业务场景:

测试环境 由于一开始资源有限使用虚拟机机部署节点都是单节点,随着使用频繁业务量增加从新采购新的服务器把以前的master及etcd 单节点迁移到新采购服务器上面同时增加节点至3节点提供高可用环境

环境:

etcd 旧 节点IP: 192.168.30.31
etcd 新节点IP:192.168.30.17,192.168.30.18,192.168.30.19
kube-apiserver  旧节点IP:192.168.30.32
kube-apiserver 新节点IP:192.168.30.17,192.168.30.18,192.168.30.19
kube-apiserver  vipIP: 192.168.30.254
kube-apiserver 启动应用  kube-apiserver  kube-controller-manager  kube-scheduler
节点hostname node03 node4 node5

etcd 节点添加

# 操作节点:192.168.30.31
# 配置etcd 操作环境 API V3版本操作
修改 /etc/profile 添加
export ETCDCTL_API=3
export ENDPOINTS=https://192.168.30.31:2379
source /etc/profile
修改 ~/.bashrc 添加
alias etcdctl='/apps/etcd/bin/etcdctl --endpoints=${ENDPOINTS} --cacert=/apps/etcd/ssl/etcd-ca.pem --cert=/apps/etcd/ssl/etcd_client.pem   --key=/apps/etcd/ssl/etcd_client-key.pem'
source  ~/.bashrc
测试配置是否正确
etcdctl endpoint health
[root@etcd ~]# etcdctl endpoint health
https://192.168.30.31:2379 is healthy: successfully committed proposal: took = 20.258113ms
输出正常证明配置正确
# 备份etcd 数据 一定要进行备份如果不备份出错只能重新部署了
etcdctl  snapshot save snapshot.db
# 出现问题还原数据
etcdctl snapshot restore ./snapshot.db   --name=etcd \
--initial-advertise-peer-urls=https://192.168.30.31:2380  \
--initial-cluster-token=etcd-cluster-0 \
--initial-cluster=etcd=https://192.168.30.31:2380  \
--data-dir=/apps/etcd/data/default.etcd
# 生成新的数组证书
## 创建 ETCD Server 配置文件
export ETCD_SERVER_IPS=" \
    \"192.168.30.31\", \
    \"192.168.30.17\", \
    \"192.168.30.18\", \
    \"192.168.30.19\" \
" && \
export ETCD_SERVER_HOSTNAMES=" \
    \"etcd \", \
    \"etcd03 \", \
        \"etcd4 \", \
    \"etcd5\" \
" && \
cat << EOF | tee /opt/k8s/cfssl/etcd/etcd_server.json
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
    ${ETCD_SERVER_IPS},
    ${ETCD_SERVER_HOSTNAMES}
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "GuangDong",
      "L": "GuangZhou",
      "O": "niuke",
      "OU": "niuke"
    }
  ]
}
EOF
## 生成 ETCD Server 证书和私钥
cfssl gencert \
    -ca=/opt/k8s/cfssl/pki/etcd/etcd-ca.pem \
    -ca-key=/opt/k8s/cfssl/pki/etcd/etcd-ca-key.pem \
    -config=/opt/k8s/cfssl/ca-config.json \
    -profile=kubernetes \
    /opt/k8s/cfssl/etcd/etcd_server.json | \
    cfssljson -bare /opt/k8s/cfssl/pki/etcd/etcd_server

## 创建 ETCD Member 2 配置文件
export ETCD_MEMBER_2_IP=" \
    \"192.168.30.17\" \
" && \
export ETCD_MEMBER_2_HOSTNAMES="etcd03\
" && \
cat << EOF | tee /opt/k8s/cfssl/etcd/${ETCD_MEMBER_2_HOSTNAMES}.json
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
    ${ETCD_MEMBER_2_IP},
    "${ETCD_MEMBER_2_HOSTNAMES}"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "GuangDong",
      "L": "GuangZhou",
      "O": "niuke",
      "OU": "niuke"
    }
  ]
}
EOF
## 生成 ETCD Member 2 证书和私钥
cfssl gencert \
    -ca=/opt/k8s/cfssl/pki/etcd/etcd-ca.pem \
    -ca-key=/opt/k8s/cfssl/pki/etcd/etcd-ca-key.pem \
    -config=/opt/k8s/cfssl/ca-config.json \
    -profile=kubernetes \
    /opt/k8s/cfssl/etcd/${ETCD_MEMBER_2_HOSTNAMES}.json | \
    cfssljson -bare /opt/k8s/cfssl/pki/etcd/etcd_member_${ETCD_MEMBER_2_HOSTNAMES}

        ## 创建 ETCD Member 3 配置文件
export ETCD_MEMBER_3_IP=" \
    \"192.168.30.18\" \
" && \
export ETCD_MEMBER_3_HOSTNAMES="etcd4\
" && \
cat << EOF | tee /opt/k8s/cfssl/etcd/${ETCD_MEMBER_3_HOSTNAMES}.json
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
    ${ETCD_MEMBER_3_IP},
    "${ETCD_MEMBER_3_HOSTNAMES}"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "GuangDong",
      "L": "GuangZhou",
      "O": "niuke",
      "OU": "niuke"
    }
  ]
}
EOF
## 生成 ETCD Member 3 证书和私钥
cfssl gencert \
    -ca=/opt/k8s/cfssl/pki/etcd/etcd-ca.pem \
    -ca-key=/opt/k8s/cfssl/pki/etcd/etcd-ca-key.pem \
    -config=/opt/k8s/cfssl/ca-config.json \
    -profile=kubernetes \
    /opt/k8s/cfssl/etcd/${ETCD_MEMBER_3_HOSTNAMES}.json | \
    cfssljson -bare /opt/k8s/cfssl/pki/etcd/etcd_member_${ETCD_MEMBER_3_HOSTNAMES}

        ## 创建 ETCD Member 4 配置文件
export ETCD_MEMBER_4_IP=" \
    \"192.168.30.19\" \
" && \
export ETCD_MEMBER_4_HOSTNAMES="etcd5\
" && \
cat << EOF | tee /opt/k8s/cfssl/etcd/${ETCD_MEMBER_4_HOSTNAMES}.json
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
    ${ETCD_MEMBER_4_IP},
    "${ETCD_MEMBER_4_HOSTNAMES}"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "GuangDong",
      "L": "GuangZhou",
      "O": "niuke",
      "OU": "niuke"
    }
  ]
}
EOF
## 生成 ETCD Member 4证书和私钥
cfssl gencert \
    -ca=/opt/k8s/cfssl/pki/etcd/etcd-ca.pem \
    -ca-key=/opt/k8s/cfssl/pki/etcd/etcd-ca-key.pem \
    -config=/opt/k8s/cfssl/ca-config.json \
    -profile=kubernetes \
    /opt/k8s/cfssl/etcd/${ETCD_MEMBER_4_HOSTNAMES}.json | \
    cfssljson -bare /opt/k8s/cfssl/pki/etcd/etcd_member_${ETCD_MEMBER_4_HOSTNAMES}

#分发证书到每个节点
scp -r  /opt/k8s/cfssl/pki/etcd/etcd* root@192.168.30.17: /apps/etcd/ssl/
scp -r  /opt/k8s/cfssl/pki/etcd/etcd* root@192.168.30.18: /apps/etcd/ssl/
scp -r  /opt/k8s/cfssl/pki/etcd/etcd* root@192.168.30.19: /apps/etcd/ssl/
# 数据备份完成 添加节点
 etcdctl member add node03  --peer-urls=https://192.168.30.17:2380
##########################################################
etcdctl member add etcd03 https://192.168.30.17:2380
Added member named etcd03 with ID 92bf7d7f20e298fc to cluster
ETCD_NAME="etcd03"
ETCD_INITIAL_CLUSTER="etcd03=https://192.168.30.17:2380,etcd=https://192.168.30.31:2380"
ETCD_INITIAL_CLUSTER_STATE="existing"
#################################################################################
# 修改启动配文件
ETCD_OPTS="--name=node03 \
           --data-dir=/apps/etcd/data/default.etcd \
           --listen-peer-urls=https://192.168.30.17:2380 \
           --listen-client-urls=https://192.168.30.17:2379,https://127.0.0.1:2379 \
           --advertise-client-urls=https://192.168.30.17:2379 \
           --initial-advertise-peer-urls=https://192.168.30.17:2380 \
           --initial-cluster=etcd=https://192.168.30.31:2380,node03=https://192.168.30.17:2380 \
           --initial-cluster-token=etcd=https://192.168.30.31:2380,node03=https://192.168.30.17:2380 \
           --initial-cluster-state=existing \
           --heartbeat-interval=6000 \
           --election-timeout=30000 \
           --snapshot-count=5000 \
           --auto-compaction-retention=1 \
           --max-request-bytes=33554432 \
           --quota-backend-bytes=17179869184 \
           --trusted-ca-file=/apps/etcd/ssl/etcd-ca.pem \
           --cert-file=/apps/etcd/ssl/etcd_server.pem \
           --key-file=/apps/etcd/ssl/etcd_server-key.pem \
           --peer-cert-file=/apps/etcd/ssl/etcd_member_node03.pem \
           --peer-key-file=/apps/etcd/ssl/etcd_member_node03-key.pem \
           --peer-client-cert-auth \
           --peer-trusted-ca-file=/apps/etcd/ssl/etcd-ca.pem"

# 启动 node03 节点 etcd
service etcd start
修改 /etc/profile 添加新节点
export ENDPOINTS=https://192.168.30.17:2379,https://192.168.30.31:2379
 source /etc/profile
 etcdctl endpoint status
# 查看数据存储大小是否一致如果一致添加新的节点
 etcdctl member add node4  --peer-urls=https://192.168.30.18:2380
 ETCD_OPTS="--name=node4 \
           --data-dir=/apps/etcd/data/default.etcd \
           --listen-peer-urls=https://192.168.30.18:2380 \
           --listen-client-urls=https://192.168.30.18:2379,https://127.0.0.1:2379 \
           --advertise-client-urls=https://192.168.30.18:2379 \
           --initial-advertise-peer-urls=https://192.168.30.18:2380 \
           --initial-cluster=node4=https://192.168.30.18:2380,etcd=https://192.168.30.31:2380,node03=https://192.168.30.17:2380 \
           --initial-cluster-token=node4=https://192.168.30.18:2380,etcd=https://192.168.30.31:2380,node03=https://192.168.30.17:2380 \
           --initial-cluster-state=existing \
           --heartbeat-interval=6000 \
           --election-timeout=30000 \
           --snapshot-count=5000 \
           --auto-compaction-retention=1 \
           --max-request-bytes=33554432 \
           --quota-backend-bytes=17179869184 \
           --trusted-ca-file=/apps/etcd/ssl/etcd-ca.pem \
           --cert-file=/apps/etcd/ssl/etcd_server.pem \
           --key-file=/apps/etcd/ssl/etcd_server-key.pem \
           --peer-cert-file=/apps/etcd/ssl/etcd_member_node4.pem \
           --peer-key-file=/apps/etcd/ssl/etcd_member_node4-key.pem \
           --peer-client-cert-auth \
           --peer-trusted-ca-file=/apps/etcd/ssl/etcd-ca.pem"

 etcdctl member add node5  --peer-urls=https://192.168.30.19:2380
 ETCD_OPTS="--name=node5 \
           --data-dir=/apps/etcd/data/default.etcd \
           --listen-peer-urls=https://192.168.30.19:2380 \
           --listen-client-urls=https://192.168.30.19:2379,https://127.0.0.1:2379 \
           --advertise-client-urls=https://192.168.30.19:2379 \
           --initial-advertise-peer-urls=https://192.168.30.19:2380 \
           --initial-cluster=node4=https://192.168.30.18:2380,etcd=https://192.168.30.31:2380,node5=https://192.168.30.19:2380,node03=https://192.168.30.17:2380 \
           --initial-cluster-token=node4=https://192.168.30.18:2380,etcd=https://192.168.30.31:2380,node5=https://192.168.30.19:2380,node03=https://192.168.30.17:2380 \
           --initial-cluster-state=existing \
           --heartbeat-interval=6000 \
           --election-timeout=30000 \
           --snapshot-count=5000 \
           --auto-compaction-retention=1 \
           --max-request-bytes=33554432 \
           --quota-backend-bytes=17179869184 \
           --trusted-ca-file=/apps/etcd/ssl/etcd-ca.pem \
           --cert-file=/apps/etcd/ssl/etcd_server.pem \
           --key-file=/apps/etcd/ssl/etcd_server-key.pem \
           --peer-cert-file=/apps/etcd/ssl/etcd_member_node5.pem \
           --peer-key-file=/apps/etcd/ssl/etcd_member_node5-key.pem \
           --peer-client-cert-auth \
           --peer-trusted-ca-file=/apps/etcd/ssl/etcd-ca.pem"
####
修改  /etc/profile
export ENDPOINTS=https://192.168.30.17:2379,https://192.168.30.18:2379,https://192.168.30.19:2379
# 验证etcd 集群是否正常
[root@node03 ~]# etcdctl endpoint status
https://192.168.30.17:2379, 92bf7d7f20e298fc, 3.3.13, 30 MB, false, 16, 3963193
https://192.168.30.18:2379, 127f6360c5080113, 3.3.13, 30 MB, true, 16, 3963193
https://192.168.30.19:2379, 5a0a05654c847f54, 3.3.13, 30 MB, false, 16, 3963193
节点正常
#然后替换所有新节点
--initial-cluster=node4=https://192.168.30.18:2380,node5=https://192.168.30.19:2380,node03=https://192.168.30.17:2380 \
--initial-cluster-token=node4=https://192.168.30.18:2380,node5=https://192.168.30.19:2380,node03=https://192.168.30.17:2380 \
#这两个配置

kube-apiserver 节点添加

# 创建 新节点证书
## 创建 Kubernetes API Server 配置文件
export K8S_APISERVER_VIP=" \
    \"192.168.30.32\", \
    \"192.168.30.17\", \
    \"192.168.30.18\", \
    \"192.168.30.19\", \
    \"192.168.30.254\", \
" && \
export K8S_APISERVER_SERVICE_CLUSTER_IP="10.64.0.1" && \
export K8S_APISERVER_HOSTNAME="api.k8s.niuke.local" && \
export K8S_CLUSTER_DOMAIN_SHORTNAME="niuke" && \
export K8S_CLUSTER_DOMAIN_FULLNAME="niuke.local" && \
cat << EOF | tee /opt/k8s/cfssl/k8s/k8s_apiserver.json
{
  "CN": "kubernetes",
  "hosts": [
    "127.0.0.1",
    ${K8S_APISERVER_VIP}
    "${K8S_APISERVER_SERVICE_CLUSTER_IP}", 
    "${K8S_APISERVER_HOSTNAME}",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.${K8S_CLUSTER_DOMAIN_SHORTNAME}",
    "kubernetes.default.svc.${K8S_CLUSTER_DOMAIN_FULLNAME}"    
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "GuangDong",
      "L": "GuangZhou",
      "O": "niuke",
      "OU": "niuke"
    }
  ]
}
EOF

## 生成 Kubernetes API Server 证书和私钥
cfssl gencert \
    -ca=/opt/k8s/cfssl/pki/k8s/k8s-ca.pem \
    -ca-key=/opt/k8s/cfssl/pki/k8s/k8s-ca-key.pem \
    -config=/opt/k8s/cfssl/ca-config.json \
    -profile=kubernetes \
    /opt/k8s/cfssl/k8s/k8s_apiserver.json | \
    cfssljson -bare /opt/k8s/cfssl/pki/k8s/k8s_server

# 分发ssl 证书到节点
scp  -r /opt/k8s/cfssl/pki/k8s/ root@192.168.30.17:/apps/kubernetes/ssl/k8s
scp  -r /opt/k8s/cfssl/pki/k8s/ root@192.168.30.18:/apps/kubernetes/ssl/k8s
scp  -r /opt/k8s/cfssl/pki/k8s/ root@192.168.30.19:/apps/kubernetes/ssl/k8s
# 修改配置文件
###  kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=false \
        --bind-address=192.168.30.17 \
        --advertise-address=192.168.30.17 \
        --secure-port=5443 \
        --insecure-port=0 \
        --service-cluster-ip-range=10.64.0.0/16 \
        --service-node-port-range=30000-65000 \
        --etcd-cafile=/apps/kubernetes/ssl/etcd/etcd-ca.pem \
        --etcd-certfile=/apps/kubernetes/ssl/etcd/etcd_client.pem \
        --etcd-keyfile=/apps/kubernetes/ssl/etcd/etcd_client-key.pem \
        --etcd-prefix=/registry \
        --etcd-servers=https://192.168.30.17:2379,https://192.168.30.18:2379,https://192.168.30.19:2379 \
        --client-ca-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
        --tls-cert-file=/apps/kubernetes/ssl/k8s/k8s_server.pem \
        --tls-private-key-file=/apps/kubernetes/ssl/k8s/k8s_server-key.pem \
        --kubelet-client-certificate=/apps/kubernetes/ssl/k8s/k8s_server.pem \
        --kubelet-client-key=/apps/kubernetes/ssl/k8s/k8s_server-key.pem \
        --service-account-key-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
        --requestheader-client-ca-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
        --proxy-client-cert-file=/apps/kubernetes/ssl/k8s/aggregator.pem \
        --proxy-client-key-file=/apps/kubernetes/ssl/k8s/aggregator-key.pem \
        --requestheader-allowed-names=aggregator \
        --requestheader-group-headers=X-Remote-Group \
        --requestheader-extra-headers-prefix=X-Remote-Extra- \
        --requestheader-username-headers=X-Remote-User \
        --enable-aggregator-routing=true \
        --anonymous-auth=false \
        --experimental-encryption-provider-config=/apps/kubernetes/config/encryption-config.yaml \
        --enable-admission-plugins=AlwaysPullImages,DefaultStorageClass,DefaultTolerationSeconds,LimitRanger,NamespaceExists,NamespaceLifecycle,NodeRestriction,OwnerReferencesPermissionEnforcement,PodNodeSelector,PersistentVolumeClaimResize,PodPreset,PodTolerationRestriction,ResourceQuota,ServiceAccount,StorageObjectInUseProtection MutatingAdmissionWebhook ValidatingAdmissionWebhook \
        --disable-admission-plugins=DenyEscalatingExec,ExtendedResourceToleration,ImagePolicyWebhook,LimitPodHardAntiAffinityTopology,NamespaceAutoProvision,Priority,EventRateLimit,PodSecurityPolicy \
        --cors-allowed-origins=.* \
        --enable-swagger-ui \
        --runtime-config=api/all=true \
        --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
        --authorization-mode=Node,RBAC \
        --allow-privileged=true \
        --apiserver-count=1 \
        --audit-log-maxage=30 \
        --audit-log-maxbackup=3 \
        --audit-log-maxsize=100 \
        --kubelet-https \
        --event-ttl=1h \
        --feature-gates=RotateKubeletServerCertificate=true,RotateKubeletClientCertificate=true \
        --enable-bootstrap-token-auth=true \
        --audit-log-path=/apps/kubernetes/log/api-server-audit.log \
        --alsologtostderr=true \
        --log-dir=/apps/kubernetes/log \
        --v=2 \
        --endpoint-reconciler-type=lease \
        --max-mutating-requests-inflight=100 \
        --max-requests-inflight=500 \
        --target-ram-mb=6000"

###  kube-controller-manager                

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \
--leader-elect=true \
--address=0.0.0.0 \
--service-cluster-ip-range=10.64.0.0/16 \
--cluster-cidr=10.65.0.0/16 \
--node-cidr-mask-size=24 \
--cluster-name=kubernetes \
--allocate-node-cidrs=true \
--kubeconfig=/apps/kubernetes/config/kube_controller_manager.kubeconfig \
--authentication-kubeconfig=/apps/kubernetes/config/kube_controller_manager.kubeconfig \
--authorization-kubeconfig=/apps/kubernetes/config/kube_controller_manager.kubeconfig \
--use-service-account-credentials=true \
--client-ca-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
--requestheader-client-ca-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
--node-monitor-grace-period=40s \
--node-monitor-period=5s \
--pod-eviction-timeout=5m0s \
--terminated-pod-gc-threshold=50 \
--alsologtostderr=true \
--cluster-signing-cert-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
--cluster-signing-key-file=/apps/kubernetes/ssl/k8s/k8s-ca-key.pem  \
--deployment-controller-sync-period=10s \
--experimental-cluster-signing-duration=86700h0m0s \
--enable-garbage-collector=true \
--root-ca-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
--service-account-private-key-file=/apps/kubernetes/ssl/k8s/k8s-ca-key.pem \
--feature-gates=RotateKubeletServerCertificate=true,RotateKubeletClientCertificate=true \
--controllers=*,bootstrapsigner,tokencleaner \
--horizontal-pod-autoscaler-use-rest-clients=true \
--horizontal-pod-autoscaler-sync-period=10s \
--flex-volume-plugin-dir=/apps/kubernetes/kubelet-plugins/volume \
--tls-cert-file=/apps/kubernetes/ssl/k8s/k8s_controller_manager.pem \
--tls-private-key-file=/apps/kubernetes/ssl/k8s/k8s_controller_manager-key.pem \
--kube-api-qps=100 \
--kube-api-burst=100 \
--log-dir=/apps/kubernetes/log \
--v=2"

### kube-scheduler

KUBE_SCHEDULER_OPTS=" \
                   --logtostderr=false \
                   --address=0.0.0.0 \
                   --leader-elect=true \
                   --kubeconfig=/apps/kubernetes/config/kube_scheduler.kubeconfig \
                   --authentication-kubeconfig=/apps/kubernetes/config/kube_scheduler.kubeconfig \
                   --authorization-kubeconfig=/apps/kubernetes/config/kube_scheduler.kubeconfig \
                   --alsologtostderr=true \
                   --kube-api-qps=100 \
                   --kube-api-burst=100 \
                   --log-dir=/apps/kubernetes/log \
                   --v=2"
# 其它两个节点参考17节点
service kube-apiserver start
service kube-controller-manager  start
service kube-scheduler start

验证新增节点是否正常

https://192.168.30.17:5443/apis
https://192.168.30.18:5443/apis
https://192.168.30.18:5443/apis

kubernetes 添加删除master 节点及etcd节点

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kubernetes 添加删除master 节点及etcd节点

安装haproxy 及keepalived

yum install -y haproxy keepalived

修改 haproxy 配置
 /etc/haproxy/haproxy.cfg
 frontend kube-apiserver-https
  mode tcp
  bind :6443
  default_backend kube-apiserver-backend
backend kube-apiserver-backend
  mode tcp
  server 192.168.30.17-api 192.168.30.17:5443 check
  server 192.168.30.18-api 192.168.30.18:5443 check
  server 192.168.30.19-api 192.168.30.19:5443 check
# 启动haproxy 
service haproxy  start 
三台配置一样
# 修改keepalived 配置
192.168.30.19配置
cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
 router_id LVS_DEVEL
}

vrrp_script check_haproxy {
  script "killall -0 haproxy"
  interval 3
  weight -2
  fall 10
  rise 2
}

vrrp_instance VI_1 {
  state MASTER
  interface br0
  virtual_router_id 51
  priority 250
  advert_int 2
  authentication {
    auth_type PASS
    auth_pass  99ce6e3381dc326633737ddaf5d904d2
  }
  virtual_ipaddress {
    192.168.30.254/24
  }
  track_script {
    check_haproxy
  }
}
### 192.168.30.18 配置
cat /etc/keepalived/keepalived.conf
 ! Configuration File for keepalived

global_defs {
 router_id LVS_DEVEL
}

vrrp_script check_haproxy {
  script "killall -0 haproxy"
  interval 3
  weight -2
  fall 10
  rise 2
}

vrrp_instance VI_1 {
  state BACKUP
  interface br0
  virtual_router_id 51
  priority 249
  advert_int 2
  authentication {
    auth_type PASS
    auth_pass 99ce6e3381dc326633737ddaf5d904d2
  }
  virtual_ipaddress {
    192.168.30.254/24
  }
  track_script {
    check_haproxy
  }
}
## 192.168.30.17 配置
cat /etc/keepalived/keepalived.conf
 ! Configuration File for keepalived

global_defs {
 router_id LVS_DEVEL
}

vrrp_script check_haproxy {
  script "killall -0 haproxy"
  interval 3
  weight -2
  fall 10
  rise 2
}

vrrp_instance VI_1 {
  state BACKUP
  interface br0
  virtual_router_id 51
  priority 248
  advert_int 2
  authentication {
    auth_type PASS
    auth_pass 99ce6e3381dc326633737ddaf5d904d2
  }
  virtual_ipaddress {
    192.168.30.254/24
  }
  track_script {
    check_haproxy
  }
}

### 启动三台 keepalived 
service keepalived start
192.168.30.19 配置为master

[root@node5 ~]# ip a | grep br0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br0 state UP group default qlen 1000
6: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    inet 192.168.30.19/24 brd 192.168.30.255 scope global br0
    inet 192.168.30.254/24 scope global secondary br0
# 测试192.168.30.254 是否能正常访问
https://192.168.30.254:6443

kubernetes 添加删除master 节点及etcd节点
能正常打开

修改node 节点 
bootstrap.kubeconfig
kubelet.kubeconfig 两个文件连接地址
本地~/.kube/config 文件连接地址
可以使用vim 修改
 server: https://192.168.30.254:6443

 修改完成重启node 节点
 service kubelet restart
 验证node 节点是否正
 kubectl get node
 [root@]~]#kubectl get node
NAME         STATUS   ROLES         AGE   VERSION
ingress      Ready    k8s-ingress   60d   v1.14.6
ingress-01   Ready    k8s-ingress   29d   v1.14.6
node01       Ready    k8s-node      60d   v1.14.6
node02       Ready    k8s-node      60d   v1.14.6
node03       Ready    k8s-node      12d   v1.14.6
node4        Ready    k8s-node      12d   v1.14.6
node5        Ready    k8s-node      12d   v1.14.6
所有节点正常

删除etcd 旧节点

service etcd stop

etcdctl member list
查找 member key
etcdctl endpoint status
验证k8s 集群是否正常
### 删除旧节点
etcdctl member remove 7994ca589d94dceb
再次验证集群
[root@node03 ~]# etcdctl member list
127f6360c5080113, started, node4, https://192.168.30.18:2380, https://192.168.30.18:2379
5a0a05654c847f54, started, node5, https://192.168.30.19:2380, https://192.168.30.19:2379
92bf7d7f20e298fc, started, node03, https://192.168.30.17:2380, https://192.168.30.17:2379
[root@node03 ~]# etcdctl endpoint status
https://192.168.30.17:2379, 92bf7d7f20e298fc, 3.3.13, 30 MB, false, 16, 3976114
https://192.168.30.18:2379, 127f6360c5080113, 3.3.13, 30 MB, true, 16, 3976114
https://192.168.30.19:2379, 5a0a05654c847f54, 3.3.13, 30 MB, false, 16, 3976114
[root@node03 ~]# etcdctl endpoint hashkv
https://192.168.30.17:2379, 189505982
https://192.168.30.18:2379, 189505982
https://192.168.30.19:2379, 189505982
[root@node03 ~]# etcdctl endpoint health
https://192.168.30.17:2379 is healthy: successfully committed proposal: took = 2.671314ms
https://192.168.30.18:2379 is healthy: successfully committed proposal: took = 2.2904ms
https://192.168.30.19:2379 is healthy: successfully committed proposal: took = 3.555137ms
[root@]~]#kubectl get node
NAME         STATUS   ROLES         AGE   VERSION
ingress      Ready    k8s-ingress   60d   v1.14.6
ingress-01   Ready    k8s-ingress   29d   v1.14.6
node01       Ready    k8s-node      60d   v1.14.6
node02       Ready    k8s-node      60d   v1.14.6
node03       Ready    k8s-node      12d   v1.14.6
node4        Ready    k8s-node      12d   v1.14.6
node5        Ready    k8s-node      12d   v1.14.6
一切正常
删除etcd 开机启动
chkconfig etcd off

删除 kube-apiserver 旧节点

service kube-controller-manager stop
service kube-scheduler stop
service kube-apiserver   stop 
删除开机启动 
chkconfig  kube-controller-manager off
chkconfig  kube-scheduler   off
chkconfig   kube-apiserver  off
再次验证
kubectl get node
[root@]~]#kubectl get node
NAME         STATUS   ROLES         AGE   VERSION
ingress      Ready    k8s-ingress   60d   v1.14.6
ingress-01   Ready    k8s-ingress   29d   v1.14.6
node01       Ready    k8s-node      60d   v1.14.6
node02       Ready    k8s-node      60d   v1.14.6
node03       Ready    k8s-node      12d   v1.14.6
node4        Ready    k8s-node      12d   v1.14.6
node5        Ready    k8s-node      12d   v1.14.6
[root@]~]#kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-0               Healthy   {"health":"true"}
etcd-1               Healthy   {"health":"true"}
etcd-2               Healthy   {"health":"true"}
访问k8s 集群里面的业务如果都正常证明增加删除节点操作正确