{"id":1364,"date":"2026-06-14T16:03:07","date_gmt":"2026-06-14T16:03:07","guid":{"rendered":"https:\/\/johnnycarlos.com\/?p=1364"},"modified":"2026-06-14T16:32:02","modified_gmt":"2026-06-14T16:32:02","slug":"containerizing-my-wordpress-blog","status":"publish","type":"post","link":"https:\/\/johnnycarlos.com\/index.php\/2026\/06\/14\/containerizing-my-wordpress-blog\/","title":{"rendered":"Containerizing my WordPress Blog"},"content":{"rendered":"\n

I’ve decided it’s finally time to learn containerization and am going to start with this blog. I’m running Ubuntu 24.04 and will be installing from the offical Docker repo since it’s the latest release. The Ubuntu repo often lags behind the official release.<\/p>\n\n\n\n

Step 1 –<\/strong> Check if ca-certificates are installed. In order to download the packages from the Docker servers, curl will check the certificates to make sure it is legitimate:<\/p>\n\n\n\n

dpkg -l ca-certificates<\/code><\/pre>\n\n\n\n
Step 2<\/strong> – Check that there is a directory for the keyrings.  It’s the designated place to store apt repository signing keys on Ubuntu:<\/p>\n\n\n\n
ls -ld \/etc\/apt\/keyrings<\/code><\/pre>\n\n\n\n
Step 3 – <\/strong>Next I downloaded the key and made sure it was readable by all users:<\/p>\n\n\n\n
sudo curl -fsSL https:\/\/download.docker.com\/linux\/ubuntu\/gpg -o \/etc\/apt\/keyrings\/docker.asc\nsudo chmod a+r \/etc\/apt\/keyrings\/docker.asc<\/code><\/pre>\n\n\n\n
Step 4 –<\/strong> Next I added the Docker apt repository:<\/p>\n\n\n\n
echo \\\n  \"deb [arch=$(dpkg --print-architecture) signed-by=\/etc\/apt\/keyrings\/docker.asc] \\\n  https:\/\/download.docker.com\/linux\/ubuntu \\\n  $(. \/etc\/os-release && echo \"${UBUNTU_CODENAME:-$VERSION_CODENAME}\") stable\" | \\\n  sudo tee \/etc\/apt\/sources.list.d\/docker.list > \/dev\/null<\/code><\/pre>\n\n\n\n
Check it with:<\/p>\n\n\n\n
cat \/etc\/apt\/sources.list.d\/docker.list<\/code><\/pre>\n\n\n\n
Step 5 –<\/strong> Update and install:<\/p>\n\n\n\n
sudo apt update\nsudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin<\/code><\/pre>\n\n\n\n
Check that it works:<\/p>\n\n\n\n
sudo docker run hello-world<\/code><\/pre>\n\n\n\n
Step 6 –<\/strong> Give myself permission to run Docker without sudo:<\/p>\n\n\n\n
sudo usermod -aG docker $USER<\/code><\/pre>\n\n\n\n
Some Basic Commands<\/h2>\n\n\n\n
Images<\/h4>\n\n\n\n
docker images                  # list images on your system\ndocker pull ubuntu             # download an image\ndocker rmi ubuntu              # remove an image<\/code><\/pre>\n\n\n\n
Containers<\/h4>\n\n\n\n
docker ps                      # list running containers\ndocker ps -a                   # list all containers (including stopped)\ndocker run hello-world         # run a container from an image\ndocker run -it ubuntu bash     # run interactively with a shell\ndocker stop <name\/id>          # stop a running container\ndocker rm <name\/id>            # remove a stopped container<\/code><\/pre>\n\n\n\n
Useful Run Flags<\/h4>\n\n\n\n
docker run -d ...              # detached (background)\ndocker run -p 8080:80 ...      # map host port 8080 to container port 80\ndocker run --name myapp ...    # give it a name instead of a random one<\/code><\/pre>\n\n\n\n
Housekeeping<\/h4>\n\n\n\n
docker system df               # see how much disk Docker is using\ndocker system prune            # clean up stopped containers, unused images, etc.<\/code><\/pre>\n\n\n\n
Logs and Inspection<\/h4>\n\n\n\n
docker logs <name\/id>          # view container output\ndocker inspect <name\/id>       # detailed info about a container or image<\/code><\/pre>\n\n\n\n
Notes to Myself<\/h4>\n\n\n\n
    \n
  • You cant delete an image if the container exists.  And if the container is stopped, then docker ps<\/code> won’t show it, you need to do docker ps -a<\/code><\/li>\n<\/ul>\n\n\n\n
    <\/p>\n","protected":false},"excerpt":{"rendered":"
    I’ve decided it’s finally time to learn containerization and am going to start with this blog. I’m running Ubuntu 24.04 and will be installing from the offical Docker repo since it’s the latest release. The Ubuntu repo often lags behind the official release. Step 1 – Check if ca-certificates are installed. In order to download […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":""},"categories":[28,36,29],"tags":[],"class_list":["post-1364","post","type-post","status-publish","format-standard","hentry","category-blog","category-linux","category-today-i-learned"],"_links":{"self":[{"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/posts\/1364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/comments?post=1364"}],"version-history":[{"count":4,"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/posts\/1364\/revisions"}],"predecessor-version":[{"id":1368,"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/posts\/1364\/revisions\/1368"}],"wp:attachment":[{"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/media?parent=1364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/categories?post=1364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/johnnycarlos.com\/index.php\/wp-json\/wp\/v2\/tags?post=1364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}