OS: CentOS 7
\nInstall Docker:<\/p>\n
# yum install docker-ce-cli docker-ce<\/p><\/blockquote>\n
Start Docker:<\/p>\n
# systemctl start docker<\/p><\/blockquote>\n
Help:<\/p>\n
# docker –help<\/p><\/blockquote>\n
You can tack on a –help on the end of any command to get help of that specific option:<\/p>\n
# docker pull –help<\/p><\/blockquote>\n
Pull in an image from hub.docker.com:<\/p>\n
# docker pull ubuntu<\/p><\/blockquote>\n
To list your installed images and obtain the IMAGE ID:<\/p>\n
# docker images<\/p><\/blockquote>\n
To run an image:<\/p>\n
# docker run -it -d ubuntu<\/p><\/blockquote>\n
To view running images:<\/p>\n
# docker ps<\/p><\/blockquote>\n
To stop a running container:<\/p>\n
# docker stop ‘CONTAINTER ID<\/em>‘<\/p><\/blockquote>\n
To execute a command in a container (In this case, bash in the ubuntu image.):<\/p>\n
# docker exec -it ‘CONTAINTER ID<\/em>‘ bash<\/p><\/blockquote>\n
To view all container, including those that are not running:<\/p>\n
# docker ps -a<\/p><\/blockquote>\n
To remove a container:<\/p>\n
# docker rm ‘CONTAINTER ID<\/em>‘<\/p><\/blockquote>\n
To remove an image:
\n# docker rmi ‘IMAGE ID<\/em>‘<\/p>\nTo stop and remove a running container:<\/p>\n
# docker rm -f ‘CONTAINTER ID<\/em>‘<\/p><\/blockquote>\n
To save changes to a container:<\/p>\n
# docker commit ‘CONTAINTER ID<\/em>‘ ‘NEW IMAGE NAME<\/em>‘<\/p><\/blockquote>\n
To remove all running containers:<\/p>\n
# docker rm -f $(docker ps -a -q)<\/p><\/blockquote>\n
NOTE: INSTANCE ID can refer an image or container. The next two command will return the information in json format.
\nTo view a container’s history:<\/p>\n# docker history ‘INSTANCE ID<\/em>‘<\/p><\/blockquote>\n
To view information about a container:<\/p>\n
# docker inspect ‘INSTANCE ID<\/em>‘<\/p><\/blockquote>\n
If you want to upload your container to hub.docker.com the container must have a name in the following format:<\/p>\n
# docker commit ‘CONTAINTER ID<\/em>‘ ‘dockerhubuserid’\/’newimagename’<\/p><\/blockquote>\n
To run a container and map a host port to the container port:<\/p>\n
# docker run -it -d -p 82:80 jgz\/apache2<\/p><\/blockquote>\n
Then, in this case, I would access my container web server from my LAN by accessing my docker host name and the port 82. So, if my hostname is jims.domain.local, the I would browse to http:\/\/jims.domain.local:82.<\/p>\n
A Dockerfile is how you can create a container and run some commands when you start it up:
\nBuilding a Dockerfile (YAML file):<\/p>\n# mkdir \/usr\/local\/docker
\n# cd \/usr\/local\/docker\/
\n# vi Dockerfile
\n…
\nFROM ubuntu
\nRUN apt-get update
\nRUN apt-get -y install apache2
\nADD . \/var\/www\/html
\nENTRYPOINT apachectl -D FOREGROUND
\nENV name jgz<\/p><\/blockquote>\nThis will build the container and execute the RUN commands and ENTRYPOINT command:<\/p>\n
# docker build . -t new_dockerfile<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
OS: CentOS 7 Install Docker: # yum install docker-ce-cli docker-ce Start Docker: # systemctl start docker Help: # docker –help You can tack on a –help on the end of any command to get help of that specific option: # docker pull –help Pull in an image from hub.docker.com: # docker pull ubuntu To list [&hellip<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[494],"class_list":["post-1748","post","type-post","status-publish","format-standard","hentry","category-documentation","tag-docker"],"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/1748","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1748"}],"version-history":[{"count":11,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/1748\/revisions"}],"predecessor-version":[{"id":1800,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/1748\/revisions\/1800"}],"wp:attachment":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}