Github user addisonj commented on a diff in the pull request: https://github.com/apache/flink/pull/3481#discussion_r108790880 --- Diff: flink-mesos/src/main/java/org/apache/flink/mesos/runtime/clusterframework/MesosTaskManagerParameters.java --- @@ -162,11 +182,65 @@ public static MesosTaskManagerParameters create(Configuration flinkConfig) { throw new IllegalConfigurationException("invalid container type: " + containerTypeString); } + Option<String> containerVolOpt = Option.<String>apply(flinkConfig.getString(MESOS_RM_CONTAINER_VOLUMES)); + List<Protos.Volume> containerVolumes = buildVolumes(containerVolOpt); + return new MesosTaskManagerParameters( cpus, containerType, Option.apply(imageName), - containeredParameters); + containeredParameters, + containerVolumes); + } + + /** + * Used to build volume specs for mesos. This allows for mounting additional volumes into a container + * + * @param containerVolumes a comma delimited optional string of [host_path:]container_path[:RO|RW] that + * defines mount points for a container volume. If None or empty string, returns + * an empty iterator + */ + public static List<Protos.Volume> buildVolumes(Option<String> containerVolumes) { + if (containerVolumes.isEmpty()) { + return new ArrayList<Protos.Volume>(); + } + String[] specs = containerVolumes.get().split(","); + List<Protos.Volume> vols = new ArrayList<Protos.Volume>(); + for (String s : specs) { + if (s.trim().isEmpty()) { + continue; + } + Protos.Volume.Builder vol = Protos.Volume.newBuilder(); + vol.setMode(Protos.Volume.Mode.RW); + + String[] parts = s.split(":"); + switch (parts.length) { + case 1: + vol.setContainerPath(parts[0]); + break; + case 2: + try { + Protos.Volume.Mode mode = Protos.Volume.Mode.valueOf(parts[1].trim().toUpperCase()); + vol.setMode(mode) + .setContainerPath(parts[0]); + } catch (IllegalArgumentException e) { --- End diff -- totally agree, it is strange. But this is the same spec that docker CLI uses as well as the spark mesos framework... It doesn't seem ideal and is definitely somewhat of a sharp edge but seemed best to just use the same standard
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