摘要:一环境二安装配置免密登录,配置节点所需镜像的文件由于某些镜像国内无法访问需要现将镜像通过代理下载到本地然后上传到本地镜像仓库或,同时修改配置文件,个别组件存放位置,需要新建服务器分发文件。文章转载自公众号北京爷们儿
K8s和TiDB都是目前开源社区中活跃的开源产品,TiDB一、环境
Operator项目是一个在K8s上编排管理TiDB集群的项目。本文详细记录了部署K8s及install TiDB
Operator的详细实施过程,希望能对刚"入坑"的同学有所帮助。
Ubuntu 16.04
K8s 1.14.1
1 yum -y install expect
vi /tmp/autocopy.exp
1 #!/usr/bin/expect 2 3 set timeout 4 set user_hostname [lindex $argv ] 5 set password [lindex $argv ] 6 spawn ssh-copy-id $user_hostname 7 expect { 8 "(yes/no)?" 9 { 10 send "yes " 11 expect "*assword:" { send "$password "} 12 } 13 "*assword:" 14 { 15 send "$password " 16 } 17 } 18 expect eof
1 ssh-keyscan addedip >> ~/.ssh/known_hosts 2 3 ssh-keygen -t rsa -P "" 4 5 for i in 10.0.0.{31,32,33,40,10,20,50}; do ssh-keyscan $i >> ~/.ssh/known_hosts ; done 6 7 /tmp/autocopy.exp root@addeip 8 ssh-copy-id addedip 9 10 /tmp/autocopy.exp root@10.0.0.31 11 /tmp/autocopy.exp root@10.0.0.32 12 /tmp/autocopy.exp root@10.0.0.33 13 /tmp/autocopy.exp root@10.0.0.40 14 /tmp/autocopy.exp root@10.0.0.10 15 /tmp/autocopy.exp root@10.0.0.20 16 /tmp/autocopy.exp root@10.0.0.50配置Kubespray
1 pip install -r requirements.txt 2 cp -rfp inventory/sample inventory/mycluster
inventory/mycluster/inventory.ini
inventory/mycluster/inventory.ini
1 # ## Configure "ip" variable to bind kubernetes services on a 2 # ## different ip than the default iface 3 # ## We should set etcd_member_name for etcd cluster. The node that is not a etcd member do not need to set the value, or can set the empty string value. 4 [all] 5 # node1 ansible_host=95.54.0.12 # ip=10.3.0.1 etcd_member_name=etcd1 6 # node2 ansible_host=95.54.0.13 # ip=10.3.0.2 etcd_member_name=etcd2 7 # node3 ansible_host=95.54.0.14 # ip=10.3.0.3 etcd_member_name=etcd3 8 # node4 ansible_host=95.54.0.15 # ip=10.3.0.4 etcd_member_name=etcd4 9 # node5 ansible_host=95.54.0.16 # ip=10.3.0.5 etcd_member_name=etcd5 10 # node6 ansible_host=95.54.0.17 # ip=10.3.0.6 etcd_member_name=etcd6 11 etcd1 ansible_host=10.0.0.31 etcd_member_name=etcd1 12 etcd2 ansible_host=10.0.0.32 etcd_member_name=etcd2 13 etcd3 ansible_host=10.0.0.33 etcd_member_name=etcd3 14 master1 ansible_host=10.0.0.40 15 node1 ansible_host=10.0.0.10 16 node2 ansible_host=10.0.0.20 17 node3 ansible_host=10.0.0.50 18 19 # ## configure a bastion host if your nodes are not directly reachable 20 # bastion ansible_host=x.x.x.x ansible_user=some_user 21 22 [kube-master] 23 # node1 24 # node2 25 master1 26 [etcd] 27 # node1 28 # node2 29 # node3 30 etcd1 31 etcd2 32 etcd3 33 34 [kube-node] 35 # node2 36 # node3 37 # node4 38 # node5 39 # node6 40 node1 41 node2 42 node3 43 44 [k8s-cluster:children] 45 kube-master 46 kube-node节点所需镜像的文件
由于某些镜像国内无法访问需要现将镜像通过代理下载到本地然后上传到本地镜像仓库或DockerHub,同时修改配置文件,个别组件存放位置https://storage.googleapis.com,需要新建Nginx服务器分发文件。
建立Nginx服务器
~/distribution/docker-compose.yml
创建文件目录及Nginx配置文件目录
~/distribution/conf.d/open_distribute.conf
启动
下载并上传所需文件 具体版本号参考roles/download/defaults/main.yml文件中kubeadm_version、kube_version、image_arch参数
安装Docker及Docker-Compose
1 apt-get install 2 apt-transport-https 3 ca-certificates 4 curl 5 gnupg-agent 6 software-properties-common 7 8 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - 9 10 add-apt-repository 11 "deb [arch=amd64] https://download.docker.com/linux/ubuntu 12 $(lsb_release -cs) 13 stable" 14 15 apt-get update 16 17 apt-get install docker-ce docker-ce-cli containerd.io 18 19 chmod +x /usr/local/bin/docker-compose 20 sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
新建Nginx docker-compose.yml
1 mkdir ~/distribution 2 vi ~/distribution/docker-compose.yml
1 # distribute 2 version: "2" 3 services: 4 distribute: 5 image: nginx:1.15.12 6 volumes: 7 - ./conf.d:/etc/nginx/conf.d 8 - ./distributedfiles:/usr/share/nginx/html 9 network_mode: "host" 10 container_name: nginx_distribute
1 mkdir ~/distribution/distributedfiles 2 mkdir ~/distribution/ 3 mkdir ~/distribution/conf.d 4 vi ~/distribution/conf.d/open_distribute.conf
1 #open_distribute.conf 2 3 server { 4 #server_name distribute.search.leju.com; 5 listen 8888; 6 7 root /usr/share/nginx/html; 8 9 add_header Access-Control-Allow-Origin *; 10 add_header Access-Control-Allow-Headers X-Requested-With; 11 add_header Access-Control-Allow-Methods GET,POST,OPTIONS; 12 13 location / { 14 # index index.html; 15 autoindex on; 16 } 17 expires off; 18 location ~ .*.(gif|jpg|jpeg|png|bmp|swf|eot|ttf|woff|woff2|svg)$ { 19 expires -1; 20 } 21 22 location ~ .*.(js|css)?$ { 23 expires -1 ; 24 } 25 } # end of public static files domain : [ distribute.search.leju.com ]
1 docker-compose up -d
1 wget https://storage.googleapis.com/kubernetes-release/release/v1.14.1/bin/linux/amd64/kubeadm 2 3 scp /tmp/kubeadm 10.0.0.60:/root/distribution/distributedfiles 4 5 wget https://storage.googleapis.com/kubernetes-release/release/v1.14.1/bin/linux/amd64/hyperkube
需要下载并上传到私有仓库的镜像
1 docker pull k8s.gcr.io/cluster-proportional-autoscaler-amd64:1.4.0 2 docker tag k8s.gcr.io/cluster-proportional-autoscaler-amd64:1.4.0 jiashiwen/cluster-proportional-autoscaler-amd64:1.4.0 3 docker push jiashiwen/cluster-proportional-autoscaler-amd64:1.4.0 4 5 docker pull k8s.gcr.io/k8s-dns-node-cache:1.15.1 6 docker tag k8s.gcr.io/k8s-dns-node-cache:1.15.1 jiashiwen/k8s-dns-node-cache:1.15.1 7 docker push jiashiwen/k8s-dns-node-cache:1.15.1 8 9 docker pull gcr.io/google_containers/pause-amd64:3.1 10 docker tag gcr.io/google_containers/pause-amd64:3.1 jiashiwen/pause-amd64:3.1 11 docker push jiashiwen/pause-amd64:3.1 12 13 docker pull gcr.io/google_containers/kubernetes-dashboard-amd64:v1.10.1 14 docker tag gcr.io/google_containers/kubernetes-dashboard-amd64:v1.10.1 jiashiwen/kubernetes-dashboard-amd64:v1.10.1 15 docker push jiashiwen/kubernetes-dashboard-amd64:v1.10.1 16 17 docker pull gcr.io/google_containers/kube-apiserver:v1.14.1 18 docker tag gcr.io/google_containers/kube-apiserver:v1.14.1 jiashiwen/kube-apiserver:v1.14.1 19 docker push jiashiwen/kube-apiserver:v1.14.1 20 21 docker pull gcr.io/google_containers/kube-controller-manager:v1.14.1 22 docker tag gcr.io/google_containers/kube-controller-manager:v1.14.1 jiashiwen/kube-controller-manager:v1.14.1 23 docker push jiashiwen/kube-controller-manager:v1.14.1 24 25 docker pull gcr.io/google_containers/kube-scheduler:v1.14.1 26 docker tag gcr.io/google_containers/kube-scheduler:v1.14.1 jiashiwen/kube-scheduler:v1.14.1 27 docker push jiashiwen/kube-scheduler:v1.14.1 28 29 docker pull gcr.io/google_containers/kube-proxy:v1.14.1 30 docker tag gcr.io/google_containers/kube-proxy:v1.14.1 jiashiwen/kube-proxy:v1.14.1 31 docker push jiashiwen/kube-proxy:v1.14.1 32 33 docker pull gcr.io/google_containers/pause:3.1 34 docker tag gcr.io/google_containers/pause:3.1 jiashiwen/pause:3.1 35 docker push jiashiwen/pause:3.1 36 37 docker pull gcr.io/google_containers/coredns:1.3.1 38 docker tag gcr.io/google_containers/coredns:1.3.1 jiashiwen/coredns:1.3.1 39 docker push jiashiwen/coredns:1.3.1
用于下载上传镜像的脚本
1 #!/bin/bash 2 3 privaterepo=jiashiwen 4 5 k8sgcrimages=( 6 cluster-proportional-autoscaler-amd64:1.4.0 7 k8s-dns-node-cache:1.15.1 8 ) 9 10 gcrimages=( 11 pause-amd64:3.1 12 kubernetes-dashboard-amd64:v1.10.1 13 kube-apiserver:v1.14.1 14 kube-controller-manager:v1.14.1 15 kube-scheduler:v1.14.1 16 kube-proxy:v1.14.1 17 pause:3.1 18 coredns:1.3.1 19 ) 20 21 22 for k8sgcrimageName in ${k8sgcrimages[@]} ; do 23 echo $k8sgcrimageName 24 docker pull k8s.gcr.io/$k8sgcrimageName 25 docker tag k8s.gcr.io/$k8sgcrimageName $privaterepo/$k8sgcrimageName 26 docker push $privaterepo/$k8sgcrimageName 27 done 28 29 30 for gcrimageName in ${gcrimages[@]} ; do 31 echo $gcrimageName 32 docker pull gcr.io/google_containers/$gcrimageName 33 docker tag gcr.io/google_containers/$gcrimageName $privaterepo/$gcrimageName 34 docker push $privaterepo/$gcrimageName 35 done
修改文件inventory/mycluster/group_vars/k8s-cluster/k8s-cluster.yml,修改K8s镜像仓库
1 # kube_image_repo: "gcr.io/google-containers" 2 kube_image_repo: "jiashiwen"
修改roles/download/defaults/main.yml
1 #dnsautoscaler_image_repo: "k8s.gcr.io/cluster-proportional-autoscaler-{{ image_arch }}" 2 dnsautoscaler_image_repo: "jiashiwen/cluster-proportional-autoscaler-{{ image_arch }}" 3 4 #kube_image_repo: "gcr.io/google-containers" 5 kube_image_repo: "jiashiwen" 6 7 #pod_infra_image_repo: "gcr.io/google_containers/pause-{{ image_arch }}" 8 pod_infra_image_repo: "jiashiwen/pause-{{ image_arch }}" 9 10 #dashboard_image_repo: "gcr.io/google_containers/kubernetes-dashboard-{{ image_arch }}" 11 dashboard_image_repo: "jiashiwen/kubernetes-dashboard-{{ image_arch }}" 12 13 #nodelocaldns_image_repo: "k8s.gcr.io/k8s-dns-node-cache" 14 nodelocaldns_image_repo: "jiashiwen/k8s-dns-node-cache" 15 16 #kubeadm_download_url: "https://storage.googleapis.com/kubernetes-release/ release/{{ kubeadm_version }}/bin/linux/{{ image_arch }}/kubeadm" 17 kubeadm_download_url: "http://10.0.0.60:8888/kubeadm" 18 19 #hyperkube_download_url: "https://storage.googleapis.com/ kubernetes-release/release/{{ kube_version }}/bin/linux/{{ image_arch }}/ hyperkube" 20 hyperkube_download_url: "http://10.0.0.60:8888/hyperkube"三、执行安装
安装命令
1 ansible-playbook -i inventory/mycluster/inventory.ini cluster.yml
重置命令
1 ansible-playbook -i inventory/mycluster/inventory.ini reset.yml四、验证K8s集群
安装Kubectl
本地浏览器打开https://storage.googleapis.co...
用上一步得到的最新版本号v1.7.1替换下载地址中的$(curl -s https://storage.googleapis.co...:// storage.googleapis.com/kubernetes-release/release/v1.14.1/bin/linux/amd64/kubectl
上传下载好的kubectl
1 scp /tmp/kubectl root@xxx:/root
修改属性
1 chmod +x ./kubectl 2 mv ./kubectl /usr/local/bin/kubectl
Ubuntu
1 sudo snap install kubectl --classic
CentOS
将master节点上的~/.kube/config 文件复制到你需要访问集群的客户端上即可
1 scp 10.0.0.40:/root/.kube/config ~/.kube/config
执行命令验证集群
1 kubectl get nodes 2 kubectl cluster-info五、TiDB-Operaor部署
安装helm
https://blog.csdn.net/bbwangj...
安装helm
1 curl https://raw.githubusercontent.com/helm/helm/master/scripts/get > get_helm.sh 2 chmod 700 get_helm.sh 3 ./get_helm.sh
查看helm版本
1 helm version
初始化
1 helm init --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.13.1 --stable-repo-url https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts为K8s提供 local volumes
参考文档https://github.com/kubernetes...
tidb-operator启动会为pd和tikv绑定pv,需要在discovery directory下创建多个目录
格式化并挂载磁盘
1 mkfs.ext4 /dev/vdb 2 DISK_UUID=$(blkid -s UUID -o value /dev/vdb) 3 mkdir /mnt/$DISK_UUID 4 mount -t ext4 /dev/vdb /mnt/$DISK_UUID
/etc/fstab持久化mount
1 echo UUID=`sudo blkid -s UUID -o value /dev/vdb` /mnt/$DISK_UUID ext4 defaults 0 2 | sudo tee -a /etc/fstab
创建多个目录并mount到discovery directory
1 for i in $(seq 1 10); do 2 sudo mkdir -p /mnt/${DISK_UUID}/vol${i} /mnt/disks/${DISK_UUID}_vol${i} 3 sudo mount --bind /mnt/${DISK_UUID}/vol${i} /mnt/disks/${DISK_UUID}_vol${i} 4 done
/etc/fstab持久化mount
1 for i in $(seq 1 10); do 2 echo /mnt/${DISK_UUID}/vol${i} /mnt/disks/${DISK_UUID}_vol${i} none bind 0 0 | sudo tee -a /etc/fstab 3 done
为tidb-operator创建local-volume-provisioner
1 $ kubectl apply -f https://raw.githubusercontent.com/pingcap/tidb-operator/master/manifests/local-dind/local-volume-provisioner.yaml 2 $ kubectl get po -n kube-system -l app=local-volume-provisioner 3 $ kubectl get pv --all-namespaces | grep local-storage六、Install TiDB Operator
项目中使用了gcr.io/google-containers/hyperkube,国内访问不了,简单的办法是把镜像重新push到dockerhub然后修改charts/tidb-operator/values.yaml
1 scheduler: 2 # With rbac.create=false, the user is responsible for creating this account 3 # With rbac.create=true, this service account will be created 4 # Also see rbac.create and clusterScoped 5 serviceAccount: tidb-scheduler 6 logLevel: 2 7 replicas: 1 8 schedulerName: tidb-scheduler 9 resources: 10 limits: 11 cpu: 250m 12 memory: 150Mi 13 requests: 14 cpu: 80m 15 memory: 50Mi 16 # kubeSchedulerImageName: gcr.io/google-containers/hyperkube 17 kubeSchedulerImageName: yourrepo/hyperkube 18 # This will default to matching your kubernetes version 19 # kubeSchedulerImageTag: latest
TiDB Operator使用CRD扩展Kubernetes,因此要使用TiDB Operator,首先应该创建TidbCluster自定义资源类型。
1 kubectl apply -f https://raw.githubusercontent.com/pingcap/tidb-operator/master/manifests/crd.yaml 2 kubectl get crd tidbclusters.pingcap.com
安装TiDB-Operator
1 $ git clone https://github.com/pingcap/tidb-operator.git 2 $ cd tidb-operator 3 $ helm install charts/tidb-operator --name=tidb-operator --namespace=tidb-admin 4 $ kubectl get pods --namespace tidb-admin -l app.kubernetes.io/ instance=tidb-operator七、部署TiDB
1 helm install charts/tidb-cluster --name=demo --namespace=tidb 2 watch kubectl get pods --namespace tidb -l app.kubernetes.io/instance=demo -o wide八、验证 安装MySQL客户端
参考文档https://dev.mysql.com/doc/ref...
CentOS安装
1 wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm 2 yum localinstall mysql80-community-release-el7-3.noarch.rpm -y 3 yum repolist all | grep mysql 4 yum-config-manager --disable mysql80-community 5 yum-config-manager --enable mysql57-community 6 yum install mysql-community-client
Ubuntu安装
1 wget https://dev.mysql.com/get/mysql-apt-config_0.8.13-1_all.deb 2 dpkg -i mysql-apt-config_0.8.13-1_all.deb 3 apt update 4 5 # 选择MySQL版本 6 dpkg-reconfigure mysql-apt-config 7 apt install mysql-client -y九、映射TiDB端口
查看TiDB Service
1 kubectl get svc --all-namespaces
映射TiDB端口
1 # 仅本地访问 2 kubectl port-forward svc/demo-tidb 4000:4000 --namespace=tidb 3 4 # 其他主机访问 5 kubectl port-forward --address 0.0.0.0 svc/demo-tidb 4000:4000 --namespace=tidb
首次登录MySQL
1 mysql -h 127.0.0.1 -P 4000 -u root -D test
修改TiDB密码
1 SET PASSWORD FOR "root"@"%" = "wD3cLpyO5M"; FLUSH PRIVILEGES;
趟坑小记
1、K8s国内安装
K8s镜像多在gcr.io国内访问不到,基本做法是把镜像导入DockerHub或者私有镜像,这一点在K8s部署章节有详细过程就不累述了。
2、TiDB-Operator 本地存储配置
Operator在启动集群时pd和TiKV需要绑定本地存储如果挂载点不足会导致pod启动过程中找不到可已bond的pv始终处于pending或createing状态,详细配请参阅https://github.com/kubernetes...“Sharing a disk filesystem by multiple filesystem PVs”一节,同一块磁盘绑定多个挂载目录,为Operator提供足够的bond
3、MySQL客户端版本问题
目前TiDB只支持MySQL5.7版本客户端8.0会报ERROR 1105 (HY000): Unknown charset id 255
点击"K8s"了解更多详情。
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摘要:一环境二安装配置免密登录,配置节点所需镜像的文件由于某些镜像国内无法访问需要现将镜像通过代理下载到本地然后上传到本地镜像仓库或,同时修改配置文件,个别组件存放位置,需要新建服务器分发文件。文章转载自公众号北京爷们儿 K8s和TiDB都是目前开源社区中活跃的开源产品,TiDBOperator项目是一个在K8s上编排管理TiDB集群的项目。本文详细记录了部署K8s及install TiDB...
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