Differences

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--- docker:ping_command_not_found [2020/04/15 21:58] – [Example Dockerfile for Ubuntu with ping] peter
+++ docker:ping_command_not_found [2020/05/13 08:49] (current) – removed peter
@@ Line 1: / Line 1: @@
-====== Docker - Ping command not found ======
-Docker container running Ubuntu which I did as follows:
-<code bash>
-docker run -it ubuntu /bin/bash
-</code>
-Then trying a ping:
-<code bash>
-ping somesite.com
-bash: ping: command not found
-</code>
-----
-Docker images are pretty minimal, But you can install ping in your official Ubuntu docker image via:
-<code bash>
-apt-get update
-apt-get install iputils-ping
-</code>
-Chances are you don't need ping your image, and just want to use it for testing purposes. Above example will help you out.
-But if you need ping to exist on your image, you can create a Dockerfile or commit the container you ran the above commands in to a new image.
-Commit:
-<code bash>
-docker commit -m "Installed iputils-ping" --author "Your Name <name@domain.com>" ContainerNameOrId yourrepository/imagename:tag
-</code>
-Dockerfile:
-<file bash Dockerfile>
-FROM ubuntu
-RUN apt-get update && apt-get install -y iputils-ping
-CMD bash
-</file>
-Please note there are best practices on creating docker images, Like clearing apt cache files after etc.
-**apt-get** fails with Temporary failure resolving 'security.ubuntu.com' obviously because networking is not present.
-----
-===== Example Dockerfile for Ubuntu with ping =====
-<code>
-mkdir ubuntu_with_ping
-cat >ubuntu_with_ping/Dockerfile <<'EOF'
-FROM ubuntu
-RUN apt-get update && apt-get install -y iputils-ping
-CMD bash
-EOF
-docker build -t ubuntu_with_ping ubuntu_with_ping
-docker run -it ubuntu_with_ping
-</code>