Install docker1.9.1 on CentOS7

Install docker1.9.1 on CentOS7

I used EPEL official source to install Docker. So in the previous article, I wrote the steps for installing EPEL official source.

1. installation:

yum -y install docker-io

View the Docker version:

docker -v

The result is as follows:

Docker version 1.9.1, build ab77bde/1.9.1

2. Start Docker:

Start Docker as a service

service docker start

3. view existing images:

docker images

No image is displayed here. You need to download the image.

4. Search for and download the desired CentOS image:

docker search centos

The result is as follows:

INDEX       NAME                                      DESCRIPTION                                     STARS     OFFICIAL   AUTOMATEDdocker.io   docker.io/centos                          The official build of CentOS.                   2329      [OK]       docker.io   docker.io/ansible/centos7-ansible         Ansible on Centos7                              74                   [OK]docker.io   docker.io/jdeathe/centos-ssh              CentOS-6 6.7 x86_64 / CentOS-7 7.2.1511 x8...   25                   [OK]docker.io   docker.io/jdeathe/centos-ssh-apache-php   CentOS-6 6.7 x86_64 / Apache / PHP / PHP M...   17                   [OK]docker.io   docker.io/nimmis/java-centos              This is docker images of CentOS 7 with dif...   12                   [OK]docker.io   docker.io/million12/centos-supervisor     Base CentOS-7 with supervisord launcher, h...   11                   [OK]docker.io   docker.io/consol/centos-xfce-vnc          Centos container with "headless" VNC sessi...   9                    [OK]docker.io   docker.io/torusware/speedus-centos        Always updated official CentOS docker imag...   8                    [OK]docker.io   docker.io/nickistre/centos-lamp           LAMP on centos setup                            4                    [OK]docker.io   docker.io/centos/mariadb55-centos7                                                        3                    [OK]docker.io   docker.io/nathonfowlie/centos-jre         Latest CentOS image with the JRE pre-insta...   3                    [OK]docker.io   docker.io/consol/sakuli-centos-xfce       Sakuli end-2-end testing and monitoring co...   2                    [OK]docker.io   docker.io/blacklabelops/centos            CentOS Base Image! Built and Updates Daily!     1                    [OK]docker.io   docker.io/darksheer/centos                Base Centos Image -- Updated hourly             1                    [OK]docker.io   docker.io/timhughes/centos                Centos with systemd installed and running       1                    [OK]docker.io   docker.io/yajo/centos-epel                CentOS with EPEL and fully updated              1                    [OK]docker.io   docker.io/ericuni/centos                  centos dev                                      0                    [OK]docker.io   docker.io/grayzone/centos                 auto build for centos.                          0                    [OK]docker.io   docker.io/grossws/centos                  CentOS 6 and 7 base images with gosu and l...   0                    [OK]docker.io   docker.io/januswel/centos                 yum update-ed CentOS image                      0                    [OK]docker.io   docker.io/jsmigel/centos-epel             Docker base image of CentOS w/ EPEL installed   0                    [OK]docker.io   docker.io/kz8s/centos                     Official CentOS plus epel-release               0                    [OK]docker.io   docker.io/labengine/centos                Centos image base                               0                    [OK]docker.io   docker.io/repositoryjp/centos             Docker Image for CentOS.                        0                    [OK]docker.io   docker.io/ustclug/centos                   USTC centos                                    0                    [OK]

Here I usecentos7-ansibleImage, You need to download the image:

docker pull ansible/centos7-ansible

After the download is complete, check the existing image again:

docker images

The result is as follows:

REPOSITORY                          TAG                 IMAGE ID            CREATED             VIRTUAL SIZEdocker.io/ansible/centos7-ansible   latest              8bfa335400c7        27 hours ago        454.3 MB

5. Use an image to create a Docker container:

docker run -i -t 8bfa335400c7 /bin/bash

Run Command,-iIt indicates interaction,-tRepresents a temporary terminal (Pseudo Terminal ),8bfa335400c7Is the image ID, that is, in step 4IMAGE ID, Use/bin/bash, Which means to usebashYou can start a Pseudo Terminal to interact with the container. The following warning is prompted during startup:

Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning.

You can also go to Baidu to find a solution. After the service is started, it enters the docker container. Exit container:

exit

Or:

ctrl + d

After exiting, you can view all used containers:

docker ps -a

View the running container:

docker ps

I am not using this because a started container is disabled.-aThe command does not display the result. Use-aThe command displays the following results:

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES20342f7db4a9        8bfa335400c7        "/bin/bash"         14 minutes ago      Exited (0) 4 minutes ago                       mad_archimedes

6. re-enter the specified container:

docker start 20342f7db4a9

UsestartCommand, followed by the id value is the container ID value (ContainerID) found above, start and use the following command to enter:

docker attach 20342f7db4a9