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https://issues.apache.org/jira/browse/AMBARI-14690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177972#comment-15177972
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Sebastian Toader commented on AMBARI-14690:
-------------------------------------------
Committed to trunk:
{code}
commit 492a305409a26f687e55be7be624b9e95ce422d7
Author: Toader, Sebastian <[email protected]>
Date: Thu Mar 3 16:36:27 2016 +0100
AMBARI-14690. Configurable system resource values for ambari-agent. (Oliver
Szabo via stoader)
{code}
Committed to branch-2.2:
{code}
commit c509bc26de18ab77fa6943e1b818c4071fe16f1b
Author: Toader, Sebastian <[email protected]>
Date: Thu Mar 3 16:36:27 2016 +0100
AMBARI-14690. Configurable system resource values for ambari-agent. (Oliver
Szabo via stoader)
{code}
> Configurable system resource values for ambari-agent
> ----------------------------------------------------
>
> Key: AMBARI-14690
> URL: https://issues.apache.org/jira/browse/AMBARI-14690
> Project: Ambari
> Issue Type: Improvement
> Components: ambari-agent
> Affects Versions: 2.2.0
> Reporter: Olivér Szabó
> Assignee: Olivér Szabó
> Fix For: 2.2.2
>
> Attachments: AMBARI-14690_v7.patch, AMBARI-14690_v8.patch
>
>
> When an ambari agent starts, host system details are registered into ambari
> server database. These values are calculated by ambari-agents based on
> different files on the hosts (e.g : /proc/meminfo).
> In some cases it isn't a correct behavior: If ambari-agent is in a
> docker-container, it will see the same memory/cpu details. (stack advisor
> also uses these values, its possible stack advisor can recommend a too high
> memory value for some services)
> Solution: Configurable system resources for hosts (ambari-agent).
> Added new option to 'agent' section in ambari-agent.ini:
> system_resource_overrides. It points to a directory, if the value/directory
> does not exist or empty, it will use the default behavior
> {code:java}
> [agent]
> ...
> system_resource_overrides=/etc/resource_overrides
> ...
> {code}
> It reads all json files from that directory. JSON structure looks like this:
> {code:java}
> {
> "memoryfree" : "15600",
> "memorytotal" : ....
> }
> {code}
> In ambari-agent Facter.py set these values, all of the factor info values can
> be redefined in one or multiple JSON files.
> That means ambari is not responsible to gather these values from the system.
> - use case:
> During 'docker run' , before 'ambari-agent start',
> 'system_resource_overrides' value can be overwritten, or the default
> ('/etc/resource_overrides') can be mount with '-v' flag (docker run -v
> /my/path:/etc/resource_overrides).
> Facter.py is called during ambari-agent start, so if the values will be
> modified later, ambari-agent needs to be restarted.
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