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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-10465) Jepsen: runit supervised sshd is stopped on tear down
Date Mon, 08 Oct 2018 13:17:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-10465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16641817#comment-16641817
] 

ASF GitHub Bot commented on FLINK-10465:
----------------------------------------

StefanRRichter commented on a change in pull request #6779: [FLINK-10465][tests] Do not stop
sshd if it is supervised by runit.
URL: https://github.com/apache/flink/pull/6779#discussion_r223358568
 
 

 ##########
 File path: flink-jepsen/src/jepsen/flink/utils.clj
 ##########
 @@ -86,4 +86,7 @@
   []
   (info "Stop all supervised services.")
   (c/su
-    (c/exec :rm :-f (c/lit (str "/etc/service/*")))))
+    ;; HACK:
+    ;; Remove all symlinks in /etc/service except sshd.
+    ;; This is only relevant when tests are run in Docker because there sshd is started using
runit.
+    (c/exec :find (c/lit (str "/etc/service -maxdepth 1 -type l ! -name 'sshd' -delete")))))
 
 Review comment:
   I wonder if excluding by name is not already good enough?

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> Jepsen: runit supervised sshd is stopped on tear down
> -----------------------------------------------------
>
>                 Key: FLINK-10465
>                 URL: https://issues.apache.org/jira/browse/FLINK-10465
>             Project: Flink
>          Issue Type: Bug
>          Components: Tests
>    Affects Versions: 1.7.0, 1.6.2
>            Reporter: Gary Yao
>            Assignee: Gary Yao
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: 1.7.0, 1.6.2
>
>
> When tearing down the _DB_, we tear down all services supervised by runit. However when
running the tests in Docker, sshd is under supervision by runit. When sshd is stopped, the
tests cannot be continued because the control node cannot interact with the DB nodes anymore.
> *How to reproduce*
> Run command below in control-node container:
> {code}
> ./docker/run-tests.sh 1 [...]/flink/flink-1.6.1/flink-1.6.1-bin-hadoop28-scala_2.11.tgz
> {code}
> *Expected behavior*
> sshd should never be stopped



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