Upgrade thanos version

[ilangofman]

Signed-off-by: ilangofman [email protected]

What this PR does:

Upgrades the current version of Thanos to the latest main branch. New version: thanos v0.19.1-0.20210729154440-aa148f8fdb28.

Which issue(s) this PR fixes:
Fixes #

Checklist

• Tests updated
• Documentation added
• CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

[ilangofman]

In the community call, it was mentioned that the Thanos metrics are mapped in Cortex. I wasn't sure where to look for any changes, can someone please point me to it? I've left it in drafts status until I can verify that if there are any new metrics, then they have been mapped.

[pracucci]

This PR LGTM. I would add a CHANGELOG entry for the file permissions change, something like this:

* [CHANGE] The directory and file permissions for TSDB blocks stored on disk in ingester, compactor and store-gateway have been restricted to be writeable only by the owner and readable by owner and group. #4394

In the community call, it was mentioned that the Thanos metrics are mapped in Cortex. I wasn't sure where to look for any changes, can someone please point me to it? I've left it in drafts status until I can verify that if there are any new metrics, then they have been mapped.

From a quick look, I think no metrics have been changed, so nothing to do.

[ilangofman]

Thanks for taking a look @pracucci. Really appreciate it. I have added the change log entry.

[pstibrany]

changelog entry is not quite correct (blocks on ingester are produced by prometheus code, which isn't changed, files generated by thanos code aren't group readable), but otherwise lgtm.