Regarding Setting High Retension for storage

[Aravind Viswanathan]

Hi All,

I am new to Prometheus and noticed that the data in my Prometheus Server is defaulted to 15days and we would like to have the data for more than 1Y.

I have updated my configuration to ,

[Unit]

  Description=Prometheus Monitoring

  Wants=network-online.target

  After=network-online.target

[Service]

  User=prometheus

  Group=prometheus

  Type=simple

  ExecStart=/usr/local/bin/prometheus \

  --config.file /etc/prometheus/prometheus.yml \

  --storage.tsdb.path /var/lib/prometheus/ \

  --web.console.templates=/etc/prometheus/consoles \

  --web.console.libraries=/etc/prometheus/console_libraries

  ExecReload=/bin/kill -HUP $MAINPID

  --storage.tsdb.retention.time=1y

[Install]

  WantedBy=multi-user.target

~

~

Then i restarted Prometheus Service in Ubuntu

Navigated to status >> Runtime and Build Information i see

Storage Retention  as 15 Days

Also, navigated to  command line flags and i still see 

storage.tsdb.retention : 0s

storage.tsdb.retention.size : 0s

storage.tsdb.retention.time : 0s.

Is there something that i am missing?

Regards

Aravind Viswanathan. 

[Brian Candler]

Yes, you put the flag in the wrong place.  Add it to the end of the ExecStart line, not to the ExecReload line.

[Aravind Viswanathan]

Thanks Brian,

Is this Correct?

[Unit]
  Description=Prometheus Monitoring
  Wants=network-online.target
  After=network-online.target

[Service]
  User=prometheus
  Group=prometheus
  Type=simple
  ExecStart=/usr/local/bin/prometheus \
  --config.file /etc/prometheus/prometheus.yml \
  --storage.tsdb.path /var/lib/prometheus/ \
  --web.console.templates=/etc/prometheus/consoles \
  --web.console.libraries=/etc/prometheus/console_libraries

  --storage.tsdb.retention.time=1y
  ExecReload=/bin/kill -HUP $MAINPID
 

[Install]
  WantedBy=multi-user.target
~
~

On Tue, Sep 8, 2020 at 3:20 PM Brian Candler <b.ca...@pobox.com> wrote:

Yes, you put the flag in the wrong place.  Add it to the end of the ExecStart line, not to the ExecReload line.

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Thanks                                                                 

Aravind.V

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Email : v_6...@hotmail.com, arw...@gmail.com

[Brian Candler]

Not quite.  Since you're splitting the command line over multiple lines, you need a trailing space and backslash after "console_libraries" to join it to the next line.

[Aravind Viswanathan]

Hi Brian,

Thanks for the help.

OK After i did that and restarting the services I see the following under Command-Line Flags,

storage.tsdb.retention  : 0s

storage.tsdb.retention.size : 0B

storage.tsdb.retention.time: 1y

Is that correct or do I need to make any other configuration changes?

Regards

Aravind Viswanathan.

 

On Tue, Sep 8, 2020 at 5:57 PM Brian Candler <b.ca...@pobox.com> wrote:

Not quite.  Since you're splitting the command line over multiple lines, you need a trailing space and backslash after "console_libraries" to join it to the next line.

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[Brian Candler]

The storage retention change is complete.