string getExecutorHttpMarkerPath(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId)
{
return path::join(
getExecutorRunPath(
rootDir,
slaveId,
frameworkId,
executorId,
containerId),
HTTP_MARKER_FILE);
}
string getExecutorSentinelPath(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId)
{
return path::join(
getExecutorRunPath(
rootDir,
slaveId,
frameworkId,
executorId,
containerId),
EXECUTOR_SENTINEL_FILE);
}
Try<list<string>> getTaskPaths(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId)
{
return fs::list(path::join(
getExecutorRunPath(
rootDir,
slaveId,
frameworkId,
executorId,
containerId),
"tasks",
"*"));
}
string getForkedPidPath(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId)
{
return path::join(
getExecutorRunPath(
rootDir,
slaveId,
frameworkId,
executorId,
containerId),
"pids",
FORKED_PID_FILE);
}
string getLibprocessPidPath(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId)
{
return path::join(
getExecutorRunPath(
rootDir,
slaveId,
frameworkId,
executorId,
containerId),
"pids",
LIBPROCESS_PID_FILE);
}
string getTaskPath(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId,
const TaskID& taskId)
{
return path::join(
getExecutorRunPath(
rootDir,
slaveId,
frameworkId,
executorId,
containerId),
"tasks",
stringify(taskId));
}
string createExecutorDirectory(
const string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId,
const Option<string>& user)
{
// These IDs should be valid as they are either assigned by the
// master/agent or validated by the master but we do a sanity check
// here before using them to create a directory.
CHECK_NONE(common::validation::validateSlaveID(slaveId));
CHECK_NONE(common::validation::validateFrameworkID(frameworkId));
CHECK_NONE(common::validation::validateExecutorID(executorId));
CHECK_NONE(slave::validation::container::validateContainerId(containerId));
const string directory =
getExecutorRunPath(rootDir, slaveId, frameworkId, executorId, containerId);
Try<Nothing> mkdir = os::mkdir(directory);
CHECK_SOME(mkdir)
<< "Failed to create executor directory '" << directory << "'";
// Remove the previous "latest" symlink.
const string latest =
getExecutorLatestRunPath(rootDir, slaveId, frameworkId, executorId);
if (os::exists(latest)) {
CHECK_SOME(os::rm(latest))
<< "Failed to remove latest symlink '" << latest << "'";
}
// Symlink the new executor directory to "latest".
Try<Nothing> symlink = ::fs::symlink(directory, latest);
CHECK_SOME(symlink)
<< "Failed to symlink directory '" << directory
<< "' to '" << latest << "'";
// `os::chown()` is not available on Windows.
#ifndef __WINDOWS__
if (user.isSome()) {
// Per MESOS-2592, we need to set the ownership of the executor
// directory during its creation. We should not rely on subsequent
// phases of the executor creation to ensure the ownership as
// those may be conditional and in some cases leave the executor
// directory owned by the slave user instead of the specified
// framework or per-executor user.
LOG(INFO) << "Trying to chown '" << directory << "' to user '"
<< user.get() << "'";
Try<Nothing> chown = os::chown(user.get(), directory);
if (chown.isError()) {
// TODO(nnielsen): We currently have tests which depend on using
// user names which may not be available on the test machines.
// Therefore, we cannot make the chown validation a hard
// CHECK().
LOG(WARNING) << "Failed to chown executor directory '" << directory
<< "'. This may be due to attempting to run the executor "
<< "as a nonexistent user on the agent; see the description"
<< " for the `--switch_user` flag for more information: "
<< chown.error();
}
}
#endif // __WINDOWS__
return directory;
}