rke部署高可用k8s集群(代码片段)

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=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

# If you intened to deploy Kubernetes in an air-gapped environment,
# please consult the documentation on how to configure custom RKE images.
nodes:
- address: "192.168.30.110"
  port: "22"
  internal_address: ""
  role: [controlplane,etcd,worker]
  hostname_override: "node1"
  user: admin
  docker_socket: /var/run/docker.sock
  ssh_key: ""
  ssh_key_path: ~/.ssh/id_rsa
  ssh_cert: ""
  ssh_cert_path: ""
  labels: 
  taints: []
- address: "192.168.30.129"
  port: "22"
  internal_address: ""
  role: [controlplane,etcd,worker]
  hostname_override: "node2"
  user: admin
  docker_socket: /var/run/docker.sock
  ssh_key: ""
  ssh_key_path: ~/.ssh/id_rsa
  ssh_cert: ""
  ssh_cert_path: ""
  labels: 
  taints: []
- address: "192.168.30.133"
  port: "22"
  internal_address: ""
  role: [controlplane,etcd,worker]
  hostname_override: "node3"
  user: admin
  docker_socket: /var/run/docker.sock
  ssh_key: ""
  ssh_key_path: ~/.ssh/id_rsa
  ssh_cert: ""
  ssh_cert_path: ""
  labels: 
  taints: []
services:
  etcd:
    image: ""
    extra_args: 
    extra_binds: []
    extra_env: []
    external_urls: []
    ca_cert: ""
    cert: ""
    key: ""
    path: ""
    uid: 0
    gid: 0
    snapshot: null
    retention: ""
    creation: ""
    backup_config: null
  kube-api:
    image: ""
    extra_args: 
    extra_binds: []
    extra_env: []
    service_cluster_ip_range: 10.43.0.0/16
    service_node_port_range: ""
    pod_security_policy: false
    always_pull_images: false
    secrets_encryption_config: null
    audit_log: null
    admission_configuration: null
    event_rate_limit: null
  kube-controller:
    image: ""
    extra_args: 
    extra_binds: []
    extra_env: []
    cluster_cidr: 10.42.0.0/16
    service_cluster_ip_range: 10.43.0.0/16
  scheduler:
    image: ""
    extra_args: 
    extra_binds: []
    extra_env: []
  kubelet:
    image: ""
    extra_args: 
    extra_binds: []
    extra_env: []
    cluster_domain: cluster.local
    infra_container_image: ""
    cluster_dns_server: 10.43.0.10
    fail_swap_on: false
    generate_serving_certificate: false
  kubeproxy:
    image: ""
    extra_args: 
    extra_binds: []
    extra_env: []
network:
  plugin: flannel
  options: 
  mtu: 0
  node_selector: 
  update_strategy: null
authentication:
  strategy: x509
  sans: []
  webhook: null
addons: ""
addons_include: []
system_images:
  etcd: rancher/coreos-etcd:v3.4.3-rancher1
  alpine: rancher/rke-tools:v0.1.58
  nginx_proxy: rancher/rke-tools:v0.1.58
  cert_downloader: rancher/rke-tools:v0.1.58
  kubernetes_services_sidecar: rancher/rke-tools:v0.1.58
  kubedns: rancher/k8s-dns-kube-dns:1.15.2
  dnsmasq: rancher/k8s-dns-dnsmasq-nanny:1.15.2
  kubedns_sidecar: rancher/k8s-dns-sidecar:1.15.2
  kubedns_autoscaler: rancher/cluster-proportional-autoscaler:1.7.1
  coredns: rancher/coredns-coredns:1.6.9
  coredns_autoscaler: rancher/cluster-proportional-autoscaler:1.7.1
  nodelocal: rancher/k8s-dns-node-cache:1.15.7
  kubernetes: rancher/hyperkube:v1.18.3-rancher2
  flannel: rancher/coreos-flannel:v0.12.0
  flannel_cni: rancher/flannel-cni:v0.3.0-rancher6
  calico_node: rancher/calico-node:v3.13.4
  calico_cni: rancher/calico-cni:v3.13.4
  calico_controllers: rancher/calico-kube-controllers:v3.13.4
  calico_ctl: rancher/calico-ctl:v3.13.4
  calico_flexvol: rancher/calico-pod2daemon-flexvol:v3.13.4
  canal_node: rancher/calico-node:v3.13.4
  canal_cni: rancher/calico-cni:v3.13.4
  canal_flannel: rancher/coreos-flannel:v0.12.0
  canal_flexvol: rancher/calico-pod2daemon-flexvol:v3.13.4
  weave_node: weaveworks/weave-kube:2.6.4
  weave_cni: weaveworks/weave-npc:2.6.4
  pod_infra_container: rancher/pause:3.1
  ingress: rancher/nginx-ingress-controller:nginx-0.32.0-rancher1
  ingress_backend: rancher/nginx-ingress-controller-defaultbackend:1.5-rancher1
  metrics_server: rancher/metrics-server:v0.3.6
  windows_pod_infra_container: rancher/kubelet-pause:v0.1.4
ssh_key_path: ~/.ssh/id_rsa
ssh_cert_path: ""
ssh_agent_auth: false
authorization:
  mode: rbac
  options: 
ignore_docker_version: null
kubernetes_version: ""
private_registries: []
ingress:
  provider: ""
  options: 
  node_selector: 
  extra_args: 
  dns_policy: ""
  extra_envs: []
  extra_volumes: []
  extra_volume_mounts: []
  update_strategy: null
cluster_name: ""
cloud_provider:
  name: ""
prefix_path: ""
addon_job_timeout: 0
bastion_host:
  address: ""
  port: ""
  user: ""
  ssh_key: ""
  ssh_key_path: ""
  ssh_cert: ""
  ssh_cert_path: ""
monitoring:
  provider: ""
  options: 
  node_selector: 
  update_strategy: null
  replicas: null
restore:
  restore: false
  snapshot_name: ""
dns: null

mkdir rancher
cat > rancher/clear.sh << EOF
df -h|grep kubelet |awk -F % ‘print $2‘|xargs umount 
rm /var/lib/kubelet/* -rf
rm /etc/kubernetes/* -rf
rm /var/lib/rancher/* -rf
rm /var/lib/etcd/* -rf
rm /var/lib/cni/* -rf

rm -rf /var/run/calico 

iptables -F && iptables -t nat -F

ip link del flannel.1

docker ps -a|awk ‘print $1‘|xargs docker rm -f
docker volume ls|awk ‘print $2‘|xargs docker volume rm

rm -rf /var/etcd/
rm -rf /run/kubernetes/
docker rm -fv $(docker ps -aq)
docker volume rm  $(docker volume ls)
rm -rf /etc/cni
rm -rf /opt/cni

systemctl restart docker
EOF
sh rancher/clear.sh

首先查看Docker版本
# yum list installed | grep docker
docker-ce.x86_64  18.05.0.ce-3.el7.centos @docker-ce-edge
 
执行卸载
# yum -y remove docker-ce.x86_64
 
删除存储目录
 
# rm -rf /etc/docker
# rm -rf /run/docker
# rm -rf /var/lib/dockershim
# rm -rf /var/lib/docker


如果发现删除不掉，需要先 umount，如
# umount /var/lib/docker/devicemapper