前言

至少准备三台centos服务器，其中一台为master节点，两台work节点；centos系统版本为7.5或以上版本；我这里使用的是7.9，除此之外，还需要一些额外的条件

至少2核2G的配置(单核不行的，我试过了)

一、k8s环境准备

运行k8s的服务需要具备以下条件

必须是基于Debian和Red Hat的linux发行版以及一些不提供句管理的发行版，这些系统才提供通用指令
每台主机至少具备2G内存；2核CPU
最好关闭防火墙
节点中不能有重复的主机名、mac地址或product_uuid;

接下来，在所有的节点中配置和安装以下几项

1、每个系统都设置唯一的静态ip

用vi编辑器打开网卡配置/etc/sysconfig/network-scripts/ifcfg-ens33

# 将 BOOTPROTO 改为static
BOOTPROTO=static
# 添加ip、网关和DNS地址，网关可以通过命令：“netstat -rn” 查看
IPADDR=192.168.253.131
GATEWAY=192.168.253.2
DNS1=8.8.8.8

2、时间同步

k8s要求集群中的节点必须精确一致，所以直接使用chronyd从网络同步时间

# 启动chronyd服务
systemctl start chronyd
# 设为开机自启
systemctl enable chronyd
# 查看当前时间
date

3、重新设置主机名

在k8s中，主机名不能重复，所以将其设为不一样的节点

# 主节点
hostnamectl set-hostname master
# 工作节点1
hostnamectl set-hostname node1
# 工作节点2
hostnamectl set-hostname node2

4、设置hosts域名映射

在所有节点上执行以下命令，在hosts文件中添加一个指向主节点的域名，这里不要照抄，要将ip改成你自己的ip

# 在所有节点执行
echo "192.168.253.131 cluster-endpoint" >> /etc/hosts

在初始化的时候需要用到master，所以需要hosts加入以下配置，对应的主机名要和上面第三步的一样

# 以下操作只在主节点操作
echo "192.168.253.131 master" >> /etc/hosts
echo "192.168.253.132 node1" >> /etc/hosts
echo "192.168.253.133 node2" >> /etc/hosts

4、禁用SELINUX

SELinux或Security-Enhanced Linux是提供访问控制安全策略的机制或安全模块，简而言之，它是一项功能或服务，用于将用户限制为系统管理员设置的某些政策和规则。这里需要将SELINUX设为permissive 模式（相当于禁用）

# 临时禁用，重启后复原，也可以用 setenforce Permissive 命令，效果是一样的
setenforce 0
# 永久禁用，
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

5、关闭swap分区

swap分区是虚拟内存，Swap分区在系统的物理内存不够用的时候，把硬盘内存中的一部分空间释放出来，以供当前运行的程序使用,关闭虚拟内存可以提高k8s的性能；

#临时关闭swap分区, 重启失效;
swapoff -a
#永久关闭swap分区
sed -ri 's/.*swap.*/#&/' /etc/fstab

6、允许 iptable 检查桥接流量

网卡上可能有ipv6的流量，将ipv6的流量桥接到ipv4网卡上，方便统计；
将以下内容一起复制到命令行执行

cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

让以上配置生效

sudo sysctl --system

7、禁用iptables 和防火墙服务

k8s和docker在运行中会产生大量的iptables规则，为了不让系统规则跟它们混淆，直接关闭系统的规则

# 关闭iptables，没这个服务可忽略
systemctl stop iptables
systemctl disable iptables
# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld

8、配置ipvs功能

在Kubernetes中Service有两种带来模型，一种是基于iptables的，一种是基于ipvs的两者比较的话，ipvs的性能明显要高一些，但是如果要使用它，需要手动载入ipvs模块

1.安装ipset和ipvsadm

yum install ipset ipvsadmin -y

2.添加需要加载的模块写入脚本文件

cat <<EOF> /etc/sysconfig/modules/ipvs.modules
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF

3.为脚本添加执行权限

chmod +x /etc/sysconfig/modules/ipvs.modules

4.执行脚本文件

/bin/bash /etc/sysconfig/modules/ipvs.modules

5.查看对应的模块是否加载成功

lsmod | grep -e ip_vs -e nf_conntrack_ipv4

二、安装docker

首先，我们需要在每台服务器上都安装docker的运行环境；

1、卸载原docker

# 查看已安装的docker
yum list installed | grep docker
# 卸载docker相关组件
yum -y remove docker*
# 除了docker之外，也需要将containerd.io 卸载，这是容器相关的组件
docker -y remove containerd.io.x86_64
# 删除docker目录
rm -rf /var/lib/docker

2、使用国内的阿里云镜像仓

# 使用国内的阿里云镜像仓库-- 比较快 ，建议使用这个
 yum-config-manager \
    --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3、安装指定版本的docker

yum install \
 docker-ce-20.10.7 docker-ce-cli-20.10.7 containerd.io-1.4.6 -y

4、使用systemd代替cgroupfs、以及配置仓库镜像地址

docker在默认情况下使用Cgroup Driver 为cgroupfs，而k8s推荐使用systemd来代替cgroupfs，所以在/etc/docker/daemon.json内加入以下内容，如果没有这个文件，手动创建一个

{
  "registry-mirrors": ["https://q2hy3fzi.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"]
}

5、启动docker

# 第一种：启动docker
systemctl start docker
# 第二种：启动docker并设为开机启动
systemctl enable docker --now

三、安装k8s三大件

以下操作需要在所有的节点上进行

1、安装 kubelet 、kubeadm、 kubectl

如果使用k8s官网上的地址，将会导致下载很慢，所以这里建议使用阿里镜像安装

# 配置源
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

说明

enabled=1 ：开启
gpgcheck=0 ：是否开启gpg签名，1开启，0关闭
repo_gpgcheck=0 ：是否检查元数据信息文件的签名信息与完整性，1开启，0关闭

2、安装三大件

--disableexcludes=kubernetes表示排除禁用

yum install -y kubelet-1.20.9 kubeadm-1.20.9 kubectl-1.20.9 --disableexcludes=kubernetes

3、添加配置

在/etc/sysconfig/kubelet文件中加入以下内容

KUBELET_CGROUP_ARGS="--cgroup-driver=systemd"
KUBE_PROXY_MODE="ipvs"

说明

k8s也使用systemd来代替cgroupfs
k8s默认代理模式是iptables ，现改为ipvs，据说ipvs性能更高；也可以不设置

4、启动kubelet

# 开机自动启动
systemctl enable --now kubelet

四、使用kubeadm引导集群

理论上以下操作只需要在master节点进行

1、下载各个机器需要的集群

初始化主节点之前，需要先下载一些组件，但是这些组件都在官网上，所以我们国内是无法下载的，所以一我们将官网的镜像改成阿里云的镜像，以下命令执行后会在当前目录得到一个 images.sh 的脚本文件，执行后会在docker中下载一些需要的组件，==理论上这些只需要在主节点上执行，但是为了保险起见，我们在所有节点都安装一下==

sudo tee ./images.sh <<-'EOF'
#!/bin/bash
images=(
kube-apiserver:v1.20.9
kube-proxy:v1.20.9
kube-controller-manager:v1.20.9
kube-scheduler:v1.20.9
coredns:1.7.0
etcd:3.4.13-0
pause:3.2
)
for imageName in ${images[@]} ; do
docker pull registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/$imageName
done
EOF

设置可执行权限并执行脚本

chmod +x ./images.sh && ./images.sh

五、主节点环境准备

注意：以下的配置和安装是主节点才有的东西，所以只在master节点上进行，不要在work节点上操作；

1、初始化主节点

使用init组件快速初始化一个主节点

kubeadm init \
--apiserver-advertise-address=192.168.253.131 \
--control-plane-endpoint=cluster-endpoint \
--image-repository registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images \
--kubernetes-version v1.20.9 \
--service-cidr=10.96.0.0/16 \
--pod-network-cidr=192.168.0.0/16

说明

--apiserver-advertise-address ：api-server分发地址，这里一定要写主节点的ip地址
--control-plane-endpoint：控制端域名，这里写刚刚在hosts文件配置的主节点域名
--image-repository ：镜像仓库，使用国内镜像会快一些
--kubernetes-version ：版本号，跟着k8s的版本走就行，也可以自定义
--service-cidr ：service网络范围
--pod-network ： pod网络范围
--ignore-preflight-errors=all ：忽略检查错误，Kubernetes对GPU要求至少是2核，2G内存。如果你是只有1核的cpu或者只有1G内存的话就无法继续安装，all表示忽略所有检查；这样就算你的单核cpu也可以安装k8s，因为博主的云服务器是单核2G的，所以需要加上这个配置

安装过程需等待几分钟，如显示以下信息则表示安装成功，但是这还没完，如果要使用k8s集群，还需要按照下面的步骤继续执行命令；

Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
  export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/
You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:
  kubeadm join cluster-endpoint:6443 --token ppwpeo.286k19gvjdlelen8 \
    --discovery-token-ca-cert-hash sha256:1e402bf817b1f8f2ade7aeb0a702c389903a96e72724517409793e7b4904ee72 \
    --control-plane 
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join cluster-endpoint:6443 --token ppwpeo.286k19gvjdlelen8 \
    --discovery-token-ca-cert-hash sha256:1e402bf817b1f8f2ade7aeb0a702c389903a96e72724517409793e7b4904ee72

2、初始化后续

根据上面的提示继续进行配置，如果需要使用集群，还需要执行以下命令，
==记住，这里的命令是从第一步初始化成功后拷贝过来的命令，应该拷贝你的命令来执行==

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

3、work节点加入集群（安装令牌，==只在工作节点执行==)

如果要在集群中加入工作节点，那么需要在工作节点执行以下命令，这些是集群的令牌
==记住，这里的命令是从第一步初始化成功后拷贝过来的命令，应该拷贝你的命令来执行==

以下操作只在work节点执行即可

kubeadm join cluster-endpoint:6443 --token ppwpeo.286k19gvjdlelen8 \
    --discovery-token-ca-cert-hash sha256:1e402bf817b1f8f2ade7aeb0a702c389903a96e72724517409793e7b4904ee72

加入后我们在主节点执行kubectl get nodes命令，可以看到，除了主节点之外，还有2个工作节点，在看它们的状态都是NotReady(未准备好)的，因为还没安装网络插件，这刚好是我们下一步要做的事；

[root@master ~]# kubectl get nodes
NAME     STATUS     ROLES                  AGE    VERSION
master   NotReady   control-plane,master   4h5m   v1.20.9
node1    NotReady   <none>                 98m    v1.20.9
node2    NotReady   <none>                 7s     v1.20.9

需要注意的是，这个令牌是24小时内有效，超过24小时就要重新生成了；在master节点执行以下命令即可创建一个新的令牌

# 这个命令一定要在主节点执行才能生成令牌
kubeadm token create --print-join-command

4、安装pod网络插件(==只在主节点执行==)

以下操作只在master节点执行即可

网络插件有好几种，可以翻墙的童鞋可以通过官网下载配置进行安装：https://kubernetes.io/docs/concepts/cluster-administration/addons/；

在这里我们使用calico插件进行安装

# 下载 calico-etcd.yaml 到当前目录
wget https://docs.projectcalico.org/v3.10/manifests/calico.yaml
#因为是国外网站，考虑到有些童鞋无法访问，现将calico.yaml的文件内容放在结尾处，需要的童鞋自行复制到文件即可 
# 加载网络插件
kubectl apply -f calico-etcd.yaml

安装成功后，会显示以下信息表示安装完成

[root@master ~]# kubectl apply -f calico-etcd.yaml 
secret/calico-etcd-secrets configured
configmap/calico-config configured
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node unchanged
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers unchanged
poddisruptionbudget.policy/calico-kube-controllers created

再过几分钟，就可以看到所有的节点都已经ready了

[root@master ~]# kubectl get nodes
NAME     STATUS   ROLES                  AGE    VERSION
master   Ready    control-plane,master   5h5m   v1.20.9
node1    Ready    <none>                 158m   v1.20.9
node2    Ready    <none>                 59m    v1.20.9

六、自运行演示

k8s集群里面最厉害的一点就是自运行，也就是说当集群中的机器因为某些原因宕机了，重启之后它会自动运行起来，保证高可用，下面我们就来测试一下，输入以下命令重启三台服务器

reboot

过了几分钟后，我们发现k8s机器已经恢复好了，都是已就绪(Ready)状态，这就是自运行

[root@master ~]# kubectl get nodes
NAME     STATUS   ROLES                  AGE   VERSION
master   Ready    control-plane,master   15h   v1.20.9
node1    Ready    <none>                 13h   v1.20.9
node2    Ready    <none>                 11h   v1.20.9

七、创建一个nginx

执行以下命令即可(在master节点执行)

# 部署nginx，创建名为nginx的pob控制器
kubectl create deployment nginx --image=nginx:1.14-alpine
# 暴露端口
kubectl expose deployment nginx --port=80 --type=NodePort

执行后发现，容器正在创建中，ContainerCreating表示容器正在创建中

^C[root@master ~]# kubectl get pod
NAME                     READY   STATUS              RESTARTS   AGE
nginx-65c4bffcb6-q64cf   0/1     ContainerCreating   0          2m47s

在等个几分钟就创建好了，Running表示容器正在运行中

[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx-65c4bffcb6-q64cf   1/1     Running   0          7h44m

接下来看看映射的端口是哪一个，由下面的命令结果可以看到，端口号为30115；

[root@master ~]# kubectl get service
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP        27h
nginx        NodePort    10.96.149.130   <none>        80:30115/TCP   7h43m

因为我们的集群有三个，所以我们访问这三个ip + 端口都是可以访问nginx的

# 以下三个链接都能访问nignx
http://192.168.253.131:30115/
http://192.168.253.132:30115/
http://192.168.253.133:30115/

既然已经部署好了，又能访问，那么这个nginx部署到哪个节点上了呢？有2种方法可以看到

第一种、可以用describe指令看到

kubectl describe pod nginx-65c4bffcb6-q64cf
# 在最尾部可以看到`Events`的事件信息，带`#`号是博主加上去的注释内容
Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  # 拉取nginx镜像
  Normal  Pulling    33s   kubelet            Pulling image "nginx:1.14-alpine"
  # 已成功将 default/nginx-65c4bffcb6-q64cf 分配给节点node2 ，default是namespace，nginx-65c4bffcb6-q64cf 是pod
  Normal  Scheduled  51s   default-scheduler  Successfully assigned default/nginx-65c4bffcb6-q64cf to node2
  # nginx镜像拉取成功，拉取时长：25.96447344秒
  Normal  Pulled     2s    kubelet            Successfully pulled image "nginx:1.14-alpine" in 25.96447344s
  # 创建nginx的容器
  Normal  Created    50s   kubelet            Created container nginx
  # 运行nginx容器
  Normal  Started    50s   kubelet            Started container nginx

第二种、通过-o wide指令查看

kubectl get pod -o wide -n default

执行后结果如下，可以看到NODE那一栏就是节点的名称了

NAME                     READY   STATUS    RESTARTS   AGE     IP              NODE    NOMINATED NODE   READINESS GATES
nginx-65c4bffcb6-fdjhv   1/1     Running   0          4h53m   192.168.104.8   node2   <none>           <none>

完

整个安装过程比较简单，但是一步都不能错，只要前面错一步就会导致k8s集群运行过程中会出现各种各样的问题！

八、calico.yaml

此内容根据链接下载得来：wget https://docs.projectcalico.org/v3.10/manifests/calico.yaml;

---
# Source: calico/templates/calico-config.yaml
# This ConfigMap is used to configure a self-hosted Calico installation.
kind: ConfigMap
apiVersion: v1
metadata:
  name: calico-config
  namespace: kube-system
data:
  # Typha is disabled.
  typha_service_name: "none"
  # Configure the backend to use.
  calico_backend: "bird"
  # Configure the MTU to use
  veth_mtu: "1440"
  # The CNI network configuration to install on each node.  The special
  # values in this config will be automatically populated.
  cni_network_config: |-
    {
      "name": "k8s-pod-network",
      "cniVersion": "0.3.1",
      "plugins": [
        {
          "type": "calico",
          "log_level": "info",
          "datastore_type": "kubernetes",
          "nodename": "__KUBERNETES_NODE_NAME__",
          "mtu": __CNI_MTU__,
          "ipam": {
              "type": "calico-ipam"
          },
          "policy": {
              "type": "k8s"
          },
          "kubernetes": {
              "kubeconfig": "__KUBECONFIG_FILEPATH__"
          }
        },
        {
          "type": "portmap",
          "snat": true,
          "capabilities": {"portMappings": true}
        }
      ]
    }
---
# Source: calico/templates/kdd-crds.yaml
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: felixconfigurations.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: FelixConfiguration
    plural: felixconfigurations
    singular: felixconfiguration
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: ipamblocks.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: IPAMBlock
    plural: ipamblocks
    singular: ipamblock
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: blockaffinities.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: BlockAffinity
    plural: blockaffinities
    singular: blockaffinity
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: ipamhandles.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: IPAMHandle
    plural: ipamhandles
    singular: ipamhandle
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: ipamconfigs.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: IPAMConfig
    plural: ipamconfigs
    singular: ipamconfig
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: bgppeers.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: BGPPeer
    plural: bgppeers
    singular: bgppeer
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: bgpconfigurations.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: BGPConfiguration
    plural: bgpconfigurations
    singular: bgpconfiguration
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: ippools.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: IPPool
    plural: ippools
    singular: ippool
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: hostendpoints.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: HostEndpoint
    plural: hostendpoints
    singular: hostendpoint
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: clusterinformations.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: ClusterInformation
    plural: clusterinformations
    singular: clusterinformation
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: globalnetworkpolicies.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: GlobalNetworkPolicy
    plural: globalnetworkpolicies
    singular: globalnetworkpolicy
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: globalnetworksets.crd.projectcalico.org
spec:
  scope: Cluster
  group: crd.projectcalico.org
  version: v1
  names:
    kind: GlobalNetworkSet
    plural: globalnetworksets
    singular: globalnetworkset
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: networkpolicies.crd.projectcalico.org
spec:
  scope: Namespaced
  group: crd.projectcalico.org
  version: v1
  names:
    kind: NetworkPolicy
    plural: networkpolicies
    singular: networkpolicy
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: networksets.crd.projectcalico.org
spec:
  scope: Namespaced
  group: crd.projectcalico.org
  version: v1
  names:
    kind: NetworkSet
    plural: networksets
    singular: networkset
---
# Source: calico/templates/rbac.yaml
# Include a clusterrole for the kube-controllers component,
# and bind it to the calico-kube-controllers serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: calico-kube-controllers
rules:
  # Nodes are watched to monitor for deletions.
  - apiGroups: [""]
    resources:
      - nodes
    verbs:
      - watch
      - list
      - get
  # Pods are queried to check for existence.
  - apiGroups: [""]
    resources:
      - pods
    verbs:
      - get
  # IPAM resources are manipulated when nodes are deleted.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - ippools
    verbs:
      - list
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - blockaffinities
      - ipamblocks
      - ipamhandles
    verbs:
      - get
      - list
      - create
      - update
      - delete
  # Needs access to update clusterinformations.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - clusterinformations
    verbs:
      - get
      - create
      - update
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: calico-kube-controllers
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: calico-kube-controllers
subjects:
- kind: ServiceAccount
  name: calico-kube-controllers
  namespace: kube-system
---
# Include a clusterrole for the calico-node DaemonSet,
# and bind it to the calico-node serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: calico-node
rules:
  # The CNI plugin needs to get pods, nodes, and namespaces.
  - apiGroups: [""]
    resources:
      - pods
      - nodes
      - namespaces
    verbs:
      - get
  - apiGroups: [""]
    resources:
      - endpoints
      - services
    verbs:
      # Used to discover service IPs for advertisement.
      - watch
      - list
      # Used to discover Typhas.
      - get
  - apiGroups: [""]
    resources:
      - nodes/status
    verbs:
      # Needed for clearing NodeNetworkUnavailable flag.
      - patch
      # Calico stores some configuration information in node annotations.
      - update
  # Watch for changes to Kubernetes NetworkPolicies.
  - apiGroups: ["networking.k8s.io"]
    resources:
      - networkpolicies
    verbs:
      - watch
      - list
  # Used by Calico for policy information.
  - apiGroups: [""]
    resources:
      - pods
      - namespaces
      - serviceaccounts
    verbs:
      - list
      - watch
  # The CNI plugin patches pods/status.
  - apiGroups: [""]
    resources:
      - pods/status
    verbs:
      - patch
  # Calico monitors various CRDs for config.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - globalfelixconfigs
      - felixconfigurations
      - bgppeers
      - globalbgpconfigs
      - bgpconfigurations
      - ippools
      - ipamblocks
      - globalnetworkpolicies
      - globalnetworksets
      - networkpolicies
      - networksets
      - clusterinformations
      - hostendpoints
      - blockaffinities
    verbs:
      - get
      - list
      - watch
  # Calico must create and update some CRDs on startup.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - ippools
      - felixconfigurations
      - clusterinformations
    verbs:
      - create
      - update
  # Calico stores some configuration information on the node.
  - apiGroups: [""]
    resources:
      - nodes
    verbs:
      - get
      - list
      - watch
  # These permissions are only requried for upgrade from v2.6, and can
  # be removed after upgrade or on fresh installations.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - bgpconfigurations
      - bgppeers
    verbs:
      - create
      - update
  # These permissions are required for Calico CNI to perform IPAM allocations.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - blockaffinities
      - ipamblocks
      - ipamhandles
    verbs:
      - get
      - list
      - create
      - update
      - delete
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - ipamconfigs
    verbs:
      - get
  # Block affinities must also be watchable by confd for route aggregation.
  - apiGroups: ["crd.projectcalico.org"]
    resources:
      - blockaffinities
    verbs:
      - watch
  # The Calico IPAM migration needs to get daemonsets. These permissions can be
  # removed if not upgrading from an installation using host-local IPAM.
  - apiGroups: ["apps"]
    resources:
      - daemonsets
    verbs:
      - get
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: calico-node
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: calico-node
subjects:
- kind: ServiceAccount
  name: calico-node
  namespace: kube-system
---
# Source: calico/templates/calico-node.yaml
# This manifest installs the calico-node container, as well
# as the CNI plugins and network config on
# each master and worker node in a Kubernetes cluster.
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: calico-node
  namespace: kube-system
  labels:
    k8s-app: calico-node
spec:
  selector:
    matchLabels:
      k8s-app: calico-node
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
      labels:
        k8s-app: calico-node
      annotations:
        # This, along with the CriticalAddonsOnly toleration below,
        # marks the pod as a critical add-on, ensuring it gets
        # priority scheduling and that its resources are reserved
        # if it ever gets evicted.
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      nodeSelector:
        beta.kubernetes.io/os: linux
      hostNetwork: true
      tolerations:
        # Make sure calico-node gets scheduled on all nodes.
        - effect: NoSchedule
          operator: Exists
        # Mark the pod as a critical add-on for rescheduling.
        - key: CriticalAddonsOnly
          operator: Exists
        - effect: NoExecute
          operator: Exists
      serviceAccountName: calico-node
      # Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
      # deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
      terminationGracePeriodSeconds: 0
      priorityClassName: system-node-critical
      initContainers:
        # This container performs upgrade from host-local IPAM to calico-ipam.
        # It can be deleted if this is a fresh installation, or if you have already
        # upgraded to use calico-ipam.
        - name: upgrade-ipam
          image: calico/cni:v3.10.4
          command: ["/opt/cni/bin/calico-ipam", "-upgrade"]
          env:
            - name: KUBERNETES_NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: CALICO_NETWORKING_BACKEND
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: calico_backend
          volumeMounts:
            - mountPath: /var/lib/cni/networks
              name: host-local-net-dir
            - mountPath: /host/opt/cni/bin
              name: cni-bin-dir
        # This container installs the CNI binaries
        # and CNI network config file on each node.
        - name: install-cni
          image: calico/cni:v3.10.4
          command: ["/install-cni.sh"]
          env:
            # Name of the CNI config file to create.
            - name: CNI_CONF_NAME
              value: "10-calico.conflist"
            # The CNI network config to install on each node.
            - name: CNI_NETWORK_CONFIG
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: cni_network_config
            # Set the hostname based on the k8s node name.
            - name: KUBERNETES_NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            # CNI MTU Config variable
            - name: CNI_MTU
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: veth_mtu
            # Prevents the container from sleeping forever.
            - name: SLEEP
              value: "false"
          volumeMounts:
            - mountPath: /host/opt/cni/bin
              name: cni-bin-dir
            - mountPath: /host/etc/cni/net.d
              name: cni-net-dir
        # Adds a Flex Volume Driver that creates a per-pod Unix Domain Socket to allow Dikastes
        # to communicate with Felix over the Policy Sync API.
        - name: flexvol-driver
          image: calico/pod2daemon-flexvol:v3.10.4
          volumeMounts:
          - name: flexvol-driver-host
            mountPath: /host/driver
      containers:
        # Runs calico-node container on each Kubernetes node.  This
        # container programs network policy and routes on each
        # host.
        - name: calico-node
          image: calico/node:v3.10.4
          env:
            # Use Kubernetes API as the backing datastore.
            - name: DATASTORE_TYPE
              value: "kubernetes"
            # Wait for the datastore.
            - name: WAIT_FOR_DATASTORE
              value: "true"
            # Set based on the k8s node name.
            - name: NODENAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            # Choose the backend to use.
            - name: CALICO_NETWORKING_BACKEND
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: calico_backend
            # Cluster type to identify the deployment type
            - name: CLUSTER_TYPE
              value: "k8s,bgp"
            # Auto-detect the BGP IP address.
            - name: IP
              value: "autodetect"
            # Enable IPIP
            - name: CALICO_IPV4POOL_IPIP
              value: "Always"
            # Set MTU for tunnel device used if ipip is enabled
            - name: FELIX_IPINIPMTU
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: veth_mtu
            # The default IPv4 pool to create on startup if none exists. Pod IPs will be
            # chosen from this range. Changing this value after installation will have
            # no effect. This should fall within `--cluster-cidr`.
            - name: CALICO_IPV4POOL_CIDR
              value: "192.168.0.0/16"
            # Disable file logging so `kubectl logs` works.
            - name: CALICO_DISABLE_FILE_LOGGING
              value: "true"
            # Set Felix endpoint to host default action to ACCEPT.
            - name: FELIX_DEFAULTENDPOINTTOHOSTACTION
              value: "ACCEPT"
            # Disable IPv6 on Kubernetes.
            - name: FELIX_IPV6SUPPORT
              value: "false"
            # Set Felix logging to "info"
            - name: FELIX_LOGSEVERITYSCREEN
              value: "info"
            - name: FELIX_HEALTHENABLED
              value: "true"
          securityContext:
            privileged: true
          resources:
            requests:
              cpu: 250m
          livenessProbe:
            exec:
              command:
              - /bin/calico-node
              - -felix-live
              - -bird-live
            periodSeconds: 10
            initialDelaySeconds: 10
            failureThreshold: 6
          readinessProbe:
            exec:
              command:
              - /bin/calico-node
              - -felix-ready
              - -bird-ready
            periodSeconds: 10
          volumeMounts:
            - mountPath: /lib/modules
              name: lib-modules
              readOnly: true
            - mountPath: /run/xtables.lock
              name: xtables-lock
              readOnly: false
            - mountPath: /var/run/calico
              name: var-run-calico
              readOnly: false
            - mountPath: /var/lib/calico
              name: var-lib-calico
              readOnly: false
            - name: policysync
              mountPath: /var/run/nodeagent
      volumes:
        # Used by calico-node.
        - name: lib-modules
          hostPath:
            path: /lib/modules
        - name: var-run-calico
          hostPath:
            path: /var/run/calico
        - name: var-lib-calico
          hostPath:
            path: /var/lib/calico
        - name: xtables-lock
          hostPath:
            path: /run/xtables.lock
            type: FileOrCreate
        # Used to install CNI.
        - name: cni-bin-dir
          hostPath:
            path: /opt/cni/bin
        - name: cni-net-dir
          hostPath:
            path: /etc/cni/net.d
        # Mount in the directory for host-local IPAM allocations. This is
        # used when upgrading from host-local to calico-ipam, and can be removed
        # if not using the upgrade-ipam init container.
        - name: host-local-net-dir
          hostPath:
            path: /var/lib/cni/networks
        # Used to create per-pod Unix Domain Sockets
        - name: policysync
          hostPath:
            type: DirectoryOrCreate
            path: /var/run/nodeagent
        # Used to install Flex Volume Driver
        - name: flexvol-driver-host
          hostPath:
            type: DirectoryOrCreate
            path: /usr/libexec/kubernetes/kubelet-plugins/volume/exec/nodeagent~uds
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: calico-node
  namespace: kube-system
---
# Source: calico/templates/calico-kube-controllers.yaml
# See https://github.com/projectcalico/kube-controllers
apiVersion: apps/v1
kind: Deployment
metadata:
  name: calico-kube-controllers
  namespace: kube-system
  labels:
    k8s-app: calico-kube-controllers
spec:
  # The controllers can only have a single active instance.
  replicas: 1
  selector:
    matchLabels:
      k8s-app: calico-kube-controllers
  strategy:
    type: Recreate
  template:
    metadata:
      name: calico-kube-controllers
      namespace: kube-system
      labels:
        k8s-app: calico-kube-controllers
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      nodeSelector:
        beta.kubernetes.io/os: linux
      tolerations:
        # Mark the pod as a critical add-on for rescheduling.
        - key: CriticalAddonsOnly
          operator: Exists
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
      serviceAccountName: calico-kube-controllers
      priorityClassName: system-cluster-critical
      containers:
        - name: calico-kube-controllers
          image: calico/kube-controllers:v3.10.4
          env:
            # Choose which controllers to run.
            - name: ENABLED_CONTROLLERS
              value: node
            - name: DATASTORE_TYPE
              value: kubernetes
          readinessProbe:
            exec:
              command:
              - /usr/bin/check-status
              - -r
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: calico-kube-controllers
  namespace: kube-system
---
# Source: calico/templates/calico-etcd-secrets.yaml
---
# Source: calico/templates/calico-typha.yaml
---
# Source: calico/templates/configure-canal.yaml

centos7.9安装k8s

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