#In this tutorial, we get started with InfluxDB. we can use commands with InfluxDB. In the latter-mentioned post, I created a “telegraf” database in InfluxDB.
Let’s know if InfluxDB getting started
Now jump into InfluxDB.
[root@devopsroles.localhost ~]# influx
Connected to http://localhost:8086 version 1.7.4
InfluxDB shell version: 1.7.4
Enter an InfluxQL query
> View a list of all the databases using the “show databases” command.
> show databases
name: databases
name
----
_internal
netdata
monitoring
telegraf
opentsdb
> “_internal” is an internal InfluxDB database. To use telegraf database the “use telegraf” command:
> use telegraf
Using database telegrafNow we are inside of the telegraf database. using the “show measurements” command:
> show measurements
name: measurements
name
----
cpu
disk
diskio
kernel
mem
processes
swap
systemField Keys in the telegraf database.
> show field keys
name: cpu
fieldKey fieldType
-------- ---------
usage_guest float
usage_guest_nice float
usage_idle float
usage_iowait float
usage_irq float
usage_nice float
usage_softirq float
usage_steal float
usage_system float
usage_user float
name: disk
fieldKey fieldType
-------- ---------
free integer
inodes_free integer
inodes_total integer
inodes_used integer
total integer
used integer
used_percent float
name: diskio
fieldKey fieldType
-------- ---------
io_time integer
iops_in_progress integer
read_bytes integer
read_time integer
reads integer
weighted_io_time integer
write_bytes integer
write_time integer
writes integer
name: kernel
fieldKey fieldType
-------- ---------
boot_time integer
context_switches integer
entropy_avail integer
interrupts integer
processes_forked integer
name: mem
fieldKey fieldType
-------- ---------
active integer
available integer
available_percent float
buffered integer
cached integer
commit_limit integer
committed_as integer
dirty integer
free integer
high_free integer
high_total integer
huge_page_size integer
huge_pages_free integer
huge_pages_total integer
inactive integer
low_free integer
low_total integer
mapped integer
page_tables integer
shared integer
slab integer
swap_cached integer
swap_free integer
swap_total integer
total integer
used integer
used_percent float
vmalloc_chunk integer
vmalloc_total integer
vmalloc_used integer
wired integer
write_back integer
write_back_tmp integer
name: processes
fieldKey fieldType
-------- ---------
blocked integer
dead integer
idle integer
paging integer
running integer
sleeping integer
stopped integer
total integer
total_threads integer
unknown integer
zombies integer
name: swap
fieldKey fieldType
-------- ---------
free integer
in integer
out integer
total integer
used integer
used_percent float
name: system
fieldKey fieldType
-------- ---------
load1 float
load15 float
load5 float
n_cpus integer
n_users integer
uptime integer
uptime_format stringTag Keys in the telegraf database.
> show tag keys
name: cpu
tagKey
------
cpu
host
name: disk
tagKey
------
device
fstype
host
mode
path
name: diskio
tagKey
------
host
name
name: kernel
tagKey
------
host
name: mem
tagKey
------
host
name: processes
tagKey
------
host
name: swap
tagKey
------
host
name: system
tagKey
------
hostInfluxDB Queries
How fields and tags work together. For example as below
> select * from cpu where time > now() - 10s
name: cpu
time cpu host usage_guest usage_guest_nice usage_idle usage_iowait usage_irq usage_nice usage_softirq usage_steal usage_system usage_user
---- --- ---- ----------- ---------------- ---------- ------------ --------- ---------- ------------- ----------- ------------ ----------
1557722520000000000 cpu-total devopsroles.localhost 0 0 92.4924924924855 6.106106106081209 0 0 0 0 0.30030030030030713 1.10110110109885
1557722520000000000 cpu0 devopsroles.localhost 0 0 92.4924924924855 6.106106106081209 0 0 0 0 0.30030030030030713 1.10110110109885
> select * from cpu where cpu='cpu-total' and host='devopsroles.localhost' and time > now() - 10s
name: cpu
time cpu host usage_guest usage_guest_nice usage_idle usage_iowait usage_irq usage_nice usage_softirq usage_steal usage_system usage_user
---- --- ---- ----------- ---------------- ---------- ------------ --------- ---------- ------------- ----------- ------------ ----------
1557727830000000000 cpu-total devopsroles.localhost 0 0 96.7967967967239 2.402402402420665 0 0 0 0 0.20020020020020476 0.6006006006006143
> select usage_user,cpu,host from cpu where cpu='cpu-total' and host='devopsroles.localhost' and time > now() - 20s
name: cpu
time usage_user cpu host
---- ---------- --- ----
1557727930000000000 1.6016016016016381 cpu-total devopsroles.localhostLink Documentation about Influxdb getting started
Series is a “collection of data in InfluxDB’s data structure that share a measurement, tag set, and retention policy.” Thank you for reading the DevopsRoles page!InfluxDB documentation.
Indexing InfluxDB documentation
Glossary InfluxDB documentation
Schema Design InfluxDB documentation
Influxdb getting started. Influxdb getting started. Influxdb getting started.
