feat: adding alertmanager msteams support

[nicolastakashi]

Description

Adding support for Microsoft Teams receiver, since the pr prometheus/alertmanager#3324 from the upstream project Alertmanager has been merged already. while there's no release for over half one year. and fix #5766.

Co-Authored-By: @ksdpmx

Type of change

What type of changes does your code introduce to the Prometheus operator? Put an x in the box that apply.

• CHANGE (fix or feature that would cause existing functionality to not work as expected)
• FEATURE (non-breaking change which adds functionality)
• BUGFIX (non-breaking change which fixes an issue)
• ENHANCEMENT (non-breaking change which improves existing functionality)
• NONE (if none of the other choices apply. Example, tooling, build system, CI, docs, etc.)

Changelog entry

Please put a one-line changelog entry below. This will be copied to the changelog file during the release process.

feat: add support for MSTeams receiver

[slashpai]

just a nit, lgtm otherwise :)

[pixiono]

We ran into the same issue today and would like to use the msteams integration.

[simonpasquier]

This looks good in general! And sorry for the delay.

[simonpasquier]

same remarks than for v1alpha1

[ArthurSens]

One small nit besides the formatting issues

thanks for continuing this!

[rgarcia89]

lgtm

[rgarcia89]

I think I just found some further mistakes which I did not notice during the review...

https://github.com/prometheus-operator/prometheus-operator/blob/a10b739fb3f7a56165ba8d4e1bfb57168ddb78cd/pkg/alertmanager/amcfg.go#L642C1-L652C3
https://github.com/prometheus-operator/prometheus-operator/blob/main/pkg/alertmanager/amcfg.go#L680

prometheus-operator/pkg/alertmanager/amcfg_test.go

Line 1949 in a10b739

MSTeamsConfigs: []monitoringv1alpha1.MSTeamsConfig{

The receiver is defined as msteamsConfigs. Not msTeamsConfigs.

[ArthurSens]

When encoding go structs to yaml/json, Go uses the structs tags to write down yaml strings

The tag is correct :) msteamsConfigs

prometheus-operator/pkg/apis/monitoring/v1alpha1/alertmanager_config_types.go

Line 184 in a10b739

MSTeamsConfigs []MSTeamsConfig `json:"msteamsConfigs,omitempty"`

This is also what the golden file is showing us
https://github.com/prometheus-operator/prometheus-operator/blob/a10b739fb3f7a56165ba8d4e1bfb57168ddb78cd/pkg/alertmanager/testdata/CR_with_MSTeams_Receiver.golden

Looking at alertmanager configuration docs, this is also what it is expected

[kj187]

Nice job guys! Do you know when we can expect a new prometheus-operator tag to use it?

[simonpasquier]

@kj187 soon, I'm working on it :)