为特定的ubuntu版本安装特定版本的apt软件包

Question

I want to install package foo version 1234 in a docker container. I prefer this to the latest version, as it will always work the same way.

So my Dockerfile has this:

RUN apt-get update && apt-get install -y foo=1234

But the base image is mongodb:4.0.2 , which is layered on Ubuntu xenial.

When I build the image, the apt install fails because it cannot find that version. I think xenial doesn't support that version.

So how do I find the latest supported version of a package foo on xenial? If I run apt policy foo it shows me the latest for the ubuntu I'm using (bionic), not for xenial.

Answer 1

If the package at stake is, say, rlwrap , you could just take a look at the webpage https://packages.ubuntu.com/xenial/rlwrap

But if you want a proper way to get this version info programatically, you can rely on the Launchpad API , which comes with an official API client implemented as a Python library .

Otherwise, you can directly query the API with tools such as curl and jq (to parse the retrieved JSON data):

$ curl -fsSL "https://api.launchpad.net/1.0/ubuntu/+archive/primary?ws.op=getPublishedSources&source_name=rlwrap&exact_match=true&distro_series=https://api.launchpad.net/1.0/ubuntu/xenial" \
  | jq --raw-output ".entries | .[0] | .source_package_version"

→ 0.41-1build1

As mentioned in this Askubuntu question , a similar API exists for Debian as well.