BlueXIII

Technical note

DockerSwarm运维

阅读
Docker

参考文档

测试机

10.193.10.201 10.193.10.202 10.193.10.203

安装Docker

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce-19.03.13 docker-ce-cli-19.03.13 containerd.io
docker --version
systemctl enable docker
systemctl start docker
systemctl daemon-reload
systemctl status docker

部署Swarm

# 初始化主节点
docker swarm init --advertise-addr 10.193.10.201

# 再次查看token
docker swarm join-token worker

# 加入主节点
docker swarm join --token SWMTKN-1-5ijp838v2gjyq0v85bl2reiptw7qk8cj7verfgjrfb97nun8yd-1215mjt92g7ahl7jnuyoxmpq1 10.193.10.201:2377

# 查看节点
docker node ls

部署应用

# 部署应用
docker service create --replicas 1 --name helloworld alpine ping baidu.com

# 查看服务
docker service ls

# 查看服务的详细信息
docker service inspect --pretty helloworld

# 查看服务在哪些节点运行
docker service ps helloworld

# 删除服务
docker service rm helloworld

更新服务

# 部署一个redis服务
docker service create \
--replicas 3 \
--name redis \
--update-delay 10s \
redis:3.0.6

# 更新服务
docker service update --image redis:3.0.7 redis
docker service update redis

排除节点

# 排除节点
docker node update --availability drain playground03

# 重新激活节点
docker node update --availability active playground03

# 删除节点(慎用)
docker node rm --force playground03

# 强制平衡节点
docker service update helloworld --force

端口映射

https://holynull.gitbooks.io/docker-swarm/content/kai-shi-shi-yong-swarm/swarmmo-shi-duan-kou-lu-you.html

docker service create \
--name my-web \
--publish published=8080,target=80 \
--replicas 2 \
nginx

docker service inspect --format="{{json .Endpoint.Spec.Ports}}" my-web

测试:
http://10.193.10.201:8080 http://10.193.10.202:8080 http://10.193.10.203:8080

Stack

https://docs.docker.com/engine/reference/commandline/stack_deploy/ https://www.jianshu.com/p/25c529e3a3e6

# 部署服务
docker stack deploy -c docker-compose.yml wordpress

# 查看服务
docker stack ls
docker stack ps swarmpit
docker stack services swarmpit

# 移除
docker stack rm xxx

网络

https://zhuanlan.zhihu.com/p/129258067

# 查询网络
docker network ls

# 创建网络
docker network create --driver overlay swarmnetwork

绑定多个节点

# 为多个节点添加标签
docker node update --label-add h5=true playground01
docker node update --label-add h5=true playground02

# 绑定标签
vi compose.yml
deploy:
  placement:
    constraints: [node.labels.h5 == true]

CPU/MEM限制

# 查看本节点统计信息
docker stats 

# 查看service状态
docker service inspect --pretty admin_admin-service

# 查看所有节点service状态(先配置互信)
docker node ls | cut -c 31-49 | grep -v HOSTNAME | xargs -I"SERVER" sh -c "echo SERVER; ssh SERVER docker stats --no-stream"

# CPU/MEM保留
docker service update --reserve-cpu 2 --reserve-memory 512m h5-test_web-service  

# CPU/MEM限制
docker service update --limit-cpu 2 --limit-memory 512m h5-test_web-service  

# 去除保留与限制
docker service update --limit-cpu 0 --limit-memory 0 --reserve-cpu 0 --reserve-memory 0 h5-test_web-service

服务伸缩

# 服务伸缩
docker service scale admin_admin-service=5

# 查看服务状态
docker service ps admin_admin-service

查看service日志

docker service logs -f --tail 0 hphz-es-service_bridge-service

常用操作

docker node ls

docker node inspect host101 --format '{{ .Status.Addr  }}'
docker service inspect --format="{{json .Endpoint.Spec.Ports}}" my-web

docker node inspect --pretty artiServer

docker service ls
docker service inspect --pretty bridge-service_bridge-service
docker service ps bridge-service_bridge-service

docker service scale helloworld=5

docker service update bridge-service_bridge-service --force

docker service scale hphz-es-service_bridge-service=1

docker stack rm h5-test-mazq

docker service logs -f --tail 10 hphz-es-service-temp_bridge-service-temp

docker stack rm hphz-es-service-temp
export SERVICES_hphz_es_SERVICE_IMAGE=artifactory.sdecloud.com:8443/docker-local/hphz-es:RELEASE-1.197
docker stack deploy -c hphz-es-service-temp.yml hphz-es-service-temp --with-registry-auth