Centos7 安装部署Kubernetes(k8s)集群
目录
- https://projectcalico.docs.tigera.io/about/about-calico
搜索框里直接搜索calico.yaml
找到下载calico.yaml的命令
下载calico.yaml文件
[root@k8scloude1 ~]# curl https://docs.projectcalico.org/manifests/calico.yaml -O % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 212k 100 212k 0 0 44222 0 0:00:04 0:00:04 --:--:-- 55704 [root@k8scloude1 ~]# ls calico.yaml查看需要下载的calico镜像，这四个镜像需要在所有节点都下载，以k8scloude1为例
[root@k8scloude1 ~]# grep image calico.yaml image: docker.io/calico/cni:v3.21.2 image: docker.io/calico/cni:v3.21.2 image: docker.io/calico/pod2daemon-flexvol:v3.21.2 image: docker.io/calico/node:v3.21.2 image: docker.io/calico/kube-controllers:v3.21.2 [root@k8scloude1 ~]# docker pull docker.io/calico/cni:v3.21.2 v3.21.2: Pulling from calico/cni Digest: sha256:ce618d26e7976c40958ea92d40666946d5c997cd2f084b6a794916dc9e28061b Status: Image is up to date for calico/cni:v3.21.2 docker.io/calico/cni:v3.21.2 [root@k8scloude1 ~]# docker pull docker.io/calico/pod2daemon-flexvol:v3.21.2 v3.21.2: Pulling from calico/pod2daemon-flexvol Digest: sha256:b034c7c886e697735a5f24e52940d6d19e5f0cb5bf7caafd92ddbc7745cfd01e Status: Image is up to date for calico/pod2daemon-flexvol:v3.21.2 docker.io/calico/pod2daemon-flexvol:v3.21.2 [root@k8scloude1 ~]# docker pull docker.io/calico/node:v3.21.2 v3.21.2: Pulling from calico/node Digest: sha256:6912fe45eb85f166de65e2c56937ffb58c935187a84e794fe21e06de6322a4d0 Status: Image is up to date for calico/node:v3.21.2 docker.io/calico/node:v3.21.2 [root@k8scloude1 ~]# docker pull docker.io/calico/kube-controllers:v3.21.2 v3.21.2: Pulling from calico/kube-controllers d6a693444ed1: Pull complete a5399680e995: Pull complete 8f0eb4c2bcba: Pull complete 52fe18e41b06: Pull complete 2f8d3f9f1a40: Pull complete bc94a7e3e934: Pull complete 55bf7cf53020: Pull complete Digest: sha256:1f4fcdcd9d295342775977b574c3124530a4b8adf4782f3603a46272125f01bf Status: Downloaded newer image for calico/kube-controllers:v3.21.2 docker.io/calico/kube-controllers:v3.21.2 #主要是如下4个镜像 [root@k8scloude1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE calico/node v3.21.2 f1bca4d4ced2 4 weeks ago 214MB calico/pod2daemon-flexvol v3.21.2 7778dd57e506 5 weeks ago 21.3MB calico/cni v3.21.2 4c5c32530391 5 weeks ago 239MB calico/kube-controllers v3.21.2 b20652406028 5 weeks ago 132MB修改calico.yaml 文件，CALICO_IPV4POOL_CIDR的IP段要和kubeadm初始化时候的pod网段一致，注意格式要对齐，不然会报错
[root@k8scloude1 ~]# vim calico.yaml [root@k8scloude1 ~]# cat calico.yaml | egrep "CALICO_IPV4POOL_CIDR|"10.244"" - name: CALICO_IPV4POOL_CIDR value: "10.244.0.0/16"不直观的话看图片：修改calico.yaml 文件
应用calico.yaml文件
[root@k8scloude1 ~]# kubectl apply -f calico.yaml configmap/calico-config unchanged customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/caliconodestatuses.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/ipreservations.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org configured customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org configured clusterrole.rbac.authorization.k8s.io/calico-kube-controllers unchanged clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers unchanged clusterrole.rbac.authorization.k8s.io/calico-node unchanged clusterrolebinding.rbac.authorization.k8s.io/calico-node unchanged daemonset.apps/calico-node created serviceaccount/calico-node created deployment.apps/calico-kube-controllers created serviceaccount/calico-kube-controllers created Warning: policy/v1beta1 PodDisruptionBudget is deprecated in v1.21+, unavailable in v1.25+; use policy/v1 PodDisruptionBudget poddisruptionbudget.policy/calico-kube-controllers created此时发现三个节点都是Ready状态了
[root@k8scloude1 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8scloude1 Ready control-plane,master 53m v1.21.0 k8scloude2 Ready45m v1.21.0 k8scloude3 Ready 45m v1.21.0 4.8 配置kubectl命令tab键自动补全
查看kubectl自动补全命令
[root@k8scloude1 ~]# kubectl --help | grep bash completion Output shell completion code for the specified shell (bash or zsh)添加source <(kubectl completion bash)到/etc/profile，并使配置生效
[root@k8scloude1 ~]# cat /etc/profile | head -2 # /etc/profile source <(kubectl completion bash) [root@k8scloude1 ~]# source /etc/profile此时即可kubectl命令tab键自动补全
[root@k8scloude1 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8scloude1 Ready control-plane,master 59m v1.21.0 k8scloude2 Ready51m v1.21.0 k8scloude3 Ready 51m v1.21.0 #注意：需要bash-completion-2.1-6.el7.noarch包，不然不能自动补全命令 [root@k8scloude1 ~]# rpm -qa | grep bash bash-completion-2.1-6.el7.noarch bash-4.2.46-30.el7.x86_64 bash-doc-4.2.46-30.el7.x86_64 自此，Kubernetes(k8s)集群部署完毕！