4. 初识 Docker

4.1. 介绍

4.3. image and compose

Dockerfile

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FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

docker build –build-arg JAR_FILE=target/springbootjar-0.0.1-SNAPSHOT.jar -t image_name .
docker run -d –name container_name -p 9100:8080 image_name

注解

-p <host_port>:<container_port>

4.4. command

docker build -t murphylan/cod_wiki .
docker push murphylan/cod_wiki
docker run -d --name mshop -p 80:80 murphylan/cod_mshop
docker run -d --name wiki -p 8082:80 murphylan/cod_wiki
docker ps                                          # List all running containers
docker container ls                                # List all running containers
docker container ls -a             # List all containers, even those not running
docker container stop <hash>           # Gracefully stop the specified container
docker container kill <hash>         # Force shutdown of the specified container
docker container rm <hash>        # Remove specified container from this machine
docker container rm $(docker container ls -a -q)         # Remove all containers
docker image ls -a                             # List all images on this machine
docker image rm <image id>            # Remove specified image from this machine
docker image rm $(docker image ls -a -q)   # Remove all images from this machine
docker login             # Log in this CLI session using your Docker credentials
docker tag <image> username/repository:tag  # Tag <image> for upload to registry
docker push username/repository:tag            # Upload tagged image to registry
docker run username/repository:tag                   # Run image from a registry

docker stack ls                                            # List stacks or apps
docker stack deploy -c <composefile> <appname>  # Run the specified Compose file
docker service ls                 # List running services associated with an app
docker service ps <service>                  # List tasks associated with an app
docker inspect <task or container>                   # Inspect task or container
docker container ls -q                                      # List container IDs
docker stack rm <appname>                             # Tear down an application
docker swarm leave --force      # Take down a single node swarm from the manager
docker logs <container_id>      # 显示日志

4.5. 搭建 DB server

https://github.ibm.com/lanzejun/db-docker

4.5.1. docker-compose.yml

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version: '3'
services:
mysql-server:
    container_name: mysql-server
    image: mysql:5.7
    volumes:
    - ./mysqldb:/var/lib/mysql
    environment:
        MYSQL_ROOT_PASSWORD: mysql123
        MYSQL_DATABASE: my_db
        MYSQL_USER: root
    ports:
    - 3306:3306
    expose:
    - 3306
mongo-server:
    container_name: mongo-server
    image: mongo:4.0.8-xenial
    environment:
        MONGO_INITDB_ROOT_USERNAME: root_app
        MONGO_INITDB_ROOT_PASSWORD: root123
        MONGO_DATABASE: mymongo
    volumes:
    - ./mongo-init.sh:/docker-entrypoint-initdb.d/mongo-init.sh:ro
    - ./mongodb/data/db:/data/db
    ports:
    - 27017:27017
    expose:
    - 27017
redis:
    image: 'bitnami/redis:5.0'
    environment:
        # ALLOW_EMPTY_PASSWORD is recommended only for development.
        - ALLOW_EMPTY_PASSWORD=yes
        - REDIS_DISABLE_COMMANDS=FLUSHDB,FLUSHALL
    ports:
        - '6379:6379'
    volumes:
        - ./redisdb:/bitnami/redis/data
rabbitmq:
    image: rabbitmq:management
    container_name: rabbitmq
    command: rabbitmq-server
    ports:
    - 15672:15672
    - 5672:5672
    expose:
    - 5672
    - 15672

4.5.2. mongo-init.sh

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mongo -- "$MONGO_DATABASE" <<EOF
    var user = '$MONGO_INITDB_ROOT_USERNAME';
    var passwd = '$MONGO_INITDB_ROOT_PASSWORD';
    var admin = db.getSiblingDB('admin');
    admin.auth(user, passwd);
    db.createUser({user: user, pwd: passwd, roles: ["readWrite"]});
EOF

4.5.3. start.sh

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#!/bin/bash

echo "Stop and clean all container ..."
docker container rm $(docker container ls -a -q)  -f
docker-compose rm -v

# echo "Clean all images with sba tag ..."
# docker rmi $(docker images | grep sba | tr -s ' ' | cut -d ' ' -f 3)

echo "docker-compose build and up ..."
docker-compose build
docker-compose up -d

4.6. Issue

  • Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

    systemctl start docker

  • ERROR: for user-auth no such image

    docker-compose rm -v

  • Delete old Docker images to free up space:

    # remove all unused / orphaned images
echo -e  "Removing unused images..."
docker rmi -f $(docker images --no-trunc | grep "<none>" | awk "{print \$3}") 2>&1 | cat;
echo -e  "Done removing unused images"

# clean up stuff -> using these instructions https://lebkowski.name/docker-volumes/
echo -e  "Cleaning up old containers..."
docker ps --filter status=dead --filter status=exited -aq | xargs docker rm -v 2>&1 | cat;
echo -e  "Cleaning up old volumes..."
docker volume ls -qf dangling=true | xargs docker volume rm 2>&1 | cat;

  • start redis error:

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05:50:03.00 INFO  ==> ** Starting Redis setup **
05:50:03.01 WARN  ==> You set the environment variable ALLOW_EMPTY_PASSWORD=yes. For safety reasons, do not use this flag in a production environment.
05:50:03.01 INFO  ==> Initializing Redis...

05:50:03.08 INFO  ==> ** Redis setup finished! **
05:50:03.09 INFO  ==> ** Starting Redis **
1:C 01 Nov 2019 05:50:03.107 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 01 Nov 2019 05:50:03.107 # Redis version=5.0.5, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 01 Nov 2019 05:50:03.107 # Configuration loaded
1:M 01 Nov 2019 05:50:03.108 # Can't open the append-only file: Permission denied
[root@buildup1 db-docker]# sudo chown -R 1001:1001 redisdb/