/
paths.hpp
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/
paths.hpp
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef __SLAVE_PATHS_HPP__
#define __SLAVE_PATHS_HPP__
#include <list>
#include <string>
#include <mesos/mesos.hpp>
namespace mesos {
namespace internal {
namespace slave {
namespace paths {
// The slave leverages the file system for a number of purposes:
//
// (1) For executor sandboxes and disk volumes.
//
// (2) For checkpointing metadata in order to support "slave
// recovery". That is, allow the slave to restart without
// affecting the tasks / executors.
//
// (3) To detect reboots (by checkpointing the boot id), in which
// case everything has died so no recovery should be attempted.
//
// (4) For checkpointing resources that persist across slaves.
// This includes things like persistent volumes and dynamic
// reservations.
//
// (5) For provisioning root filesystems for containers.
//
// The file system layout is as follows:
//
// root ('--work_dir' flag)
// |-- slaves
// | |-- latest (symlink)
// | |-- <slave_id>
// | |-- frameworks
// | |-- <framework_id>
// | |-- executors
// | |-- <executor_id>
// | |-- runs
// | |-- latest (symlink)
// | |-- <container_id> (sandbox)
// |-- meta
// | |-- slaves
// | |-- latest (symlink)
// | |-- <slave_id>
// | |-- slave.info
// | |-- frameworks
// | |-- <framework_id>
// | |-- framework.info
// | |-- framework.pid
// | |-- executors
// | |-- <executor_id>
// | |-- executor.info
// | |-- runs
// | |-- latest (symlink)
// | |-- <container_id> (sandbox)
// | |-- executor.sentinel (if completed)
// | |-- pids
// | | |-- forked.pid
// | | |-- libprocess.pid
// | |-- tasks
// | |-- <task_id>
// | |-- task.info
// | |-- task.updates
// |-- boot_id
// |-- resources
// | |-- resources.info
// |-- volumes
// | |-- roles
// | |-- <role>
// | |-- <persistence_id> (persistent volume)
// |-- provisioner
const char LATEST_SYMLINK[] = "latest";
// Helpers for obtaining paths in the layout:
std::string getMetaRootDir(const std::string& rootDir);
std::string getSandboxRootDir(const std::string& rootDir);
std::string getProvisionerDir(const std::string& rootDir);
std::string getArchiveDir(const std::string& rootDir);
std::string getLatestSlavePath(const std::string& rootDir);
std::string getBootIdPath(const std::string& rootDir);
std::string getSlaveInfoPath(
const std::string& rootDir,
const SlaveID& slaveId);
std::string getSlavePath(
const std::string& rootDir,
const SlaveID& slaveId);
Try<std::list<std::string>> getFrameworkPaths(
const std::string& rootDir,
const SlaveID& slaveId);
std::string getFrameworkPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId);
std::string getFrameworkPidPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId);
std::string getFrameworkInfoPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId);
Try<std::list<std::string>> getExecutorPaths(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId);
std::string getExecutorPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId);
std::string getExecutorInfoPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId);
Try<std::list<std::string>> getExecutorRunPaths(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId);
std::string getExecutorRunPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
std::string getExecutorHttpMarkerPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
std::string getExecutorSentinelPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
std::string getExecutorLatestRunPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId);
std::string getLibprocessPidPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
std::string getForkedPidPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
std::string getContainerRootfsPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
Try<std::list<std::string>> getTaskPaths(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId);
std::string getTaskPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId,
const TaskID& taskId);
std::string getTaskInfoPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId,
const TaskID& taskId);
std::string getTaskUpdatesPath(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId,
const TaskID& taskId);
std::string getResourcesInfoPath(
const std::string& rootDir);
std::string getPersistentVolumePath(
const std::string& rootDir,
const std::string& role,
const std::string& persistenceId);
std::string getPersistentVolumePath(
const std::string& rootDir,
const Resource& resource);
std::string createExecutorDirectory(
const std::string& rootDir,
const SlaveID& slaveId,
const FrameworkID& frameworkId,
const ExecutorID& executorId,
const ContainerID& containerId,
const Option<std::string>& user = None());
std::string createSlaveDirectory(
const std::string& rootDir,
const SlaveID& slaveId);
} // namespace paths {
} // namespace slave {
} // namespace internal {
} // namespace mesos {
#endif // __SLAVE_PATHS_HPP__