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Bug 1515261

Summary: api - doesn't reload configuration
Product: Red Hat Gluster Storage Reporter: Martin Kudlej <mkudlej>
Component: web-admin-tendrl-apiAssignee: Anup Nivargi <anivargi>
Status: CLOSED NOTABUG QA Contact: sds-qe-bugs
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rhgs-3.3CC: mkarnik, rhs-bugs, sankarshan
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Hardware: Unspecified   
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Last Closed: 2017-11-27 08:37:28 UTC Type: Bug
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Description Martin Kudlej 2017-11-20 13:02:34 UTC
Description of problem:
"systemctl reload" command doesn't reload API configuration()

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. get current date: $ date
2. get conf files for package: $ rpm -qc tendrl-api
3. reload configuration: $ systemctl reload tendrl-api
4. check if conf files from 2. are touched: $ find /etc/tendrl/ -type f | xargs stat | egrep '^Access: 2|File:'

Actual results:
"systemctl reload" doesn't reload service configuration.

Expected results:
"systemctl reload" reloads service configuration.

Comment 1 Martin Kudlej 2017-11-20 13:15:47 UTC
Cite from systemd documentation:
reload PATTERN...
           Asks all units listed on the command line to reload their
           configuration. Note that this will reload the service-specific
           configuration, not the unit configuration file of systemd. If you
           want systemd to reload the configuration file of a unit, use the
           daemon-reload command. In other words: for the example case of
           Apache, this will reload Apache's httpd.conf in the web server,
           not the apache.service systemd unit file.

           This command should not be confused with the daemon-reload

Comment 2 Mrugesh Karnik 2017-11-27 08:33:46 UTC
Online configuration reload isn't supported by the app server (puma) which serves the API. To do a configuration reload, it restarts the application processes, which does not align with what `systemctl reload` is supposed to do. As such, reload cannot be supported by the API.

In any case, the only configuration variable for the API itself (not to be confused with the configuration variables for the app server) is the etcd connection. Changing this requires a full restart of the API anyway.