a note when using docker locally

• when building the getting-started application provided by official site, I got a error saying, 

  #0 138.4 node-pre-gyp ERR! install request to https://github.com/TryGhost/node-sqlite3/releases/download/v5.1.2/napi-v6-linux-musl-x64.tar.gz failed, reason: socket hang up 
  

  it's normal in China that downloading files from github, so I changed the hosts file as below to acceralte the downloading.
  • get ip for fastly.net
  • get cdn for github
  • modify hosts

    # github
    151.101.1.194 github.global.ssl.fastly.net
    140.82.114.3 github.com
    

• deploy a mysql locally

  sudo docker pull mysql
  sudo docker run --name mysql -e MYSQL_ROOT_PASSWORD=password -d mysql
  sudo docker exec -it mysql bash
  
  bash-4.4# mysql -u root -p
  Enter password: 
  

note: the initial user is 'root' and password is the one you set when running this container.

another connection to mysql(I use network in this case)
issue reference

$ sudo docker network create mysql-net
# start an instance of mysql
$ sudo docker run --network mysql-net --name mysql8 -e MYSQL_ROOT_PASSWORD=password -d mysql
# connect to mysql
$ sudo docker run --network mysql-net -it --rm mysql mysql -hmysql8 -uroot -p

• mysql 8.0.33 docker image misses some command like mysqlbinlog
  the community hasn't agree on this. so I use debian instead of oracle(which is latest).
  $ sudo docker pull mysql:debian

  $ sudo docker run --name mysql-debian -e MYSQL_ROOT_PASSWORD=password -d mysql:debian
  anna@anna-KPRC-WX0:~$ sudo docker ps
  CONTAINER ID   IMAGE          COMMAND                  CREATED             STATUS             PORTS                 NAMES
  4b3059437cfa   mysql:debian   "docker-entrypoint.s…"   19 seconds ago      Up 18 seconds      3306/tcp, 33060/tcp   mysql-debian
  2fccb5f7ea80   mysql          "docker-entrypoint.s…"   About an hour ago   Up About an hour   3306/tcp, 33060/tcp   mysql8
  anna@anna-KPRC-WX0:~$ sudo docker exec -it mysql-debian bash
  root@4b3059437cfa:/# which mysqlbinlog
  /usr/bin/mysqlbinlog
  
  

• check the image info(e.g. tag) in docker repository
  curl -L -s 'https://registry.hub.docker.com/v2/repositories/library/mysql/tags?page_size=1024'

• start a container as a mysql slave
  write a mysql.cnf for slave and mount the volumn

  sudo docker run -p 3302:3306 --name mysql-slave -e MYSQL_ROOT_PASSWORD=password -d mysql:debian -v abs_path_to_conf:/etc/mysql/conf.d
  

• change network config for a docker which has already been running.

  • stop docker
    systemctl stop docker
  • modify config file /var/lib/docker/containers/<container_id>/hostconfig.json

    "PortBindings":{
    "3306/tcp":[
    	{
    	"HostIp":"",
    	"HostPort":"3306"
    	}
    ]
    }
    

  • start docker and container
    systemctl start docker & sudo docker start <container_id>

• redis

  $ sudo docker ps -a

  35205d9a83a3   redis                                                  "docker-entrypoint.s…"   5 months ago   Exited (255) 2 weeks ago   0.0.0.0:6379->6379/tcp, :::6379->6379/tcp              redis7
  

  $ sudo docker start 35205d9a83a3
  $ sudo docker exec -it redis7 bash

  using redis-cli
  root@35205d9a83a3:/data# redis-cli
  127.0.0.1:6379> 
  

aliyun experience

today I applied an vps on aliyun, keep a note on installation of docker-compose.
since you network is way too slow, official commad executed too slow.

$ curl -SL https://github.com/docker/compose/releases/download/v2.24.5/docker-compose-linux-x86_64 -o /usr/local/bin/docker-compose

I can't find another more efficient way in short time than move the same file to remote server and continue to the following core opporations.

config image source of ali

find your accelarating address via https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors like below. it's free, btw.

and then check the 'registry mirrors' with

$ docker info

however, the speed is not fast as expected ater configuration. so I export the local images and import them on remote side.

$ sudo docker export bb0b00919cf1 > **.tar
$ docker import - pg-vecotr < pg-vector.tar

check images:

$ docker images

if the size is larger than 500, which is the limitation on aliyun,

$ split -b 400m mongo.tar -d mongo.tar. #-b block size, -d digital, mongo.tar. prefix