Merge ~ubuntu-docker-images/ubuntu-docker-images/+git/prometheus:2.32-20.04 into ~ubuntu-docker-images/ubuntu-docker-images/+git/prometheus:2.28-21.10

[Sergio Durigan Junior]

This MP updates the prometheus 20.04 OCI image to the latest upstream version, 2.32.1.

I'm using the 21.10 Dockerfile as a base; that's why this is targeted to the 21.10 branch.

Our unit tests are passing. Bear in mind that in order to speed up the process I went ahead and already pushed the branch to the official repository, updated the OCI recipe and triggered builds. This MP is more of a formality; I just would like another pair of eyes to take a look and see if I didn't miss anything.

[Bryce Harrington (bryce)]

+1, lgtm

[Bryce Harrington (bryce)]

review: Approve

[Sergio Durigan Junior (sergiodj)]

Thanks, Bryce. Setting as Merged.

diff --git a/Dockerfile b/Dockerfile
index 06d25f8..cebab0e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:impish AS snap-installer
+FROM ubuntu:focal AS snap-installer
 
 RUN set -eux; \
 	apt-get update; \
@@ -7,11 +7,11 @@ RUN set -eux; \
 		jq curl ca-certificates squashfs-tools; \
 # taken from https://snapcraft.io/docs/build-on-docker
 # Alternatively, we can install snapd, and issue `snap download prometheus`
-	curl -L -H 'Snap-CDN: none' $(curl -H 'X-Ubuntu-Series: 16'  -H "X-Ubuntu-Architecture: $(dpkg --print-architecture)" 'https://api.snapcraft.io/api/v1/snaps/details/prometheus?channel=21.10/edge' | jq '.download_url' -r) --output prometheus.snap; \
+	curl -L -H 'Snap-CDN: none' $(curl -H 'X-Ubuntu-Series: 16'  -H "X-Ubuntu-Architecture: $(dpkg --print-architecture)" 'https://api.snapcraft.io/api/v1/snaps/details/prometheus?channel=20.04/edge' | jq '.download_url' -r) --output prometheus.snap; \
 	mkdir -p /snap; \
 	unsquashfs -d /snap/prometheus prometheus.snap
 
-FROM ubuntu:impish
+FROM ubuntu:focal
 
 ENV TZ UTC