Monitoring

We closely monitor all aspects of your server. According to the selected SLA level, our on-call organization will take appropriate actions and notify you whenever required.

To analyze the state of the system yourself, you can access all the required tools and logs that we have available. This collection of means is outlined below.

Access the status page

The server status vhost is running on the server’s local interface, port 2813. It is reachable only from the server itself. You can reach the status page through an SSH port forward or SOCKS proxy.

To forward the status vHosts port to your local machine, you can run the following command:

ssh <hostname> -L 2813:127.0.0.1:2813

A overview of all available status pages is then available at https://127.0.0.1:2813/ within your local browser. Please ignore the certificate warning for this particular situation.

From there on you can follow the links to the below mentioned status pages of Monit, Apache and PHP as described in detail below.

Service Status

Each configured service is monitored through the Monit daemon. To diagnose the state of individual services, access the Monit service manager at https://127.0.0.1:2813/monit/.

Tip

The monit status can also be checked in the terminal with service-summary as the devop user (see Generic Admin User).

Apache Status

The status module allows you to find out how well the server is performing. An HTML page is presented that gives the current server statistics in an easily readable form. The server-status page may be used as a starting place for troubleshooting a situation where your server is consuming all available resources, and you wish to identify which requests or clients are causing the problem.

Also, you can find all information related to Let’s Encrypt certificates (“Managed Certificates” section) and OCSP certificate stapling (“Managed Staplings” section) on the Apache status page.

You can reach the Apache status page at https://127.0.0.1:2813/apache/.

In addition the Quality of Service (QoS) Module for Apache provides additional numbers and is reachable at https://127.0.0.1:2813/qos/.

PHP Status

The PHP pool status page does report configuration information about the current PHP FPM pool, and displays a list of all running processes and their state.

You can reach the PHP status page at https://127.0.0.1:2813/fpm-<website-name>/.

MariaDB

With the devop user (see Generic Admin User) you can view the SQL processes of all users.

mysql -e "SHOW PROCESSLIST"

Munin

Munin provides a interactive web dashboard for ressource analyses which collects data every 5 minutes. You can reach its webinterface at https://127.0.0.1:2813/munin/.

collectd

System statistics are collected every 10 seconds by collectd and written to RRD files in /var/lib/collectd. For performance reasons, we don’t create graphs by default. Therefore you have to download and render them yourself with a tool of your choice.

Tip

To generate performance graphs out of those RRD files, we provide a Collectd-web container, which we use ourselves to analyze workloads for our customers.

Reboot

An automatic reboot of the server is initiated to remediate overload situations. For this to happen, one of the following criteria must be met for longer than 5 minutes continuously:

5 minute average system-load higher than CPU count * 10
memory usage higher than 95%