add info on how to manage metrics

infrastructure-guide/influx00.md

@@ -36,6 +36,60 @@ Data is stored at `/var/lib/influxdb` "locally" on the virtual machine.
 The influx configuration can be found `/etc/influxdb/influxdb.conf`
 
 
+# Administration
+
+Connect to the influx server
+```
+ssh influx.psi.ch
+```
+
+Connect to the influx database:
+```
+influx
+```
+
+Now you should have the prompt of the influx cli client
+
+
+Show all databases
+```
+show databases
+```
+
+Switch to a database:
+```
+use "database_name"
+```
+
+Show all measurements
+```
+show measurements
+```
+
+Show all series (of all measurements)
+```
+show series
+```
+
+Show all series for a particular host:
+```
+show series where "host" = 'puppet00.psi.ch'
+```
+
+Delete all series for a particular host:
+```
+DROP SERIES FROM /.*/ WHERE "host" = 'puppet00.psi.ch'
+```
+
+
+If there is a new influx database (telegraf_XXXX) this source has to be explicitly added to the metrics server
+
+For this, connect to: 
+* https://metrics.psi.ch
+* Login
+* ![](add_new_metric_source.png)
+
+
 
 # Questions
 - Is there a more detailed documenation/script/playbook that descibes the setup of this server?