doc/: don't mention CentOS

It's EOL.
Icinga · Sep 5, 2024 · 7fd1580 · 7fd1580
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diff --git a/doc/02-installation.md b/doc/02-installation.md
@@ -72,21 +72,6 @@ apt update
 ```
 <!-- {% endif %} -->
 
-<!-- {% if centos %} -->
-### CentOS Repository <a id="centos-repository"></a>
-
-```bash
-wget https://packages.icinga.com/centos/ICINGA-release.repo -O /etc/yum.repos.d/ICINGA-release.repo
-```
-
-The packages for CentOS depend on other packages which are distributed
-as part of the [EPEL repository](https://fedoraproject.org/wiki/EPEL):
-
-```bash
-yum install epel-release
-```
-<!-- {% endif %} -->
-
 <!-- {% if rhel %} -->
 ### RHEL Repository <a id="rhel-repository"></a>
 
@@ -212,7 +197,7 @@ You can install Icinga 2 by using your distribution's package manager
 to install the `icinga2` package. The following commands must be executed
 with `root` permissions unless noted otherwise.
 
-<!-- {% if centos or rhel or fedora or amazon_linux %} -->
+<!-- {% if rhel or fedora or amazon_linux %} -->
 !!! tip
 
     If you have [SELinux](22-selinux.md) enabled, the package `icinga2-selinux` is also required.
@@ -227,21 +212,6 @@ apt install icinga2
 ```
 <!-- {% endif %} -->
 
-<!-- {% if centos %} -->
-<!-- {% if not icingaDocs %} -->
-#### CentOS
-<!-- {% endif %} -->
-!!! info
-
-    Note that installing Icinga 2 is only supported on CentOS 7 as CentOS 8 is EOL.
-
-```bash
-yum install icinga2
-systemctl enable icinga2
-systemctl start icinga2
-```
-<!-- {% endif %} -->
-
 <!-- {% if rhel %} -->
 #### RHEL 8 or Later
 
@@ -339,17 +309,6 @@ apt install monitoring-plugins
 ```
 <!-- {% endif %} -->
 
-<!-- {% if centos %} -->
-<!-- {% if not icingaDocs %} -->
-#### CentOS
-<!-- {% endif %} -->
-The packages for CentOS depend on other packages which are distributed as part of the EPEL repository.
-
-```bash
-yum install nagios-plugins-all
-```
-<!-- {% endif %} -->
-
 <!-- {% if rhel %} -->
 <!-- {% if not icingaDocs %} -->
 #### RHEL
@@ -437,7 +396,7 @@ Restart Icinga 2 for these changes to take effect.
 systemctl restart icinga2
 ```
 
-<!-- {% if amazon_linux or centos or debian or rhel or sles or ubuntu %} -->
+<!-- {% if amazon_linux or debian or rhel or sles or ubuntu %} -->
 ## Set up Icinga DB <a id="set-up-icinga-db"></a>
 
 Icinga DB is a set of components for publishing, synchronizing and
@@ -489,20 +448,6 @@ yum install icingadb-redis
 ```
 <!-- {% endif %} -->
 
-<!-- {% if centos %} -->
-<!-- {% if not icingaDocs %} -->
-##### CentOS
-<!-- {% endif %} -->
-
-!!! info
-
-    Note that installing Icinga DB Redis is only supported on CentOS 7 as CentOS 8 is EOL.
-
-```bash
-yum install icingadb-redis
-```
-<!-- {% endif %} -->
-
 <!-- {% if debian or ubuntu %} -->
 <!-- {% if not icingaDocs %} -->
 ##### Debian / Ubuntu / Raspberry Pi OS
@@ -616,9 +561,6 @@ you have completed the instructions here and can proceed to
 <!-- {% if amazon_linux %} -->
 [install the Icinga DB daemon on Amazon Linux](https://icinga.com/docs/icinga-db/latest/doc/02-Installation/01-Amazon-Linux/#installing-icinga-db-package),
 <!-- {% endif %} -->
-<!-- {% if centos %} -->
-[install the Icinga DB daemon on CentOS](https://icinga.com/docs/icinga-db/latest/doc/02-Installation/02-CentOS/#installing-icinga-db-package),
-<!-- {% endif %} -->
 <!-- {% if debian %} -->
 [install the Icinga DB daemon on Debian](https://icinga.com/docs/icinga-db/latest/doc/02-Installation/03-Debian/#installing-icinga-db-package),
 <!-- {% endif %} -->

diff --git a/doc/02-installation.md.d/05-CentOS.md b/doc/02-installation.md.d/05-CentOS.md
diff --git a/doc/03-monitoring-basics.md b/doc/03-monitoring-basics.md
@@ -2729,7 +2729,7 @@ Requirements:
 * Icinga 2 as client on the remote node
 * icinga user with sudo permissions to the httpd daemon
 
-Example on CentOS 7:
+Example on RHEL:
 
 ```
 # visudo

diff --git a/doc/05-service-monitoring.md b/doc/05-service-monitoring.md
@@ -51,7 +51,7 @@ described. Try running the plugin after setup and [ensure it works](05-service-m
 Prior to using the check plugin with Icinga 2 you should ensure that it is working properly
 by trying to run it on the console using whichever user Icinga 2 is running as:
 
-RHEL/CentOS/Fedora
+RHEL/Fedora
 
 ```bash
 sudo -u icinga /usr/lib64/nagios/plugins/check_mysql_health --help
@@ -111,7 +111,7 @@ Can't locate Net/SNMP.pm in @INC (you may need to install the Net::SNMP module)
 
 Prior to installing the Perl module via CPAN, look for a distribution
 specific package, e.g. `libnet-snmp-perl` on Debian/Ubuntu or `perl-Net-SNMP`
-on RHEL/CentOS.
+on RHEL.
 
 
 #### Optional: Custom Path <a id="service-monitoring-plugins-custom-path"></a>

diff --git a/doc/06-distributed-monitoring.md b/doc/06-distributed-monitoring.md
@@ -264,7 +264,7 @@ The setup wizard will ensure that the following steps are taken:
 * Update the [ApiListener](06-distributed-monitoring.md#distributed-monitoring-apilistener) and [constants](04-configuration.md#constants-conf) configuration.
 * Update the [icinga2.conf](04-configuration.md#icinga2-conf) to disable the `conf.d` inclusion, and add the `api-users.conf` file inclusion.
 
-Here is an example of a master setup for the `icinga2-master1.localdomain` node on CentOS 7:
+Here is an example of a master setup for the `icinga2-master1.localdomain` node:
 
 ```
 [[email protected] /]# icinga2 node wizard
@@ -1031,9 +1031,7 @@ in `/etc/icinga2/icinga2.conf`.
 > Defaults to disabled.
 
 Now it is time to validate the configuration and to restart the Icinga 2 daemon
-on both nodes.
-
-Example on CentOS 7:
+on both nodes:
 
 ```
 [[email protected] /]# icinga2 daemon -C
@@ -1112,7 +1110,8 @@ Save the changes and validate the configuration on the master node:
 ```
 [[email protected] /]# icinga2 daemon -C
 ```
-Restart the Icinga 2 daemon (example for CentOS 7):
+
+Restart the Icinga 2 daemon:
 
 ```
 [[email protected] /]# systemctl restart icinga2
@@ -1221,9 +1220,7 @@ object ApiListener "api" {
 ```
 
 Now it is time to validate the configuration and to restart the Icinga 2 daemon
-on both nodes.
-
-Example on CentOS 7:
+on both nodes:
 
 ```
 [[email protected] /]# icinga2 daemon -C
@@ -1285,7 +1282,7 @@ Save the changes and validate the configuration on the master node:
 [[email protected] /]# icinga2 daemon -C
 ```
 
-Restart the Icinga 2 daemon (example for CentOS 7):
+Restart the Icinga 2 daemon:
 
 ```
 [[email protected] /]# systemctl restart icinga2

diff --git a/doc/11-cli-commands.md b/doc/11-cli-commands.md
@@ -73,7 +73,7 @@ RPM and Debian packages install the bash completion files into
 
 You need to install the `bash-completion` package if not already installed.
 
-RHEL/CentOS/Fedora:
+RHEL/Fedora:
 
 ```bash
 yum install bash-completion

diff --git a/doc/14-features.md b/doc/14-features.md
@@ -815,16 +815,6 @@ apt-get install icinga2-ido-mysql
     default. You can skip the automated setup and install/upgrade the
     database manually if you prefer.
 
-###### CentOS 7
-
-!!! info
-
-    Note that installing `icinga2-ido-mysql` is only supported on CentOS 7 as CentOS 8 is EOL.
-
-```bash
-yum install icinga2-ido-mysql
-```
-
 ###### RHEL 8
 
 ```bash
@@ -914,16 +904,6 @@ apt-get install icinga2-ido-pgsql
     You can skip the automated setup and install/upgrade the database manually
     if you prefer that.
 
-###### CentOS 7
-
-!!! info
-
-    Note that installing `icinga2-ido-pgsql` is only supported on CentOS 7 as CentOS 8 is EOL.
-
-```bash
-yum install icinga2-ido-pgsql
-```
-
 ###### RHEL 8
 
 ```bash