YARN-7810. Update TestDockerContainerRuntime to test with current user credential.

                (contributed by Shane Kumpf)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/TestDockerContainerRuntime.java

@@ -81,7 +81,9 @@ public class TestDockerContainerRuntime {
   private HashMap<String, String> env;
   private String image;
   private String uidGidPair;
-  private String runAsUser;
+  private String runAsUser = System.getProperty("user.name");
+  private String[] groups = {};
+  private String groupGids;
   private String user;
   private String appId;
   private String containerIdStr = containerId;
@@ -130,8 +132,42 @@ public class TestDockerContainerRuntime {
     when(context.getEnvironment()).thenReturn(env);
     when(container.getUser()).thenReturn(submittingUser);
 
-    uidGidPair = "";
-    runAsUser = "run_as_user";
+    // Get the running user's uid and gid for remap
+    String uid = "";
+    String gid = "";
+    Shell.ShellCommandExecutor shexec1 = new Shell.ShellCommandExecutor(
+        new String[]{"id", "-u", runAsUser});
+    Shell.ShellCommandExecutor shexec2 = new Shell.ShellCommandExecutor(
+        new String[]{"id", "-g", runAsUser});
+    Shell.ShellCommandExecutor shexec3 = new Shell.ShellCommandExecutor(
+        new String[]{"id", "-G", runAsUser});
+    try {
+      shexec1.execute();
+      // get rid of newline at the end
+      uid = shexec1.getOutput().replaceAll("\n$", "");
+    } catch (Exception e) {
+      LOG.info("Could not run id -u command: " + e);
+    }
+    try {
+      shexec2.execute();
+      // get rid of newline at the end
+      gid = shexec2.getOutput().replaceAll("\n$", "");
+    } catch (Exception e) {
+      LOG.info("Could not run id -g command: " + e);
+    }
+    try {
+      shexec3.execute();
+      groups = shexec3.getOutput().replace("\n", " ").split(" ");
+    } catch (Exception e) {
+      LOG.info("Could not run id -G command: " + e);
+    }
+    uidGidPair = uid + ":" + gid;
+    StringBuilder sb = new StringBuilder();
+    for (String group : groups) {
+      sb.append(group).append(",");
+    }
+    groupGids = sb.toString().replaceAll(",$", "");
+
     user = "user";
     appId = "app_id";
     containerIdStr = containerId;
@@ -301,7 +337,7 @@ public class TestDockerContainerRuntime {
     List<String> dockerCommands = Files.readAllLines(Paths.get
             (dockerCommandFile), Charset.forName("UTF-8"));
 
-    int expected = 13;
+    int expected = 14;
     int counter = 0;
     Assert.assertEquals(expected, dockerCommands.size());
     Assert.assertEquals("[docker-command-execution]",
@@ -311,6 +347,8 @@ public class TestDockerContainerRuntime {
     Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
     Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
     Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
     Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(counter++));
     Assert
         .assertEquals("  image=busybox:latest", dockerCommands.get(counter++));
@@ -326,7 +364,7 @@ public class TestDockerContainerRuntime {
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
         dockerCommands.get(counter++));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
         dockerCommands.get(counter++));
   }
@@ -505,7 +543,7 @@ public class TestDockerContainerRuntime {
     //This is the expected docker invocation for this case
     List<String> dockerCommands = Files
         .readAllLines(Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
-    int expected = 13;
+    int expected = 14;
     int counter = 0;
     Assert.assertEquals(expected, dockerCommands.size());
     Assert.assertEquals("[docker-command-execution]",
@@ -515,6 +553,8 @@ public class TestDockerContainerRuntime {
     Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
     Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
     Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
     Assert.assertEquals("  hostname=test.hostname",
         dockerCommands.get(counter++));
     Assert
@@ -532,7 +572,7 @@ public class TestDockerContainerRuntime {
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
         dockerCommands.get(counter++));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
         dockerCommands.get(counter++));
   }
@@ -571,7 +611,7 @@ public class TestDockerContainerRuntime {
     List<String> dockerCommands = Files
         .readAllLines(Paths.get(dockerCommandFile), Charset.forName("UTF-8"));
 
-    int expected = 13;
+    int expected = 14;
     int counter = 0;
     Assert.assertEquals(expected, dockerCommands.size());
     Assert.assertEquals("[docker-command-execution]",
@@ -581,6 +621,8 @@ public class TestDockerContainerRuntime {
     Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
     Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
     Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
     Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(counter++));
     Assert
         .assertEquals("  image=busybox:latest", dockerCommands.get(counter++));
@@ -596,7 +638,7 @@ public class TestDockerContainerRuntime {
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
         dockerCommands.get(counter++));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
         dockerCommands.get(counter++));
 
@@ -624,6 +666,8 @@ public class TestDockerContainerRuntime {
     Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
     Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
     Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
     Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(counter++));
     Assert
         .assertEquals("  image=busybox:latest", dockerCommands.get(counter++));
@@ -640,7 +684,7 @@ public class TestDockerContainerRuntime {
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
         dockerCommands.get(counter++));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
         dockerCommands.get(counter++));
 
@@ -677,7 +721,7 @@ public class TestDockerContainerRuntime {
     List<String> dockerCommands = Files.readAllLines(Paths.get
         (dockerCommandFile), Charset.forName("UTF-8"));
 
-    int expected = 13;
+    int expected = 14;
     Assert.assertEquals(expected, dockerCommands.size());
 
     String command = dockerCommands.get(0);
@@ -786,7 +830,7 @@ public class TestDockerContainerRuntime {
     List<String> dockerCommands = Files.readAllLines(Paths.get
         (dockerCommandFile), Charset.forName("UTF-8"));
 
-    int expected = 14;
+    int expected = 15;
     int counter = 0;
     Assert.assertEquals(expected, dockerCommands.size());
     Assert.assertEquals("[docker-command-execution]",
@@ -796,6 +840,8 @@ public class TestDockerContainerRuntime {
     Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
     Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
     Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
     Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(counter++));
     Assert
         .assertEquals("  image=busybox:latest", dockerCommands.get(counter++));
@@ -812,7 +858,7 @@ public class TestDockerContainerRuntime {
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
         dockerCommands.get(counter++));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
         dockerCommands.get(counter++));
   }
@@ -903,33 +949,39 @@ public class TestDockerContainerRuntime {
     List<String> dockerCommands = Files.readAllLines(Paths.get
         (dockerCommandFile), Charset.forName("UTF-8"));
 
-    Assert.assertEquals(14, dockerCommands.size());
-    Assert.assertEquals("[docker-command-execution]", dockerCommands.get(0));
+    int expected = 15;
+    int counter = 0;
+    Assert.assertEquals(expected, dockerCommands.size());
+    Assert.assertEquals("[docker-command-execution]",
+        dockerCommands.get(counter++));
     Assert.assertEquals("  cap-add=SYS_CHROOT,NET_BIND_SERVICE",
-        dockerCommands.get(1));
-    Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(2));
-    Assert.assertEquals("  detach=true", dockerCommands.get(3));
-    Assert.assertEquals("  docker-command=run", dockerCommands.get(4));
-    Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(5));
-    Assert.assertEquals("  image=busybox:latest", dockerCommands.get(6));
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
+    Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
+    Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(counter++));
+    Assert.assertEquals("  image=busybox:latest",
+        dockerCommands.get(counter++));
     Assert.assertEquals(
         "  launch-command=bash,/test_container_work_dir/launch_container.sh",
-        dockerCommands.get(7));
-    Assert.assertEquals("  name=container_id", dockerCommands.get(8));
-    Assert.assertEquals("  net=host", dockerCommands.get(9));
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  name=container_id", dockerCommands.get(counter++));
+    Assert.assertEquals("  net=host", dockerCommands.get(counter++));
     Assert.assertEquals(
         "  ro-mounts=/test_local_dir/test_resource_file:test_mount",
-        dockerCommands.get(10));
+        dockerCommands.get(counter++));
     Assert.assertEquals(
         "  rw-mounts=/test_container_local_dir:/test_container_local_dir,"
             + "/test_filecache_dir:/test_filecache_dir,"
             + "/test_container_work_dir:/test_container_work_dir,"
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
-        dockerCommands.get(11));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(12));
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
-        dockerCommands.get(13));
+        dockerCommands.get(counter));
   }
 
   @Test
@@ -973,34 +1025,40 @@ public class TestDockerContainerRuntime {
     List<String> dockerCommands = Files.readAllLines(Paths.get
         (dockerCommandFile), Charset.forName("UTF-8"));
 
-    Assert.assertEquals(14, dockerCommands.size());
-    Assert.assertEquals("[docker-command-execution]", dockerCommands.get(0));
+    int expected = 15;
+    int counter = 0;
+    Assert.assertEquals(expected, dockerCommands.size());
+    Assert.assertEquals("[docker-command-execution]",
+        dockerCommands.get(counter++));
     Assert.assertEquals("  cap-add=SYS_CHROOT,NET_BIND_SERVICE",
-        dockerCommands.get(1));
-    Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(2));
-    Assert.assertEquals("  detach=true", dockerCommands.get(3));
-    Assert.assertEquals("  docker-command=run", dockerCommands.get(4));
-    Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(5));
-    Assert.assertEquals("  image=busybox:latest", dockerCommands.get(6));
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  cap-drop=ALL", dockerCommands.get(counter++));
+    Assert.assertEquals("  detach=true", dockerCommands.get(counter++));
+    Assert.assertEquals("  docker-command=run", dockerCommands.get(counter++));
+    Assert.assertEquals("  group-add=" + groupGids,
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  hostname=ctr-id", dockerCommands.get(counter++));
+    Assert.assertEquals("  image=busybox:latest",
+        dockerCommands.get(counter++));
     Assert.assertEquals(
         "  launch-command=bash,/test_container_work_dir/launch_container.sh",
-        dockerCommands.get(7));
-    Assert.assertEquals("  name=container_id", dockerCommands.get(8));
-    Assert.assertEquals("  net=host", dockerCommands.get(9));
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  name=container_id", dockerCommands.get(counter++));
+    Assert.assertEquals("  net=host", dockerCommands.get(counter++));
     Assert.assertEquals(
         "  ro-mounts=/test_local_dir/test_resource_file:test_mount1,"
             + "/test_local_dir/test_resource_file:test_mount2",
-        dockerCommands.get(10));
+        dockerCommands.get(counter++));
     Assert.assertEquals(
         "  rw-mounts=/test_container_local_dir:/test_container_local_dir,"
             + "/test_filecache_dir:/test_filecache_dir,"
             + "/test_container_work_dir:/test_container_work_dir,"
             + "/test_container_log_dir:/test_container_log_dir,"
             + "/test_user_local_dir:/test_user_local_dir",
-        dockerCommands.get(11));
-    Assert.assertEquals("  user=run_as_user", dockerCommands.get(12));
+        dockerCommands.get(counter++));
+    Assert.assertEquals("  user=" + uidGidPair, dockerCommands.get(counter++));
     Assert.assertEquals("  workdir=/test_container_work_dir",
-        dockerCommands.get(13));
+        dockerCommands.get(counter));
 
   }
 
@@ -1020,7 +1078,7 @@ public class TestDockerContainerRuntime {
     PrivilegedOperation op = capturePrivilegedOperation();
     Assert.assertEquals(op.getOperationType(),
         PrivilegedOperation.OperationType.SIGNAL_CONTAINER);
-    Assert.assertEquals("run_as_user", op.getArguments().get(0));
+    Assert.assertEquals(runAsUser, op.getArguments().get(0));
     Assert.assertEquals("user", op.getArguments().get(1));
     Assert.assertEquals("2", op.getArguments().get(2));
     Assert.assertEquals("1234", op.getArguments().get(3));