Docker进阶Swarm、Stack、Secret、Config_有勇气的牛排

未知 02-07 1576

文章目录 1 Swarm介绍1.1 Warm文档1.2 工作模式1.3 购买服务器 2 搭建集群3 Raft协议4 弹性、扩缩容、集群Docker StackDocker Secret

1 Swarm介绍

安装docker https://blog.csdn.net/zx77588023/article/details/122652560

1.1 Warm文档

https://docs.docker.com/config/daemon/prometheus/

Run your app in production -> Configure containers -> Scale your app

1.2 工作模式

Raft：一致性算法

1.3 购买服务器

集群 2主2从

2 搭建集群 [root@VM-0-14-centos ~]# docker swarm --help Usage: docker swarm COMMAND Manage Swarm Commands: ca Display and rotate the root CA init Initialize a swarm join Join a swarm as a node and/or manager join-token Manage join tokens leave Leave the swarm unlock Unlock swarm unlock-key Manage the unlock key update Update the swarm Run 'docker swarm COMMAND --help' for more information on a command. [root@VM-0-14-centos ~]# docker swarm init --help Usage: docker swarm init [OPTIONS] Initialize a swarm Options: --advertise-addr string # 广播地址 Advertised address (format: <ip|interface>[:port]) --autolock Enable manager autolocking (requiring an unlock key to start a stopped manager) --availability string Availability of the node ("active"|"pause"|"drain") (default "active") --cert-expiry duration Validity period for node certificates (ns|us|ms|s|m|h) (default 2160h0m0s) --data-path-addr string Address or interface to use for data path traffic (format: <ip|interface>) --data-path-port uint32 Port number to use for data path traffic (1024 - 49151). If no value is set or is set to 0, the default port (4789) is used. --default-addr-pool ipNetSlice default address pool in CIDR format (default []) --default-addr-pool-mask-length uint32 default address pool subnet mask length (default 24) --dispatcher-heartbeat duration Dispatcher heartbeat period (ns|us|ms|s|m|h) (default 5s) --external-ca external-ca Specifications of one or more certificate signing endpoints --force-new-cluster Force create a new cluster from current state --listen-addr node-addr Listen address (format: <ip|interface>[:port]) (default 0.0.0.0:2377) --max-snapshots uint Number of additional Raft snapshots to retain --snapshot-interval uint # 快照 Number of log entries between Raft snapshots (default 10000) --task-history-limit int Task history retention limit (default 5) # 初始化主节点 docker swarm init # 加入一个节点（管理者、worker） docker swarm join # 获取令牌 docker swarm join-token manager # 生成加入 manager节点命令 docker swarm join-token worker # 生成加入 worker 节点命令

将dokcer1设置为主节点

docker swarm init --advertise-addr 172.27.0.6

docker2加入1节点

docker swarm join --token SWMTKN-1-6b1kbshfye331k4d86az2ohqvdwlj1bijsbka6hvb8h5ha4n28-e61bl5kpo7c1jbaj4hj8nizv1 172.27.0.6:2377

主节点查看所有节点

docker node ls 3 Raft协议

双主双从：假设一个节点挂了！其他节点是否可以用: 不可用 Raft协议：保证大多数接待存货才可以用、只要>1，集群至少大于3台

关闭docker：测试挂机

systemctl stop docker

退出集群

docker swarm leave

故：至少3个主节点多于1台机器存货

4 弹性、扩缩容、集群

docker-compose up：启动一个项目。单机

集群：swarm docker service

容器 => 服务 => 副本

帮助

[root@VM-0-6-centos ~]# docker service --help Usage: docker service COMMAND Manage services Commands: create 创建一个 new service inspect 查看services细节 logs 查看service日志 ls List services ps List the tasks of one or more services rm Remove one or more services rollback Revert changes to a service's configuration scale 动态扩缩容 Scale one or multiple replicated services update 更行service Run 'docker service COMMAND --help' for more information on a command.

启动服务

docker service create -p 8888:80 --name my-nginx nginx docker run 容器启动！不具有扩缩容 docker service 服务！具有扩缩容，滚动更新

查看服务

# REPLICAS：副本数目 docker service ps ls docker service ps my-nginx # 查看服务元数据 docker service inspect my0nginx

更新副本数量

docker service update --replicas 5 my-nginx 或 docker service scale my-nginx=5

调整service 以什么方式运行

dcoker service create --mode replicated --name mytom tomcat:7 docker service create --mode global --name haha alpine ping baidu.com Docker Stack # 单机 docker-compose up -d wordpress.yaml # 集群 docker-stack deploy wordpress.yaml Docker Secret

学习地址： https://·/video/BV1kv411q7Qc