I’ve demonstrated a few InfluxDB commands in my Getting to know InfluxDB and InfluxDB: Retention Policies & Shard Groups posts but though it would be a good idea to write a post completely dedicated to useful CLI commands – so here it is.
SHOW DATABASES
This command is self explanatory. It lists all of your InfluxDB databases:
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> SHOW DATABASES name: databases name ---- telegraf _internal |
USE <DATBASE_NAME>
Enters a database so that subsequent commands will be run against it:
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> USE telegraf Using database telegraf |
SHOW MEASUREMENTS
Gets a list of measurements that reside in a database:
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> SHOW MEASUREMENTS name: measurements name ---- cpu disk diskio kernel mem processes snmp swap system |
CLAUSES
Clauses are extremely useful when you’re looking for specific information. You can read more about them in InfluxDB’s Data Exploration documentation. Some will be used in the subsequent sections of this post.
SHOW FIELD KEYS
Lists the data that is being recorded in each measurement :
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> SHOW TAG KEYS FROM snmp,cpu name: cpu tagKey ------ cpu host name: snmp tagKey ------ agent_host host hostname ifName |
SHOW TAG KEYS
Lists the the tags which are being used in each measurement :
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> SHOW TAG KEYS FROM snmp name: snmp tagKey ------ agent_host host hostname ifName |
SHOW TAG VALUES
View tags values:
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> SHOW TAG VALUES FROM snmp WITH KEY = "hostname" name: snmp key value --- ----- hostname R1 hostname R2 |
SHOW SERIES
Lists all series in the database ( measurement, tag keys and tag values):
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> SHOW SERIES FROM snmp,cpu key --- cpu,cpu=cpu-total,host=ubuntu cpu,cpu=cpu0,host=ubuntu cpu,cpu=cpu1,host=ubuntu snmp,agent_host=192.168.0.242,host=ubuntu,hostname=R1,ifName=Fa0/0 snmp,agent_host=192.168.0.242,host=ubuntu,hostname=R1,ifName=Fa0/1 snmp,agent_host=192.168.0.242,host=ubuntu,hostname=R1,ifName=Nu0 snmp,agent_host=192.168.0.243,host=ubuntu,hostname=R2,ifName=Fa0/0 snmp,agent_host=192.168.0.243,host=ubuntu,hostname=R2,ifName=Fa0/1 snmp,agent_host=192.168.0.243,host=ubuntu,hostname=R2,ifName=Nu0 |
For example, in the above output snmp is a measurement, agent_host, host, hostname and ifName are all key tags and 192.168.0.242, ubuntu, R2 and Fa0/1 are all key values.
SELECT
Displays information that matches your query. Note that both Field Keys and Tag Keys are used in the query below:
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> select hostname,ifHCOutOctets,ifHCInOctets from snmp where ifName='Fa0/0' and time > now() - 30s name: snmp time hostname ifHCOutOctets ifHCInOctets ---- -------- ------------- ------------ 1497178820000000000 R1 12390993 6913565 1497178820000000000 R2 12015097 6785158 1497178830000000000 R1 12396313 6916122 1497178830000000000 R2 12020416 6787715 1497178840000000000 R1 12402045 6919251 |
Further Reading
The InfluxDB’s Schema Exploration documentation has numerous commands and outputs which are worth taking a look at. The Influx Query Language documentation is also well worth a read.
Knowledge Base
See my Knowledge Base for more information.
As always, if you have any questions or have a topic that you would like me to discuss, please feel free to post a comment at the bottom of this blog entry, e-mail at will@oznetnerd.com, or drop me a message on Twitter (@OzNetNerd).
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