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From GitBox <...@apache.org>
Subject [GitHub] GJL commented on a change in pull request #6496: [FLINK-10063][tests] Use runit to supervise mesos processes.
Date Wed, 08 Aug 2018 06:44:50 GMT
GJL commented on a change in pull request #6496: [FLINK-10063][tests] Use runit to supervise
mesos processes.
URL: https://github.com/apache/flink/pull/6496#discussion_r208471471
 
 

 ##########
 File path: flink-jepsen/src/jepsen/flink/mesos.clj
 ##########
 @@ -24,11 +24,35 @@
             [jepsen.os.debian :as debian]
             [jepsen.flink.zookeeper :refer [zookeeper-uri]]))
 
+;;; runit process supervisor (http://smarden.org/runit/)
+;;;
+;;; We use runit to supervise Mesos processes because Mesos uses a "fail-fast" approach to
+;;; error handling, e.g., the Mesos master will exit when it discovers it has been partitioned
away
+;;; from the Zookeeper quorum.
+
+(def runit-version "2.1.2-3")
+
+(defn create-supervised-service!
+  "Registers a service with the process supervisor and starts it."
+  [service-name cmd]
+  (let [service-dir (str "/etc/sv/" service-name)
+        run-script (str service-dir "/run")]
+    (c/su
+      (c/exec :mkdir :-p service-dir)
+      (c/exec :echo (clojure.string/join "\n" ["#!/bin/sh" cmd]) :> run-script)
 
 Review comment:
   I'll fix this.

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