docker Miscellany

Disclaimer: This article is a blogger original article, welcome to reprint. https://blog.csdn.net/guo_xl/article/details/88150581

1. docker installation

step 1: install the necessary number of system tools

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

Step 2: Add source software information

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

Step 3: update and install Docker-CE

sudo yum makecache fast
sudo yum -y install docker-ce

Step 4: open Docker Service

sudo service docker start

2. docker run container

jenkins

docker run \
 --name jenkins\
 -d \
 --rm \
 -u root \
 -p 8686:8080 \
 -v /data/jenkins/jenkins-data:/var/jenkins_home \
 -v /data/jenkins/run/docker.sock:/var/run/docker.sock \
 -v /data/jenkins/home:/home \
 jenkinsci/blueocean

Note:
-name developing container name
-u root user to specify
-d background
-v volumn mapping host machine path: container path
-p port mapping host machine port: container port

Activemq

docker run --name activemq \
 -d\
 -v /data/activemq:/data/activemq \
 -v /data/activemq/conf:/opt/activemq/conf\
 -v /data/activemq/log:/var/log\
 -p 61616:61616\
 -p  8161:8161\
 webcenter/activemq 

Zookeeper

docker run \
--name zookeeper \
--hostname zookeeper \
--restart always -d \
-p 2181:2181 -p 2888:2888 -p 3888:3888 \
-v /data/zk/conf:/conf \
-v /data/zk/data:/data \
-v /data/zk/datalog:/datalog \
zookeeper

Mysql

docker run -p 3306:3306 \ 
--name mysql \
 -v $PWD/conf:/etc/mysql/conf.d \
 -v $PWD/logs:/logs \
 -v $PWD/data:/var/lib/mysql \
 -e MYSQL_ROOT_PASSWORD=devuser \
 -d mysql:latest

• -p 3306: 3306: 3306 mapped to port 3306 of container port on the computer.
• -v -v $ PWD / conf: /etc/mysql/conf.d: the conf / my.cnf under the current directory is mounted to the host /etc/mysql/my.cnf container.
• -v $ PWD / logs: / logs: the logs directory under the current directory is mounted to the host container / logs.
• -v $ PWD / data: / var / lib / mysql: a data directory of the host current directory is mounted to the container / var / lib / mysql.
• -e MYSQL_ROOT_PASSWORD = 123456: initialize the root user's password.

Redis

docker run  --name redis \
-p 6379:6379 \
-v /data/redis/data:/data \
--appendonly yes \
-d redis:3.2  

3. docker know how the parameters of the container

When docker run command, you need to pass parameters, and sometimes do not know what parameters Yes.
For example activemq

docker run --name activemq 
 -d
 -v /data/activemq:/data/activemq 
 -v /data/activemq/conf:/opt/activemq/conf
 -v /data/activemq/log:/var/log
 -p 61616:61616
 -p  8161:8161
 webcenter/activemq 

How do I know activemq in the volumn is / data / activemq, how do you know which port it

You can first default docker run --name myactivemq webcenter / activemq after performing a first
execution

docker inspect myactivemq 

Can be obtained from the nodes to the Config follows

"Config": {
            "Hostname": "3d8ee09e3acb",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "1883/tcp": {},
                "5672/tcp": {},
                "61613/tcp": {},
                "61614/tcp": {},
                "61616/tcp": {},
                "8161/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "ACTIVEMQ_CONFIG_DIR=/opt/activemq/conf.tmp",
                "ACTIVEMQ_DATA_DIR=/data/activemq"
            ],
            "Cmd": [
                "/app/run.sh"
            ],
            "ArgsEscaped": true,
            "Image": "webcenter/activemq",
            "Volumes": {
                "/data/activemq": {},
                "/opt/activemq/conf": {},
                "/var/log/activemq": {}
            },
            "WorkingDir": "/opt/activemq",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {}
        }

4. docker encountered problems

• Question 1

docker: Error response from daemon: driver failed programming external connectivity on endpoint jenkins (322630d9843d744f8efa4ce07632025c0105a5933a42e3413ea6d4538b41aeba):  (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 8686 -j DNAT --to-destination 172.17.0.2:8080 ! -i docker0: iptables: No chain/target/match by that nam

solve:
systemctl restart docker