20201117 docker swarm (一)

課堂資訊

GitHub - twtrubiks/docker-swarm-tutorial: Docker Swarm 基本教學 - 從無到有 Docker-Swarm-Beginners-Guide📝GitHub

自由軟體系統應用筆記 | 自由軟體系統應用kawsing.gitbook.io

新增虛擬機

設定虛擬機 hostname

hostnamectl set-hostname [虛擬機名稱]

bash

ifconfig

vim /etc/hosts

192.168.8.129 vm1
192.168.8.130 vm2
192.168.8.131 vm3

vm1

vm2

vm3

Docker Swarm

docker swarm 中，主要的就是 managers and workers

docker swarm 內建的 Loan Balance + Routing Mesh會將 request route 到正在運行的 container 上

課堂練習

Docker Swarm

check firewall

systemctl status firewalld

getenforce

vm1

初始化 docker swarm

docker swarm init --advertise-addr 192.168.8.129

複製到vm2、vm3

docker swarm join --token SWMTKN-1-3yzvicajz4c2kyohfzr8zpzuu7jw17jtxz2wf7k2d12nwvq4av-0l3b8c5vwsy12x6m1gupxwuf6 192.168.8.129:2377

docker node ls

docker swarm join-token manager

執行時會顯示 token

docker swarm join --token SWMTKN-1-3yzvicajz4c2kyohfzr8zpzuu7jw17jtxz2wf7k2d12nwvq4av-96ni9b32xo6ngxyscud232nqo 192.168.8.129:2377

將vm2promote 為 manager

docker node promote vm2

離開 swarm

docker swarm leave -f

Update a node

docker node update --availability drain vm1

docker pull dockersamples/visualizer

docker run -itd -p 8888:8080 -e HOST=192.168.8.129 -e PORT=8080 -v /var/run/docker.sock:/var/run/docker.sock --name visualizer dockersamples/visualizer

部署Web服務器服務

docker service create --name myweb -p 8880:80 httpd

docker service ls

兩個容器之間擴展Web服務器服務

docker service scale myweb=5

docker service scale myweb=3

docker node update --availability active vm1

docker service scale myweb=5

docker service scale myweb=1

docker service ps myweb

docker network ls

docker network inspect [ingress_NetworkID]

docker ps

docker inspect [httpd_容器ID]

docker service ls

docker service ps myweb

移除 service

docker service rm myweb

docker service ls

docker service create --name myweb httpd

更新 service

docker service update --publish-add [8880:80] [myweb]

docker service inspect [serviceID]

查看 service 的 log

docker service logs [serviceID]

docker service logs -f [serviceID]

vm2

vm3