[jira] [Commented] (IMPALA-9790) Dockerized daemons should set --hostname to the resolved IP

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-9790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17146603#comment-17146603 ] 

ASF subversion and git services commented on IMPALA-9790:
---------------------------------------------------------

Commit a11b8b687a97c25d1df09cab4d0bb5d2101cbada in impala's branch refs/heads/master from Tim Armstrong
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=a11b8b6 ]

IMPALA-9790: option to use resolved hostname everywhere

This adds a flag --use_resolved_hostname, which replaces
--hostname with a resolved IP on startup. This is useful
for containerized environments where the hostname -> IP
mapping can be very dynamic.

This flag is used by default in the dockerized minicluster.

This also fixes a bug in the test code that incorrectly
identified command line flags. Specifically it only checked
the suffix, so it confused use_resolved_hostname and hostname.

Change-Id: I0d5cb9c68c60ce8dc838cde9dcf1c590017f5c9a
Reviewed-on: http://gerrit.cloudera.org:8080/16108
Tested-by: Impala Public Jenkins <im...@cloudera.com>
Reviewed-by: Andrew Sherman <as...@cloudera.com>


> Dockerized daemons should set --hostname to the resolved IP
> -----------------------------------------------------------
>
>                 Key: IMPALA-9790
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9790
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Infrastructure
>            Reporter: Tim Armstrong
>            Assignee: Tim Armstrong
>            Priority: Major
>             Fix For: Impala 4.0
>
>
> In light of IMPALA-9788 (and also IMPALA-9026), it probably makes the most sense to avoid using hostnames for internal communication in containerized setups, since container orchestration frameworks tend to do non-trivial things with DNS and hostnames. 
> We can do this in the entrypoint script. I tried --hostname=$(hostname -I) and it seemed to work. It might need some improvement to handle cases when there are multiple IPs, etc.



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