docs: Add logrotate config and update install docs (#5520)

doc/Installation/Installation-CentOS-6-Apache-Nginx.md

@@ -185,7 +185,7 @@ If you are running Apache 2.2.18 or higher (current version in Centos 7 official
   </Directory>
 </VirtualHost>
 ```
-If the file `/etc/httpd/conf.d/welcome.conf` exists, you will want to remove that as well unless you're familiar with [Name-based Virtual Hosts](https://httpd.apache.org/docs/2.2/vhosts/name-based.html). 
+If the file `/etc/httpd/conf.d/welcome.conf` exists, you will want to remove that as well unless you're familiar with [Name-based Virtual Hosts](https://httpd.apache.org/docs/2.2/vhosts/name-based.html).
 ```bash
 rn /etc/httpd/conf.d/welcome.conf /etc/httpd/conf.d/welcome.conf.bak
 ```
@@ -377,6 +377,12 @@ Create the cronjob
 
     cp librenms.nonroot.cron /etc/cron.d/librenms
 
+### Copy logrotate config ###
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 ### Daily Updates ###
 
 LibreNMS performs daily updates by default.  At 00:15 system time every day, a `git pull --no-edit --quiet` is performed.  You can override this default by editing

doc/Installation/Installation-CentOS-7-Apache.md

@@ -137,6 +137,12 @@ systemctl restart snmpd
 
 `cp librenms.nonroot.cron /etc/cron.d/librenms`
 
+#### Copy logrotate config
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 #### Final steps
 
 ```bash

doc/Installation/Installation-CentOS-7-Nginx.md

@@ -35,7 +35,7 @@ sql-mode=""
 
 ### Web Server ###
 
-#### Install / Configure Nginx 
+#### Install / Configure Nginx
 
 ```bash
 yum install epel-release
@@ -160,6 +160,12 @@ systemctl restart snmpd
 
 `cp librenms.nonroot.cron /etc/cron.d/librenms`
 
+#### Copy logrotate config
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 #### Final steps
 
 ```bash

doc/Installation/Installation-Ubuntu-1404-Apache.md

@@ -206,6 +206,12 @@ Create the cronjob
 
     cp librenms.nonroot.cron /etc/cron.d/librenms
 
+### Copy logrotate config ###
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 ### Daily Updates ###
 
 LibreNMS performs daily updates by default.  At 00:15 system time every day, a `git pull --no-edit --quiet` is performed.  You can override this default by editing your `config.php` file.  Remove the comment (the `#` mark) on the line:

doc/Installation/Installation-Ubuntu-1404-Lighttpd.md

@@ -185,6 +185,12 @@ Create the cronjob
 
     cp librenms.nonroot.cron /etc/cron.d/librenms
 
+### Copy logrotate config ###
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 ### Daily Updates ###
 
 LibreNMS performs daily updates by default.  At 00:15 system time every day, a `git pull --no-edit --quiet` is performed.  You can override this default by editing your `config.php` file.  Remove the comment (the `#` mark) on the line:

doc/Installation/Installation-Ubuntu-1404-Nginx.md

@@ -212,6 +212,12 @@ Create the cronjob
 
     cp librenms.nonroot.cron /etc/cron.d/librenms
 
+### Copy logrotate config ###
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 ### Daily Updates ###
 
 LibreNMS performs daily updates by default.  At 00:15 system time every day, a `git pull --no-edit --quiet` is performed.  You can override this default by editing your `config.php` file.  Remove the comment (the `#` mark) on the line:

doc/Installation/Installation-Ubuntu-1604-Apache.md

@@ -121,6 +121,12 @@ systemctl restart snmpd
 
 `cp librenms.nonroot.cron /etc/cron.d/librenms`
 
+#### Copy logrotate config
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 #### Final steps
 
 ```bash

doc/Installation/Installation-Ubuntu-1604-Nginx.md

@@ -125,6 +125,12 @@ systemctl restart snmpd
 
 `cp librenms.nonroot.cron /etc/cron.d/librenms`
 
+#### Copy logrotate config
+
+LibreNMS keeps logs in `/opt/librenms/logs`. Over time these can become large and be rotated out.  To rotate out the old logs you can use the provided logrotate config file:
+
+    cp misc/librenms.logrotate /etc/logrotate.d/librenms
+
 #### Final steps
 
 ```bash

misc/librenms.logrotate

@@ -0,0 +1,9 @@
+# /etc/logrotate.d/librenms
+/opt/librenms/logs/*.log {
+    weekly
+    rotate 6
+    compress
+    delaycompress
+    missingok
+    notifempty
+}