k8s笔记0528-基于KUBERNETES构建企业容器云手动部署集群记录-4

2023-08-24 10:26:46

部署kubelet

1.二进制包准备将软件包从linux-node1复制到linux-node2中去。

[root@linux-node1 ~]# cd /usr/local/src/kubernetes/server/bin/

[root@linux-node1 bin]# cp kubelet kube-proxy /opt/kubernetes/bin/

[root@linux-node1 bin]# scp kubelet kube-proxy 192.168.56.12:/opt/kubernetes/bin/

[root@linux-node1 bin]# scp kubelet kube-proxy 192.168.56.13:/opt/kubernetes/bin/

2.创建角色绑定

[root@linux-node1 ~]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

clusterrolebinding "kubelet-bootstrap" created

3.创建 kubelet bootstrapping kubeconfig 文件设置集群参数

[root@linux-node1 ~]# kubectl config set-cluster kubernetes \

   --certificate-authority=/opt/kubernetes/ssl/ca.pem \

   --embed-certs=true \

   --server=https://192.168.56.11:6443 \

   --kubeconfig=bootstrap.kubeconfig

Cluster "kubernetes" set.

设置客户端认证参数

[root@linux-node1 ~]# kubectl config set-credentials kubelet-bootstrap \

   --token=ad6d5bb607a186796d8861557df0d17f \

   --kubeconfig=bootstrap.kubeconfig

User "kubelet-bootstrap" set.

设置上下文参数

[root@linux-node1 ~]# kubectl config set-context default \

   --cluster=kubernetes \

   --user=kubelet-bootstrap \

   --kubeconfig=bootstrap.kubeconfig

Context "default" created.

选择默认上下文

[root@linux-node1 ~]# kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

Switched to context "default".

[root@linux-node1 kubernetes]# cp bootstrap.kubeconfig /opt/kubernetes/cfg

[root@linux-node1 kubernetes]# scp bootstrap.kubeconfig 192.168.56.12:/opt/kubernetes/cfg

[root@linux-node1 kubernetes]# scp bootstrap.kubeconfig 192.168.56.13:/opt/kubernetes/cfg

部署kubelet 1.设置CNI支持

[root@linux-node2 ~]# mkdir -p /etc/cni/net.d

[root@linux-node2 ~]# vim /etc/cni/net.d/10-default.conf

{

        "name": "flannel",

        "type": "flannel",

        "delegate": {

            "bridge": "docker0",

            "isDefaultGateway": true,

            "mtu": 1400

        }

}

2.创建kubelet目录

[root@linux-node2 ~]# mkdir /var/lib/kubelet

3.创建kubelet服务配置

[root@k8s-node2 ~]# vim /usr/lib/systemd/system/kubelet.service

[Unit]

Description=Kubernetes Kubelet

Documentation=https://github.com/GoogleCloudPlatform/kubernetes

After=docker.service

Requires=docker.service

[Service]

WorkingDirectory=/var/lib/kubelet

ExecStart=/opt/kubernetes/bin/kubelet \

  --address=192.168.56.12 \

  --hostname-override=192.168.56.12 \

  --pod-infra-container-image=mirrorgooglecontainers/pause-amd64:3.0 \

  --experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \

  --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \

  --cert-dir=/opt/kubernetes/ssl \

  --network-plugin=cni \

  --cni-conf-dir=/etc/cni/net.d \

  --cni-bin-dir=/opt/kubernetes/bin/cni \

  --cluster-dns=10.1.0.2 \

  --cluster-domain=cluster.local. \

  --hairpin-mode hairpin-veth \

  --allow-privileged=true \

  --fail-swap-on=false \

  --logtostderr=true \

  --v=2 \

  --logtostderr=false \

  --log-dir=/opt/kubernetes/log

Restart=on-failure

RestartSec=5

4.启动Kubelet

[root@linux-node2 ~]# systemctl daemon-reload

[root@linux-node2 ~]# systemctl enable kubelet

[root@linux-node2 ~]# systemctl start kubelet

5.查看服务状态

[root@linux-node2 kubernetes]# systemctl status kubelet

6.查看csr请求注意是在linux-node1上执行。

[root@linux-node1 ~]# kubectl get csr

NAME                                                   AGE       REQUESTOR           CONDITION

node-csr-0_w5F1FM_la_SeGiu3Y5xELRpYUjjT2icIFk9gO9KOU   1m        kubelet-bootstrap   Pending

7.批准kubelet 的 TLS 证书请求

[root@linux-node1 ~]# kubectl get csr|grep 'Pending' | awk 'NR>0{print $1}'| xargs kubectl certificate approve

执行完毕后，查看节点状态已经是Ready的状态了 [root@linux-node1 ssl]# kubectl get node NAME STATUS ROLES AGE VERSION

部署Kubernetes Proxy

1.配置kube-proxy使用LVS

[root@linux-node2 ~]# yum install -y ipvsadm ipset conntrack

2.创建 kube-proxy 证书请求

[root@linux-node1 ~]# cd /usr/local/src/ssl/

[root@linux-node1 ~]# vim kube-proxy-csr.json

{

  "CN": "system:kube-proxy",

  "hosts": [],

  "key": {

    "algo": "rsa",

    "size": 2048

  },

  "names": [

    {

      "C": "CN",

      "ST": "BeiJing",

      "L": "BeiJing",

      "O": "k8s",

      "OU": "System"

    }

  ]

}

3.生成证书

[root@linux-node1~]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \

   -ca-key=/opt/kubernetes/ssl/ca-key.pem \

   -config=/opt/kubernetes/ssl/ca-config.json \

   -profile=kubernetes  kube-proxy-csr.json | cfssljson -bare kube-proxy

4.分发证书到所有Node节点

[root@linux-node1 ssl]# cp kube-proxy*.pem /opt/kubernetes/ssl/

[root@linux-node1 ssl]# scp kube-proxy*.pem 192.168.56.12:/opt/kubernetes/ssl/

[root@linux-node1 ssl]# scp kube-proxy*.pem 192.168.56.12:/opt/kubernetes/ssl/

5.创建kube-proxy配置文件

[root@linux-node2 ~]# kubectl config set-cluster kubernetes \

   --certificate-authority=/opt/kubernetes/ssl/ca.pem \

   --embed-certs=true \

   --server=https://192.168.56.11:6443 \

   --kubeconfig=kube-proxy.kubeconfig

Cluster "kubernetes" set.

[root@linux-node2 ~]# kubectl config set-credentials kube-proxy \

   --client-certificate=/opt/kubernetes/ssl/kube-proxy.pem \

   --client-key=/opt/kubernetes/ssl/kube-proxy-key.pem \

   --embed-certs=true \

   --kubeconfig=kube-proxy.kubeconfig

User "kube-proxy" set.

[root@linux-node2 ~]# kubectl config set-context default \

   --cluster=kubernetes \

   --user=kube-proxy \

   --kubeconfig=kube-proxy.kubeconfig

Context "default" created.

[root@linux-node2 ~]# kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

Switched to context "default".

6.分发kubeconfig配置文件

[root@linux-node1 ssl]# cp kube-proxy.kubeconfig /opt/kubernetes/cfg/

[root@linux-node1 ~]# scp kube-proxy.kubeconfig 192.168.56.12:/opt/kubernetes/cfg/

[root@linux-node1 ~]# scp kube-proxy.kubeconfig 192.168.56.13:/opt/kubernetes/cfg/

7.创建kube-proxy服务配置

[root@linux-node2 bin]# mkdir /var/lib/kube-proxy

[root@k8s-node2 ~]# vim /usr/lib/systemd/system/kube-proxy.service

[Unit]

Description=Kubernetes Kube-Proxy Server

Documentation=https://github.com/GoogleCloudPlatform/kubernetes

After=network.target

[Service]

WorkingDirectory=/var/lib/kube-proxy

ExecStart=/opt/kubernetes/bin/kube-proxy \

  --bind-address=192.168.56.12 \

  --hostname-override=192.168.56.12 \

  --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig \

--masquerade-all \

  --feature-gates=SupportIPVSProxyMode=true \

  --proxy-mode=ipvs \

  --ipvs-min-sync-period=5s \

  --ipvs-sync-period=5s \

  --ipvs-scheduler=rr \

  --logtostderr=true \

  --v=2 \

  --logtostderr=false \

  --log-dir=/opt/kubernetes/log

Restart=on-failure

RestartSec=5

LimitNOFILE=65536

[Install]

WantedBy=multi-user.target

8.启动Kubernetes Proxy

[root@linux-node2 ~]# systemctl daemon-reload

[root@linux-node2 ~]# systemctl enable kube-proxy

[root@linux-node2 ~]# systemctl start kube-proxy

9.查看服务状态查看kube-proxy服务状态

[root@linux-node2 scripts]# systemctl status kube-proxy

检查LVS状态

[root@linux-node2 ~]# ipvsadm -L -n

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  10.1.0.1:443 rr persistent 10800

  -> 192.168.56.11:6443           Masq    1      0          0

如果你在两台实验机器都安装了kubelet和proxy服务，使用下面的命令可以检查状态：

[root@linux-node1 ssl]#  kubectl get node

NAME            STATUS    ROLES     AGE       VERSION

192.168.56.12   Ready     <none>    22m       v1.10.1

192.168.56.13   Ready     <none>    3m        v1.10.1

linux-node3节点请自行部署。

码农公寓

部署kubelet

部署Kubernetes Proxy

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