InfluxDB : Backup and Restore2023/07/06

	This is how to back up and restore InfluxDB database.
[1]	Back up a database.

# backup [test_database] to [/home/influxd_backup]

root@dlp:~#

influxd backup -database test_database /home/influxd_backup

2023/07/05 19:17:06 backing up metastore to /home/influxd_backup/meta.00
2023/07/05 19:17:06 backing up db=test_database
2023/07/05 19:17:06 backing up db=test_database rp=autogen shard=4 to /home/influxd_backup/test_database.autogen.00004.00 since 0001-01-01T00:00:00Z
2023/07/05 19:17:06 backup complete:
2023/07/05 19:17:06     /home/influxd_backup/home/influxd_backup/meta.00
2023/07/05 19:17:06     /home/influxd_backup/home/influxd_backup/test_database.autogen.00004.00

root@dlp:~#

ll /home/influxd_backup

total 8
-rw-r--r-- 1 root root  515 Jul  5 19:17 meta.00
-rw-r--r-- 1 root root 2048 Jul  5 19:17 test_database.autogen.00004.00

# possible to backup specific retention policy or retention duration like follows

root@dlp:~#

influxd backup -database test_database -retention one_day -since 2023-07-05T00:00:00Z /home/influxd_backup

[2]	Restore a Backup database.

# stop service before restoring

root@dlp:~#

systemctl stop influxdb

# run restore command
# [-metadir] : target directory meta data is restored (follow is the default location)
# [-datadir] : target directory database is restored (follow is the default location)
# [-database] : target database name restored

root@dlp:~#

influxd restore -metadir /var/lib/influxdb/meta -datadir /var/lib/influxdb/data -database test_database /home/influxd_backup

Using metastore snapshot: /home/influxd_backup/meta.00
2023/07/05 19:18:40 Restoring offline from backup /home/influxd_backup/test_database.*

root@dlp:~#

chown -R influxdb:influxdb /var/lib/influxdb/{meta,data}

root@dlp:~#

systemctl start influxdb

# verify resotored data

root@dlp:~#

influx -username admin -password adminpassword -database test_database -precision rfc3339 -execute 'select * from weather'

name: weather
time                           location  temperature
----                           --------  -----------
2023-07-06T00:23:11.525199905Z hiroshima 20
2023-07-06T00:23:15.061760047Z hiroshima 22
2023-07-06T00:23:18.382129025Z osaka     18
2023-07-06T00:23:22.790775012Z osaka     19

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