kubeadm 快速部署 k8s

k8s-master 初始化

• 配置 yum 源

[kubernetes]
name=kubernetes repo
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0

• yum 安装

yum install -y kubelet-1.14.0 kubeadm-1.14.0 kubectl-1.14.0 --disableexcludes=kubernetes

• 配置 kubeadm init yaml文件

kubeadm config print init-defaults > init.default.yaml
# 修改镜像地址
kubeadm config images pull --config=init.default.yaml

• 完整配置文件

apiVersion: kubeadm.k8s.io/v1beta1
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  # 配置本机地址
  advertiseAddress: 192.168.0.225
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  # 节点名称
  name: k8s-master
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta1
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneEndpoint: ""
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
#imageRepository: k8s.gcr.io
# 配置自定义镜像库
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.14.0
networking:
  dnsDomain: cluster.local
  # 配置 ip 池
  podSubnet: "192.168.0.0/16"
  serviceSubnet: 10.96.0.0/12
scheduler: {}

报错

ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables

echo "1" >/proc/sys/net/ipv4/ip_forward
echo "1" >/proc/sys/net/bridge/bridge-nf-call-iptables

其他命令

systemctl stop kubelet
docker stop $(docker ps -q)
docker rm $(docker ps -aq)
kubeadm reset

查看ConfigMap

[root@k8s-master k8s]# kubectl get -n kube-system configmap
NAME                                 DATA   AGE
coredns                              1      13m
extension-apiserver-authentication   6      13m
kube-proxy                           2      13m
kubeadm-config                       2      13m
kubelet-config-1.14                  1      13m
[root@k8s-master k8s]# 

k8s-node 初始化

• 配置源

• yum 安装

yum install kubelet-1.14.0 kubeadm-1.14.0 --disableexcludes=kubernetes

• 修改内核参数

cat /etc/sysctl.conf

net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1

• 关闭 swap

swapoff -a

• 初始化配置文件

# token 生成, master 上执行
kubeadm token create --print-join-command

[root@tyler k8s]# cat join-config.yaml 
apiVersion: kubeadm.k8s.io/v1beta1
kind: JoinConfiguration
discovery:
  bootstrapToken:
    apiServerEndpoint: 192.168.0.225:6443
    token: dwsn99.lhlejgnyrn4pj11g
    unsafeSkipCAVerification: true 
  tlsBootstrapToken: dwsn99.lhlejgnyrn4pj11g

• 初始化

kubeadm join --config=join-config.yaml