docs: Icinga DB Setup for every Distribution

[oxzi]

Within the GNU/Linux distribution specific installation guides, the "Set up Icinga DB" section was only excluded for openSUSE. However, since there is an openSUSE installation guide within Icinga DB¹, this is not consistent. Thus, the if-guard was removed, resulting in this section being available for each distribution. Windows is already excluded through an if-guard above.

Some cases for Fedora were missing, which were also added.

Footnotes

1. https://icinga.com/docs/icinga-db/latest/doc/02-Installation/openSUSE/ ↩

[Al2Klimov]

Indeed, https://icinga.com/docs/icinga-db/latest/doc/02-Installation/openSUSE/ is a thing now and you seem to have undisabled the correct section. But the latter doesn't even contain "openSUSE", in contrast to other OS.

[oxzi]

But the latter doesn't even contain "openSUSE", in contrast to other OS.

@Al2Klimov: Could you please rephrase your comment? Unfortunately, I failed to understand your objection.

I have just build the docs on this PR locally and compared the installation sections for each distribution. There is one diff: The "Set up Icinga DB" section is now available for openSUSE, as intended.

[Al2Klimov]

Ok and how does the section look like now for openSUSE?

[oxzi]

Ok and how does the section look like now for openSUSE?

Exactly like for every other distribution.

Click here for an ridiculous long screenshot

However, thanks to your Socratic questioning I realized cases for openSUSE and also Fedora were missing, which I have now added. Assuming you were aiming in this direction. Otherwise, please formulate your specific problem with the state of this PR.

OP addressed #10481 (review)

[Al2Klimov]

While we're on combining multiple OS in one section,

[oxzi]

We are already using common "SLES / openSUSE" sections at other places. I am just mimicking current behavior.

icinga2/doc/02-installation.md

Lines 223 to 230 in c2ca7d1

	<!-- {% if sles or opensuse %} -->
	<!-- {% if not icingaDocs %} -->
	#### SLES / openSUSE
	<!-- {% endif %} -->
	```bash
	zypper install icinga2
	```
	<!-- {% endif %} -->

[Al2Klimov]

I know and I agree.

[Al2Klimov]

why not here, too? The command is the same as for RHEL.

[oxzi]

Following my prior comment, at other places Fedora and RHEL are separated. Thus, I am following this pattern here as well.

icinga2/doc/02-installation.md

Lines 202 to 221 in c2ca7d1

	<!-- {% if rhel %} -->
	#### RHEL 8 or Later
	```bash
	dnf install icinga2
	systemctl enable icinga2
	systemctl start icinga2
	```
	<!-- {% endif %} -->
	<!-- {% if fedora %} -->
	<!-- {% if not icingaDocs %} -->
	#### Fedora
	<!-- {% endif %} -->
	```bash
	dnf install icinga2
	systemctl enable icinga2
	systemctl start icinga2
	```
	<!-- {% endif %} -->

[Al2Klimov]

This is fine.