kubeadm安装Kubernetes V1.10集群详细文档
2024-05-16 00:01:56
1:服务器信息以及节点介绍
系统信息：centos1708 minimal 只修改IP地址
| 主机名称 | IP | 备注 |
|---|---|---|
| node01 | 192.168.150.181 | master and etcd |
| rode02 | 192.168.150.182 | master and etcd |
| node03 | 192.168.150.183 | master and etcd |
| node04 | 192.168.150.184 | node |
| VIP | 192.168.150.186 |
软件版本：
docker17.03.2-ce
socat-1.7.3.2-2.el7.x86_64
kubelet-1.10.0-0.x86_64
kubernetes-cni-0.6.0-0.x86_64
kubectl-1.10.0-0.x86_64
kubeadm-1.10.0-0.x86_64
1:环境初始化
1：分别在4台主机设置主机名称
hostnamectl set-hostname node01 hostnamectl set-hostname node02 hostnamectl set-hostname node03 hostnamectl set-hostname node04
2:配置主机映射
cat <<EOF > /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.150.181 node01192.168.150.182 node02192.168.150.183 node03192.168.150.184 node04 EOF
3：node01上执行ssh免密码登陆配置
ssh-keygen #一路回车即可ssh-copy-id node02 ssh-copy-id node03 ssh-copy-id node04
4：四台主机配置、停防火墙、关闭Swap、关闭Selinux、设置内核、K8S的yum源、安装依赖包、配置ntp（配置完后建议重启一次）
systemctl stop firewalld systemctl disable firewalldswapoff -a sed -i 's/.*swap.*/#&/' /etc/fstabsetenforce 0 sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/selinux/config modprobe br_netfilter cat <<EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1net.bridge.bridge-nf-call-iptables = 1EOF sysctl -p /etc/sysctl.d/k8s.conf ls /proc/sys/net/bridgecat <<EOF > /etc/yum.repos.d/kubernetes.repo[kubernetes]name=Kubernetesbaseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/enabled=1gpgcheck=1repo_gpgcheck=1gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpgEOFyum install -y epel-release yum install -y yum-utils device-mapper-persistent-data lvm2 net-tools conntrack-tools wget vim ntpdate libseccomp libtool-ltdl systemctl enable ntpdate.service echo '*/30 * * * * /usr/sbin/ntpdate time7.aliyun.com >/dev/null 2>&1' > /tmp/crontab2.tmp crontab /tmp/crontab2.tmp systemctl start ntpdate.serviceecho "* soft nofile 65536" >> /etc/security/limits.conf echo "* hard nofile 65536" >> /etc/security/limits.conf echo "* soft nproc 65536" >> /etc/security/limits.conf echo "* hard nproc 65536" >> /etc/security/limits.conf echo "* soft memlock unlimited" >> /etc/security/limits.conf echo "* hard memlock unlimited" >> /etc/security/limits.conf
2：安装、配置keepalived（主节点）
1:安装keepalived
yum install -y keepalived systemctl enable keepalived
node01的keepalived.conf
cat <<EOF > /etc/keepalived/keepalived.conf
global_defs {router_id LVS_k8s}vrrp_script CheckK8sMaster {script "curl -k https://192.168.150.186:6443"interval 3timeout 9fall 2rise 2}vrrp_instance VI_1 {state MASTER interface ens160virtual_router_id 61priority 100advert_int 1mcast_src_ip 192.168.150.181nopreemptauthentication {auth_type PASSauth_pass sqP05dQgMSlzrxHj }unicast_peer {192.168.150.182192.168.150.183}virtual_ipaddress {192.168.150.186/24}track_script {CheckK8sMaster}}EOF
node02的keepalived.conf
cat <<EOF > /etc/keepalived/keepalived.conf
global_defs {router_id LVS_k8s}global_defs {router_id LVS_k8s}vrrp_script CheckK8sMaster {script "curl -k https://192.168.150.186:6443"interval 3timeout 9fall 2rise 2}vrrp_instance VI_1 {state BACKUP interface ens160virtual_router_id 61priority 90advert_int 1mcast_src_ip 192.168.150.182nopreemptauthentication {auth_type PASSauth_pass sqP05dQgMSlzrxHj }unicast_peer {192.168.150.181192.168.150.183}virtual_ipaddress {192.168.150.186/24}track_script {CheckK8sMaster}}EOF
node03的keepalived.conf
cat <<EOF > /etc/keepalived/keepalived.conf
global_defs {router_id LVS_k8s}global_defs {router_id LVS_k8s}vrrp_script CheckK8sMaster {script "curl -k https://192.168.150.186:6443"interval 3timeout 9fall 2rise 2}vrrp_instance VI_1 {state BACKUP interface ens160virtual_router_id 61priority 80advert_int 1mcast_src_ip 192.168.150.183nopreemptauthentication {auth_type PASSauth_pass sqP05dQgMSlzrxHj }unicast_peer {192.168.150.181192.168.150.182}virtual_ipaddress {192.168.150.186/24}track_script {CheckK8sMaster}}EOF
2：启动keepalived
systemctl restart keepalived
可以看到VIP已经绑定到node01上面了
ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000link/ether 00:50:56:b2:09:6a brd ff:ff:ff:ff:ff:ffinet 192.168.150.181/24 brd 192.168.150.255 scope global ens160valid_lft forever preferred_lft foreverinet 192.168.150.186/24 scope global secondary ens160valid_lft forever preferred_lft foreverinet6 fe80::e3d1:55df:2f64:8571/64 scope link valid_lft forever preferred_lft forever
3：创建etcd证书(node01上执行即可)
1：设置cfssl环境
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64chmod +x cfssl_linux-amd64 mv cfssl_linux-amd64 /usr/local/bin/cfssl chmod +x cfssljson_linux-amd64 mv cfssljson_linux-amd64 /usr/local/bin/cfssljson chmod +x cfssl-certinfo_linux-amd64 mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfoexport PATH=/usr/local/bin:$PATH
2：创建 CA 配置文件（下面配置的IP为etc节点的IP）
mkdir /root/ssl
cd /root/ssl
cat > ca-config.json <<EOF{"signing": {"default": {"expiry": "8760h"},"profiles": {"kubernetes-Soulmate": {"usages": ["signing","key encipherment","server auth","client auth"],"expiry": "8760h"}}}}EOFcat > ca-csr.json <<EOF{"CN": "kubernetes-Soulmate","key": {"algo": "rsa","size": 2048},"names": [{"C": "CN","ST": "shanghai","L": "shanghai","O": "k8s","OU": "System"}]}EOFcfssl gencert -initca ca-csr.json | cfssljson -bare cacat > etcd-csr.json <<EOF{"CN": "etcd","hosts": ["127.0.0.1","192.168.150.181","192.168.150.182","192.168.150.183"],"key": {"algo": "rsa","size": 2048},"names": [{"C": "CN","ST": "shanghai","L": "shanghai","O": "k8s","OU": "System"}]}EOFcfssl gencert -ca=ca.pem \ -ca-key=ca-key.pem \ -config=ca-config.json \ -profile=kubernetes-Soulmate etcd-csr.json | cfssljson -bare etcd
3:node01分发etcd证书到node02、node03上面
mkdir -p /etc/etcd/ssl cp etcd.pem etcd-key.pem ca.pem /etc/etcd/ssl/ssh -n node02 "mkdir -p /etc/etcd/ssl && exit"ssh -n node03 "mkdir -p /etc/etcd/ssl && exit"scp -r /etc/etcd/ssl/*.pem node02:/etc/etcd/ssl/ scp -r /etc/etcd/ssl/*.pem node03:/etc/etcd/ssl/
4：安装配置etcd (三主节点）
1:安装etcd
yum install etcd -y mkdir -p /var/lib/etcd
node01的etcd.service
cat <<EOF >/etc/systemd/system/etcd.service[Unit]Description=Etcd ServerAfter=network.targetAfter=network-online.targetWants=network-online.targetDocumentation=https://github.com/coreos[Service]Type=notifyWorkingDirectory=/var/lib/etcd/ExecStart=/usr/bin/etcd \ --name node01 \ --cert-file=/etc/etcd/ssl/etcd.pem \ --key-file=/etc/etcd/ssl/etcd-key.pem \ --peer-cert-file=/etc/etcd/ssl/etcd.pem \ --peer-key-file=/etc/etcd/ssl/etcd-key.pem \ --trusted-ca-file=/etc/etcd/ssl/ca.pem \ --peer-trusted-ca-file=/etc/etcd/ssl/ca.pem \ --initial-advertise-peer-urls https://192.168.150.181:2380 \--listen-peer-urls https://192.168.150.181:2380 \--listen-client-urls https://192.168.150.181:2379,http://127.0.0.1:2379 \--advertise-client-urls https://192.168.150.181:2379 \--initial-cluster-token etcd-cluster-0 \ --initial-cluster node01=https://192.168.150.181:2380,node02=https://192.168.150.182:2380,node03=https://192.168.150.183:2380 \--initial-cluster-state new \ --data-dir=/var/lib/etcdRestart=on-failureRestartSec=5LimitNOFILE=65536[Install]WantedBy=multi-user.target EOF
node02的etcd.service
cat <<EOF >/etc/systemd/system/etcd.service[Unit]Description=Etcd ServerAfter=network.targetAfter=network-online.targetWants=network-online.targetDocumentation=https://github.com/coreos[Service]Type=notifyWorkingDirectory=/var/lib/etcd/ExecStart=/usr/bin/etcd \ --name node02 \ --cert-file=/etc/etcd/ssl/etcd.pem \ --key-file=/etc/etcd/ssl/etcd-key.pem \ --peer-cert-file=/etc/etcd/ssl/etcd.pem \ --peer-key-file=/etc/etcd/ssl/etcd-key.pem \ --trusted-ca-file=/etc/etcd/ssl/ca.pem \ --peer-trusted-ca-file=/etc/etcd/ssl/ca.pem \ --initial-advertise-peer-urls https://192.168.150.182:2380 \--listen-peer-urls https://192.168.150.182:2380 \--listen-client-urls https://192.168.150.182:2379,http://127.0.0.1:2379 \--advertise-client-urls https://192.168.150.182:2379 \--initial-cluster-token etcd-cluster-0 \ --initial-cluster node01=https://192.168.150.181:2380,node02=https://192.168.150.182:2380,node03=https://192.168.150.183:2380 \--initial-cluster-state new \ --data-dir=/var/lib/etcdRestart=on-failureRestartSec=5LimitNOFILE=65536[Install]WantedBy=multi-user.target EOF
node03的etcd.service
cat <<EOF >/etc/systemd/system/etcd.service[Unit]Description=Etcd ServerAfter=network.targetAfter=network-online.targetWants=network-online.targetDocumentation=https://github.com/coreos[Service]Type=notifyWorkingDirectory=/var/lib/etcd/ExecStart=/usr/bin/etcd \ --name node03 \ --cert-file=/etc/etcd/ssl/etcd.pem \ --key-file=/etc/etcd/ssl/etcd-key.pem \ --peer-cert-file=/etc/etcd/ssl/etcd.pem \ --peer-key-file=/etc/etcd/ssl/etcd-key.pem \ --trusted-ca-file=/etc/etcd/ssl/ca.pem \ --peer-trusted-ca-file=/etc/etcd/ssl/ca.pem \ --initial-advertise-peer-urls https://192.168.150.183:2380 \--listen-peer-urls https://192.168.150.183:2380 \--listen-client-urls https://192.168.150.183:2379,http://127.0.0.1:2379 \--advertise-client-urls https://192.168.150.183:2379 \--initial-cluster-token etcd-cluster-0 \--initial-cluster node01=https://192.168.150.181:2380,node02=https://192.168.150.182:2380,node03=https://192.168.150.183:2380 \--initial-cluster-state new \ --data-dir=/var/lib/etcdRestart=on-failureRestartSec=5LimitNOFILE=65536[Install]WantedBy=multi-user.target EOF
2：添加自启动（etc集群最少2个节点才能启动，启动报错看mesages日志）
mv etcd.service /usr/lib/systemd/system/systemctl daemon-reloadsystemctl enable etcdsystemctl start etcdsystemctl status etcd
3：在三个etcd节点执行一下命令检查
etcdctl --endpoints=https://192.168.150.181:2379,https://192.168.150.182:2379,https://192.168.150.183:2379 \--ca-file=/etc/etcd/ssl/ca.pem \ --cert-file=/etc/etcd/ssl/etcd.pem \ --key-file=/etc/etcd/ssl/etcd-key.pem cluster-health
5：所有节点安装配置docker
1:安装docker（kubeadm目前支持docker最高版本是17.03.x）
yum install https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm -yyum install https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-17.03.2.ce-1.el7.centos.x86_64.rpm -y
修改配置文件 vim /usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --registry-mirror=https://ms3cfraz.mirror.aliyuncs.com
启动docker
systemctl daemon-reload systemctl restart docker systemctl enable docker systemctl status docker
6: 安装、配置kubeadm
1：所有节点安装kubelet kubeadm kubectl
yum install -y kubelet kubeadm kubectl systemctl enable kubelet
2: 所有节点修改kubelet配置文件
/etc/systemd/system/kubelet.service.d/10-kubeadm.conf
#修改这一行Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"#添加这一行Environment="KUBELET_EXTRA_ARGS=--v=2 --fail-swap-on=false --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/k8sth/pause-amd64:3.0"
3：所有节点修改完配置文件一定要重新加载配置
systemctl daemon-reload systemctl enable kubelet
4: 命令补全
yum install -y bash-completion source /usr/share/bash-completion/bash_completion source <(kubectl completion bash)echo "source <(kubectl completion bash)" >> ~/.bashrc
7：初始化集群
1：node01、node02、node03添加集群初始配置文件（集群配置文件一样）
cat <<EOF > config.yaml apiVersion: kubeadm.k8s.io/v1alpha1 kind: MasterConfigurationetcd:endpoints:- https://192.168.150.181:2379- https://192.168.150.182:2379- https://192.168.150.183:2379caFile: /etc/etcd/ssl/ca.pemcertFile: /etc/etcd/ssl/etcd.pemkeyFile: /etc/etcd/ssl/etcd-key.pemdataDir: /var/lib/etcd networking:podSubnet: 10.244.0.0/16kubernetesVersion: 1.10.0api:advertiseAddress: "192.168.150.186"token: "b99a00.a144ef80536d4344"tokenTTL: "0s"apiServerCertSANs:- node01- node02- node03- 192.168.150.181- 192.168.150.182- 192.168.150.183- 192.168.150.184- 192.168.150.186featureGates:CoreDNS: trueimageRepository: "registry.cn-hangzhou.aliyuncs.com/k8sth"EOF
2：首先node01初始化集群
配置文件定义podnetwork是10.244.0.0/16
kubeadmin init –hlep可以看出，service默认网段是10.96.0.0/12
/etc/systemd/system/kubelet.service.d/10-kubeadm.conf默认dns地址cluster-dns=10.96.0.10
kubeadm init --config config.yaml
初始化失败后处理办法
kubeadm reset#或rm -rf /etc/kubernetes/*.conf
rm -rf /etc/kubernetes/manifests/*.yaml
docker ps -a |awk '{print $1}' |xargs docker rm -f
systemctl stop kubelet
初始化正常的结果如下
Your Kubernetes master has initialized successfully!To start using your cluster, you need to run the following as a regular user:mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown $(id -u):$(id -g) $HOME/.kube/configYou 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 machines by running the following on each nodeas root:kubeadm join 192.168.150.186:6443 --token b99a00.a144ef80536d4344 --discovery-token-ca-cert-hash sha256:f79b68fb698c92b9336474eb3bf184e847f967dc58a6296911892662b98b1315
3：node01上面执行如下命令
mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown $(id -u):$(id -g) $HOME/.kube/config
4：kubeadm生成证书密码文件分发到node02和node03上面去
scp -r /etc/kubernetes/pki node03:/etc/kubernetes/scp -r /etc/kubernetes/pki node02:/etc/kubernetes/
5：部署flannel网络，只需要在node01执行就行
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml#版本信息：quay.io/coreos/flannel:v0.10.0-amd64kubectl create -f kube-flannel.yml
执行命令
[root@node01 ~]# kubectl get nodeNAME STATUS ROLES AGE VERSION node01 Ready master 31m v1.10.0
[root@node01 ~]# kubectl get pods --all-namespacesNAMESPACE NAME READY STATUS RESTARTS AGE kube-system coredns-7997f8864c-4x7mg 1/1 Running 0 29mkube-system coredns-7997f8864c-zfcck 1/1 Running 0 29mkube-system kube-apiserver-node01 1/1 Running 0 29mkube-system kube-controller-manager-node01 1/1 Running 0 30mkube-system kube-flannel-ds-hw2xb 1/1 Running 0 1mkube-system kube-proxy-s265b 1/1 Running 0 29mkube-system kube-scheduler-node01 1/1 Running 0 30m
6：部署dashboard
kubectl create -f kubernetes-dashboard.yaml
获取token,通过令牌登陆
kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
通过firefox访问dashboard，输入token,即可登陆
https://192.168.150.181:30000/#!/login
kubernetes-dashboard.yaml文件内容如下
# Copyright 2017 The Kubernetes Authors.## Licensed under the Apache License, Version 2.0 (the "License");# you may not use this file except in compliance with the License.# You may obtain a copy of the License at## http://www.apache.org/licenses/LICENSE-2.0## Unless required by applicable law or agreed to in writing, software# distributed under the License is distributed on an "AS IS" BASIS,# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.# See the License for the specific language governing permissions and# limitations under the License.# Configuration to deploy release version of the Dashboard UI compatible with# Kubernetes 1.8.## Example usage: kubectl create -f <this_file># ------------------- Dashboard Secret ------------------- #apiVersion: v1
kind: Secretmetadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-certs namespace: kube-system
type: Opaque---# ------------------- Dashboard Service Account ------------------- #apiVersion: v1
kind: ServiceAccountmetadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard namespace: kube-system---# ------------------- Dashboard Role & Role Binding ------------------- #kind: RoleapiVersion: rbac.authorization.k8s.io/v1
metadata:name: kubernetes-dashboard-minimal namespace: kube-system
rules:# Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.- apiGroups: [""]resources: ["secrets"]verbs: ["create"]# Allow Dashboard to create 'kubernetes-dashboard-settings' config map.- apiGroups: [""]resources: ["configmaps"]verbs: ["create"]# Allow Dashboard to get, update and delete Dashboard exclusive secrets.- apiGroups: [""]resources: ["secrets"]resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs"]verbs: ["get", "update", "delete"]# Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.- apiGroups: [""]resources: ["configmaps"]resourceNames: ["kubernetes-dashboard-settings"]verbs: ["get", "update"]# Allow Dashboard to get metrics from heapster.- apiGroups: [""]resources: ["services"]resourceNames: ["heapster"]verbs: ["proxy"]- apiGroups: [""]resources: ["services/proxy"]resourceNames: ["heapster", "http:heapster:", "https:heapster:"]verbs: ["get"]---apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBindingmetadata:name: kubernetes-dashboard-minimal namespace: kube-system
roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: kubernetes-dashboard-minimal
subjects:- kind: ServiceAccountname: kubernetes-dashboard namespace: kube-system---# ------------------- Dashboard Deployment ------------------- #kind: DeploymentapiVersion: apps/v1beta2
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard namespace: kube-system
spec:replicas: 1revisionHistoryLimit: 10selector:matchLabels:k8s-app: kubernetes-dashboard template:metadata:labels:k8s-app: kubernetes-dashboardspec:nodeSelector:node-role.kubernetes.io/master: ""containers:- name: kubernetes-dashboardimage: registry.cn-hangzhou.aliyuncs.com/k8sth/kubernetes-dashboard-amd64:v1.8.3ports:- containerPort: 8443protocol: TCPargs:- --auto-generate-certificates # Uncomment the following line to manually specify Kubernetes API server Host# If not specified, Dashboard will attempt to auto discover the API server and connect# to it. Uncomment only if the default does not work.# - --apiserver-host=http://my-address:portvolumeMounts:- name: kubernetes-dashboard-certsmountPath: /certs# Create on-disk volume to store exec logs- mountPath: /tmpname: tmp-volumelivenessProbe:httpGet:scheme: HTTPSpath: /port: 8443initialDelaySeconds: 30timeoutSeconds: 30volumes:- name: kubernetes-dashboard-certssecret:secretName: kubernetes-dashboard-certs- name: tmp-volumeemptyDir: {}serviceAccountName: kubernetes-dashboard# Comment the following tolerations if Dashboard must not be deployed on mastertolerations:- key: node-role.kubernetes.io/mastereffect: NoSchedule---# ------------------- Dashboard Service ------------------- #kind: ServiceapiVersion: v1
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard namespace: kube-system
spec:type: NodePortports:- port: 443targetPort: 8443nodePort: 30000selector:k8s-app: kubernetes-dashboard---apiVersion: v1
kind: ServiceAccountmetadata:name: admin-user namespace: kube-system---apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBindingmetadata:name: admin-user
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: cluster-admin
subjects:- kind: ServiceAccountname: admin-user namespace: kube-system
7：安装heapster
[root@node01 ~]# kubectl create -f kube-heapster/influxdb/deployment.extensions "monitoring-grafana" created service "monitoring-grafana" created serviceaccount "heapster" created deployment.extensions "heapster" created service "heapster" created deployment.extensions "monitoring-influxdb" created service "monitoring-influxdb" created[root@node01 ~]# kubectl create -f kube-heapster/rbac/clusterrolebinding.rbac.authorization.k8s.io "heapster" created[root@node01 ~]# kubectl get pods --all-namespacesNAMESPACE NAME READY STATUS RESTARTS AGE kube-system coredns-7997f8864c-4x7mg 1/1 Running 0 1hkube-system coredns-7997f8864c-zfcck 1/1 Running 0 1hkube-system heapster-647b89cd4b-wmvmw 1/1 Running 0 39skube-system kube-apiserver-node01 1/1 Running 0 1hkube-system kube-controller-manager-node01 1/1 Running 0 1hkube-system kube-flannel-ds-hw2xb 1/1 Running 0 49mkube-system kube-proxy-s265b 1/1 Running 0 1hkube-system kube-scheduler-node01 1/1 Running 0 1hkube-system kubernetes-dashboard-7b44ff9b77-26fkj 1/1 Running 0 44mkube-system monitoring-grafana-74bdd98b7d-szvqg 1/1 Running 0 40skube-system monitoring-influxdb-55bbd4b96-95tw7 1/1 Running 0 40s
访问https://192.168.150.181:30000/#!/login即可看到监控信息
heapster文件信息
[root@node01 ~]# tree kube-heapster/kube-heapster/├── influxdb│ ├── grafana.yaml│ ├── heapster.yaml│ └── influxdb.yaml└── rbac └── heapster-rbac.yaml
grafana.yaml
apiVersion: extensions/v1beta1
kind: Deploymentmetadata:name: monitoring-grafana namespace: kube-system
spec:replicas: 1template:metadata:labels:task: monitoringk8s-app: grafanaspec:nodeSelector:node-role.kubernetes.io/master: ""containers:- name: grafanaimage: registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-grafana-amd64:v4.4.3imagePullPolicy: IfNotPresentports:- containerPort: 3000protocol: TCPvolumeMounts:- mountPath: /etc/ssl/certsname: ca-certificatesreadOnly: true- mountPath: /varname: grafana-storageenv:- name: INFLUXDB_HOSTvalue: monitoring-influxdb- name: GF_SERVER_HTTP_PORTvalue: "3000"# The following env variables are required to make Grafana accessible via# the kubernetes api-server proxy. On production clusters, we recommend# removing these env variables, setup auth for grafana, and expose the grafana# service using a LoadBalancer or a public IP.- name: GF_AUTH_BASIC_ENABLEDvalue: "false"- name: GF_AUTH_ANONYMOUS_ENABLEDvalue: "true"- name: GF_AUTH_ANONYMOUS_ORG_ROLEvalue: Admin- name: GF_SERVER_ROOT_URL# If you're only using the API Server proxy, set this value instead:# value: /api/v1/namespaces/kube-system/services/monitoring-grafana/proxyvalue: /volumes:- name: ca-certificateshostPath:path: /etc/ssl/certs - name: grafana-storageemptyDir: {}---apiVersion: v1
kind: Servicemetadata:labels:# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)# If you are NOT using this as an addon, you should comment out this line.kubernetes.io/cluster-service: 'true'kubernetes.io/name: monitoring-grafananame: monitoring-grafana namespace: kube-system
spec:# In a production setup, we recommend accessing Grafana through an external Loadbalancer# or through a public IP.# type: LoadBalancer# You could also use NodePort to expose the service at a randomly-generated port# type: NodePortports:- port: 80targetPort: 3000selector:k8s-app: grafana
heapster.yaml
apiVersion: v1 kind: ServiceAccountmetadata:name: heapster namespace: kube-system---apiVersion: extensions/v1beta1 kind: Deploymentmetadata:name: heapster namespace: kube-system spec:replicas: 1template:metadata:labels:task: monitoringk8s-app: heapsterspec:serviceAccountName: heapsternodeSelector:node-role.kubernetes.io/master: ""containers:- name: heapsterimage: registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-amd64:v1.4.2imagePullPolicy: IfNotPresentcommand:- /heapster- --source=kubernetes:https://kubernetes.default- --sink=influxdb:http://monitoring-influxdb.kube-system.svc:8086---apiVersion: v1 kind: Servicemetadata:labels:task: monitoring # For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)# If you are NOT using this as an addon, you should comment out this line.kubernetes.io/cluster-service: 'true'kubernetes.io/name: Heapstername: heapster namespace: kube-system spec:ports:- port: 80targetPort: 8082selector:k8s-app: heapster
influxdb.yaml
apiVersion: extensions/v1beta1
kind: Deploymentmetadata:name: monitoring-influxdb namespace: kube-system
spec:replicas: 1template:metadata:labels:task: monitoringk8s-app: influxdbspec:nodeSelector:node-role.kubernetes.io/master: ""containers:- name: influxdbimage: registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-influxdb-amd64:v1.3.3imagePullPolicy: IfNotPresentvolumeMounts:- mountPath: /dataname: influxdb-storagevolumes:- name: influxdb-storageemptyDir: {}
---
apiVersion: v1
kind: Service
metadata:labels:task: monitoring# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)# If you are NOT using this as an addon, you should comment out this line.kubernetes.io/cluster-service: 'true'kubernetes.io/name: monitoring-influxdbname: monitoring-influxdb namespace: kube-system
spec:ports:- port: 8086targetPort: 8086selector:k8s-app: influxdb
heapster-rbac.yaml
kind: ClusterRoleBindingapiVersion: rbac.authorization.k8s.io/v1beta1 metadata:name: heapster roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: system:heapster subjects:- kind: ServiceAccountname: heapster namespace: kube-system
9：在node02和node03上面分别执行初始化
kubeadm init --config config.yaml#初始化的结果和node01的结果完全一样mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
10：查看节点信息
[root@node01 ~]# kubectl get nodesNAME STATUS ROLES AGE VERSION node01 Ready master 1h v1.10.0node02 Ready master 1h v1.10.0node03 Ready master 1h v1.10.0
[root@node01 ~]# kubectl get pods --all-namespaces -o wideNAMESPACE NAME READY STATUS RESTARTS AGE IP NODE kube-system coredns-7997f8864c-lwtfl 1/1 Running 0 1h 10.244.2.2 node03 kube-system coredns-7997f8864c-q2z9d 1/1 Running 0 1h 10.244.2.3 node03 kube-system kube-apiserver-node01 1/1 Running 0 36m 192.168.150.181 node01 kube-system kube-apiserver-node02 1/1 Running 0 36m 192.168.150.182 node02 kube-system kube-apiserver-node03 1/1 Running 0 1h 192.168.150.183 node03 kube-system kube-controller-manager-node01 1/1 Running 0 36m 192.168.150.181 node01 kube-system kube-controller-manager-node02 1/1 Running 0 36m 192.168.150.182 node02 kube-system kube-controller-manager-node03 1/1 Running 0 1h 192.168.150.183 node03 kube-system kube-flannel-ds-2xrbm 1/1 Running 0 40m 192.168.150.181 node01 kube-system kube-flannel-ds-7gf89 1/1 Running 0 40m 192.168.150.182 node02 kube-system kube-flannel-ds-fmk5z 1/1 Running 0 40m 192.168.150.183 node03 kube-system kube-proxy-dj4c7 1/1 Running 0 1h 192.168.150.181 node01 kube-system kube-proxy-lsg47 1/1 Running 0 1h 192.168.150.183 node03 kube-system kube-proxy-s5wrf 1/1 Running 0 1h 192.168.150.182 node02 kube-system kube-scheduler-node01 1/1 Running 0 36m 192.168.150.181 node01 kube-system kube-scheduler-node02 1/1 Running 0 36m 192.168.150.182 node02 kube-system kube-scheduler-node03 1/1 Running 0 1h 192.168.150.183 node03
11：让master也运行pod（默认master不运行pod）
kubectl taint nodes --all node-role.kubernetes.io/master-
八：添加node04节点到集群
在node04节点执行如下命令，即可将节点添加进集群
kubeadm join 192.168.150.186:6443 --token b99a00.a144ef80536d4344 --discovery-token-ca-cert-hash sha256:f79b68fb698c92b9336474eb3bf184e847f967dc58a6296911892662b98b1315
[root@node01 ~]# kubectl get nodeNAME STATUS ROLES AGE VERSION node01 Ready master 45m v1.10.0node02 Ready master 15m v1.10.0node03 Ready master 14m v1.10.0node04 Ready <none> 13m v1.10.0
参考文档：https://github.com/cookeem/kubeadm-ha/blob/master/README_CN.md
转载于:https://blog.51cto.com/13833333/2133226
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