云环境下部署kubernetes1.19.0高可用集群

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 2021/01/12   Share

前言

准备环境

安装 ansible 配置免密

yum -y install sshpass ansible git

# 配置免密
for i in 1.1.1.1 1.1.1.107 1.1.1.246 1.1.1.151 1.1.1.32;do sshpass -p asdf3.14 ssh-copy-id  -o StrictHostKeyChecking=no  root@${i};done

# 写入hosts
for i in 1.1.1.1 1.1.1.107 1.1.1.246 1.1.1.151 1.1.1.32;do echo ${i} >> /etc/ansible/hosts;done


# 安装网络工具，最小化安装系统后网络工具需要手动安装
$ yum -y install net-tools
# 配置yum源（科学上网的同学可以把"mirrors.aliyun.com"替换为"packages.cloud.google.com"）
$ cat <<E0F > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
E0F

# 安装工具
# 找到要安装的版本号
$ 

# 安装指定版本（这里用的是1.17.0-0）
$ yum install -y kubeadm-1.17.0-0 kubelet-1.17.0-0 kubectl-1.17.0-0 --disableexcludes=kubernetes

# 设置kubelet的cgroupdriver（kubelet的cgroupdriver默认为systemd，如果上面没有设置docker的exec-opts为systemd，这里就需要将kubelet的设置为cgroupfs）【此处不需要执行，上面docker已经将cgroupdriver=systemd】
$ sed -i "s/cgroup-driver=systemd/cgroup-driver=cgroupfs/g" /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

# 开启自启动kubelet
$ systemctl enable kubelet && systemctl start kubelet

配置yum源

vim kubernetes.repo

[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg


# 如果服务器在海外,使用google的配置
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

分发镜像源

1	ansible all -m copy -a 'src=./kubernetes.repo dest=/etc/yum.repos.d/ mode=0644'

初始化节点

下载项目

1 2	git clone https://gitee.com/momom1/ansible_install_kubernetes.git cd ansible_install_kubernetes

替换 cluster.yaml 内容

- name: init node
  hosts: all
  roles:
  - role: init_node
  - role: container
  tags: [ init ]

执行
1
ansible-playbook cluster.yaml

安装 kubeadm

查看可以安装的版本

yum list kubeadm --showduplicates | sort -r
kubeadm.x86_64                       1.6.0-0                          kubernetes
kubeadm.x86_64                       1.20.2-0                         kubernetes
kubeadm.x86_64                       1.20.1-0                         kubernetes
kubeadm.x86_64                       1.20.0-0                         kubernetes
kubeadm.x86_64                       1.19.7-0                         kubernetes
kubeadm.x86_64                       1.19.6-0                         kubernetes

安装指定版本

# 安装
ansible all -m shell -a "yum install -y kubeadm-1.19.7-0 kubelet-1.19.7-0 kubectl-1.19.7-0 --disableexcludes=kubernetes"

# 开机启动kubelet
ansible all -m shell -a "systemctl enable --now kubelet"

使用kubeadm创建集群

使用下方内容
config.yaml

注意修改的是controlPlaneEndpoint, networking, clusterDNS

apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: 
  extraArgs:
    bind-address: 0.0.0.0
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.19.7
controlPlaneEndpoint: "10.10.66.172:8443"
networking:
  dnsDomain: cluster.local
  serviceSubnet: 10.254.0.0/16
  PodSubnet: 172.30.0.0/16
scheduler: 
  extraArgs:
    bind-address: 0.0.0.0
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
bindAddressHardFail: false
clientConnection:
  acceptContentTypes: ""
  burst: 0
  contentType: ""
  kubeconfig: /var/lib/kube-proxy/kubeconfig.conf
  qps: 0
clusterCIDR: "172.30.0.0/16"
configSyncPeriod: 0s
conntrack:
  maxPerCore: null
  min: null
  tcpCloseWaitTimeout: null
  tcpEstablishedTimeout: null
detectLocalMode: ""
enableProfiling: false
healthzBindAddress: ""
hostnameOverride: ""
iptables:
  masqueradeAll: false
  masqueradeBit: null
  minSyncPeriod: 0s
  syncPeriod: 0s
ipvs:
  excludeCIDRs: null
  minSyncPeriod: 0s
  scheduler: ""
  strictARP: false
  syncPeriod: 0s
  tcpFinTimeout: 0s
  tcpTimeout: 0s
  udpTimeout: 0s
kind: KubeProxyConfiguration
metricsBindAddress: ""
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: null
portRange: ""
showHiddenMetricsForVersion: ""
udpIdleTimeout: 0s
winkernel:
  enableDSR: false
  networkName: ""
  sourceVip: ""
---
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 0s
    cacheUnauthorizedTTL: 0s
cgroupDriver: systemd
clusterDNS:
- 10.254.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
logging: {}
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
rotateCertificates: true
runtimeRequestTimeout: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s

根据输出将其他节点加入集群

参考链接: calico

curl https://docs.projectcalico.org/manifests/calico.yaml -O
修改变量注释:
CALICO_IPV4POOL_CIDR
设置成你所选的Pod CIDR相同的值

kubectl apply -f calico.yyaml

原文作者：Momo

原文链接：https://mo.xmomo521.top/2021/01/12/云环境下部署kubernetes1-19-0高可用集群/

发表日期：January 12th 2021, 5:23:26 pm

更新日期：December 21st 2021, 3:32:58 pm

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CATALOG

1. 前言
2. 准备环境
1. 2.1. 安装 ansible 配置免密
2. 2.2. 配置yum源
3. 初始化节点
1. 3.1. 下载项目
4. 安装 kubeadm
1. 4.1. 查看可以安装的版本
2. 4.2. 安装指定版本
5. 使用kubeadm创建集群

