[mesos] 02/03: Implemented `cleanup` method of the `namespaces/ipc` isolator.

[gilbert]

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gilbert pushed a commit to branch master
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commit eb9af952d5f43d7f0b91ef01acc624e64d6c0ae7
Author: Qian Zhang <zhq527...@gmail.com>
AuthorDate: Fri Jul 12 00:40:09 2019 -0700

    Implemented `cleanup` method of the `namespaces/ipc` isolator.
    
    Review: https://reviews.apache.org/r/70844/
---
 .../containerizer/mesos/isolators/namespaces/ipc.cpp  | 19 +++++++++++++++++++
 .../containerizer/mesos/isolators/namespaces/ipc.hpp  |  3 +++
 2 files changed, 22 insertions(+)

diff --git a/src/slave/containerizer/mesos/isolators/namespaces/ipc.cpp 
b/src/slave/containerizer/mesos/isolators/namespaces/ipc.cpp
index 327827f..9a98476 100644
--- a/src/slave/containerizer/mesos/isolators/namespaces/ipc.cpp
+++ b/src/slave/containerizer/mesos/isolators/namespaces/ipc.cpp
@@ -322,6 +322,25 @@ Future<Option<ContainerLaunchInfo>> 
NamespacesIPCIsolatorProcess::prepare(
   return launchInfo;
 }
 
+
+Future<Nothing> NamespacesIPCIsolatorProcess::cleanup(
+      const ContainerID& containerId)
+{
+  const string shmPath = containerizer::paths::getContainerShmPath(
+      flags.runtime_dir, containerId);
+
+  if (os::exists(shmPath)) {
+    Try<Nothing> unmount = fs::unmount(shmPath);
+    if (unmount.isError()) {
+      return Failure(
+          "Failed to unmount container shared memory directory '" +
+          shmPath + "': " + unmount.error());
+    }
+  }
+
+  return Nothing();
+}
+
 } // namespace slave {
 } // namespace internal {
 } // namespace mesos {
diff --git a/src/slave/containerizer/mesos/isolators/namespaces/ipc.hpp 
b/src/slave/containerizer/mesos/isolators/namespaces/ipc.hpp
index 00c9d7e..ef252fe 100644
--- a/src/slave/containerizer/mesos/isolators/namespaces/ipc.hpp
+++ b/src/slave/containerizer/mesos/isolators/namespaces/ipc.hpp
@@ -39,6 +39,9 @@ public:
       const ContainerID& containerId,
       const mesos::slave::ContainerConfig& containerConfig) override;
 
+  process::Future<Nothing> cleanup(
+      const ContainerID& containerId) override;
+
 private:
   NamespacesIPCIsolatorProcess(const Flags& flags);