -s http://192.168.16.8:10251/metrics |head
# HELP apiserver_audit_event_total [ALPHA] Counter of audit events generated and sent to the audit backend.
# TYPE apiserver_audit_event_total counter
apiserver_audit_event_total 0
# HELP apiserver_audit_requests_rejected_total [ALPHA] Counter of apiserver requests rejected due to an error in audit logging backend.
# TYPE apiserver_audit_requests_rejected_total counter
apiserver_audit_requests_rejected_total 0
# HELP apiserver_client_certificate_expiration_seconds [ALPHA] Distribution of the remaining lifetime on the certificate used to authenticate a request.
# TYPE apiserver_client_certificate_expiration_seconds histogram
apiserver_client_certificate_expiration_seconds_bucket{le="0"} 0
apiserver_client_certificate_expiration_seconds_bucket{le="1800"} 0
$ curl -s --cacert /opt/k8s/work/ca.pem --cert /opt/k8s/work/admin.pem --key /opt/k8s/work/admin-key.pem https://192.168.16.8:10259/metrics |head
# HELP apiserver_audit_event_total [ALPHA] Counter of audit events generated and sent to the audit backend.
# TYPE apiserver_audit_event_total counter
apiserver_audit_event_total 0
# HELP apiserver_audit_requests_rejected_total [ALPHA] Counter of apiserver requests rejected due to an error in audit logging backend.
# TYPE apiserver_audit_requests_rejected_total counter
apiserver_audit_requests_rejected_total 0
# HELP apiserver_client_certificate_expiration_seconds [ALPHA] Distribution of the remaining lifetime on the certificate used to authenticate a request.
# TYPE apiserver_client_certificate_expiration_seconds histogram
apiserver_client_certificate_expiration_seconds_bucket{le="0"} 0
apiserver_client_certificate_expiration_seconds_bucket{le="1800"} 0
查看当前的 leader
$ kubectl get endpoints kube-scheduler --namespace=kube-system -o yaml
apiVersion: v1
kind: Endpoints
metadata:
annotations:
control-plane.alpha.kubernetes.io/leader: '{"holderIdentity":"zhaoyixin-k8s-01_463d86ce-7c3f-478f-b03f-79282fd97565","leaseDurationSeconds":15,"acquireTime":"2020-05-29T03:23:30Z","renewTime":"2020-05-29T03:26:14Z","leaderTransitions":0}'
creationTimestamp: "2020-05-29T03:23:30Z"
name: kube-scheduler
namespace: kube-system
resourceVersion: "559017"
selfLink: /api/v1/namespaces/kube-system/endpoints/kube-scheduler
uid: 6ca6bd7b-b3ee-49bb-9efb-f180511022df
可见,当前的 leader 为 zhaoyixin-k8s-01 节点。
参考
opsnull/follow-me-install-kubernetes-cluster