Github user d2r commented on a diff in the pull request:
https://github.com/apache/storm/pull/1642#discussion_r76476827
--- Diff:
storm-core/src/jvm/org/apache/storm/daemon/supervisor/Container.java ---
@@ -0,0 +1,417 @@
+/**
+ * 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.
+ */
+package org.apache.storm.daemon.supervisor;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.lang.ProcessBuilder.Redirect;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.storm.Config;
+import org.apache.storm.container.ResourceIsolationInterface;
+import org.apache.storm.generated.LSWorkerHeartbeat;
+import org.apache.storm.generated.LocalAssignment;
+import org.apache.storm.generated.ProfileRequest;
+import org.apache.storm.utils.AdvancedFSOps;
+import org.apache.storm.utils.ConfigUtils;
+import org.apache.storm.utils.LocalState;
+import org.apache.storm.utils.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yaml.snakeyaml.Yaml;
+
+/**
+ * Represents a container that a worker will run in.
+ */
+public abstract class Container {
+ private static final Logger LOG =
LoggerFactory.getLogger(BasicContainer.class);
+ protected final Map<String, Object> _conf;
+ protected String _workerId;
+ protected final String _supervisorId;
+ protected final int _port;
+ protected final LocalAssignment _assignment;
+ protected final AdvancedFSOps _ops;
+ protected final ResourceIsolationInterface _resourceIsolationManager;
+
+ protected Container(int port, LocalAssignment assignment, Map<String,
Object> conf,
+ String supervisorId, ResourceIsolationInterface
resourceIsolationManager) {
+ _port = port;
+ _assignment = assignment;
+ _conf = conf;
+ _supervisorId = supervisorId;
+ _resourceIsolationManager = resourceIsolationManager;
+ _ops = AdvancedFSOps.mk(conf);
+ }
+
+ /**
+ * Kill a given process
+ * @param pid the id of the process to kill
+ * @throws IOException
+ */
+ protected void kill(long pid) throws IOException {
+ Utils.killProcessWithSigTerm(String.valueOf(pid));
+ }
+
+ /**
+ * Kill a given process
+ * @param pid the id of the process to kill
+ * @throws IOException
+ */
+ protected void forceKill(long pid) throws IOException {
+ Utils.forceKillProcess(String.valueOf(pid));
+ }
+
+ /**
+ * Kill the processes in this container nicely.
+ * kill -15 equivalent
+ * @throws IOException on any error
+ */
+ public void kill() throws IOException {
+ LOG.info("Killing {}:{}", _supervisorId, _workerId);
+ Set<Long> pids = getAllPids();
+
+ for (Long pid : pids) {
+ kill(pid);
+ }
+ }
+
+ /**
+ * Kill the processes in this container violently.
+ * kill -9 equivalent
+ * @throws IOException on any error
+ */
+ public void forceKill() throws IOException {
+ LOG.info("Force Killing {}:{}", _supervisorId, _workerId);
+ Set<Long> pids = getAllPids();
+
+ for (Long pid : pids) {
+ forceKill(pid);
+ }
+ }
+
+ /**
+ * Read the Heartbeat for the current container.
+ * @return the Heartbeat
+ * @throws IOException on any error
+ */
+ public LSWorkerHeartbeat readHeartbeat() throws IOException {
+ LocalState localState = ConfigUtils.workerState(_conf, _workerId);
+ LSWorkerHeartbeat hb = localState.getWorkerHeartBeat();
+ LOG.warn("{}: Reading heartbeat {}", _workerId, hb);
+ return hb;
+ }
+
+ /**
+ * Is a process alive and running?
+ * @param pid the PID of the running process
+ * @param user the user that is expected to own that process
+ * @return true if it is, else false
+ * @throws IOException on any error
+ */
+ protected boolean isProcessAlive(long pid, String user) throws
IOException {
+ if (Utils.IS_ON_WINDOWS) {
+ ProcessBuilder pb = new ProcessBuilder("tasklist", "/nh",
"/fi", "pid eq"+pid);
+ pb.redirectError(Redirect.INHERIT);
+ Process p = pb.start();
+ try (BufferedReader in = new BufferedReader(new
InputStreamReader(p.getInputStream()))) {
+ //TODO would be really nice to parse out the user
+ if (in.readLine() != null) {
+ return true;
+ }
+ }
+ return false;
+ }
+ //Not on Windows assume POSIX
+ ProcessBuilder pb = new ProcessBuilder("ps", "-o", "user", "-p",
String.valueOf(pid));
+ pb.redirectError(Redirect.INHERIT);
+ Process p = pb.start();
+ try (BufferedReader in = new BufferedReader(new
InputStreamReader(p.getInputStream()))) {
+ String first = in.readLine();
+ assert("USER".equals(first));
+ String processUser;
+ while ((processUser = in.readLine()) != null) {
+ if (user.equals(processUser)) {
+ return true;
+ } else {
+ LOG.info("Found {} running as {}, but expected it to
be {}", pid, processUser, user);
+ }
+ }
+ }
+ return false;
+ }
+
+ /**
+ * @return true if all of the processes are dead, else false
+ * @throws IOException on any error
+ */
+ public boolean areAllProcessesDead() throws IOException {
+ Set<Long> pids = getAllPids();
+ String user = getWorkerUser();
+
+ boolean allDead = true;
+ for (Long pid: pids) {
+ if (!isProcessAlive(pid, user)) {
+ LOG.warn("{}: PID {} is dead", _workerId, pid);
+ } else {
+ allDead = false;
+ break;
+ }
+ }
+ return allDead;
+ }
+
+ /**
+ * Clean up the container. It is not coming back.
+ * by default do the same thing as when restarting.
+ * @throws IOException on any error
+ */
+ public void cleanUp() throws IOException {
+ cleanUpForRestart();
+ }
+
+ /**
+ * Setup the container to run. By default this creates the needed
directories/links in the
+ * local file system
+ * PREREQUISITE: All needed blobs and topology, jars/configs have been
downloaded and
+ * placed in the appropriate locations
+ * @throws IOException on any error
+ */
+ public void setup() throws IOException {
+ final String topologyId = _assignment.get_topology_id();
+ if (!SupervisorUtils.doRequiredTopoFilesExist(_conf, topologyId)) {
+ LOG.info("Missing topology storm code, so can't launch worker
with assignment {} for this supervisor {} on port {} with id {}", _assignment,
+ _supervisorId, _port, _workerId);
+ throw new IllegalStateException("Not all needed files are
here!!!!");
+ }
+ String pidsPath = ConfigUtils.workerPidsRoot(_conf, _workerId);
+ String hbPath = ConfigUtils.workerHeartbeatsRoot(_conf, _workerId);
+
+ FileUtils.forceMkdir(new File(pidsPath));
+ FileUtils.forceMkdir(new File(ConfigUtils.workerTmpRoot(_conf,
_workerId)));
+ FileUtils.forceMkdir(new File(hbPath));
+
+ Map<String, Object> topologyConf =
ConfigUtils.readSupervisorStormConf(_conf, topologyId);
+ String user = (String)
topologyConf.get(Config.TOPOLOGY_SUBMITTER_USER);
+ writeLogMetadata(topologyConf, user, topologyId);
+ ConfigUtils.setWorkerUserWSE(_conf, _workerId, user);
+ createArtifactsLink(topologyId);
+
+ createBlobstoreLinks(topologyId);
+ }
+
+ /**
+ * Write out the file used by the log viewer to allow/reject log access
+ * @param topologyConf the config for the topology
+ * @param user the user this is going to run as
+ * @param topologyId the id of the topology
+ * @throws IOException on any error
+ */
+ @SuppressWarnings("unchecked")
+ protected void writeLogMetadata(Map<String, Object> topologyConf,
String user, String topologyId) throws IOException {
+ Map<String, Object> data = new HashMap<>();
+ data.put(Config.TOPOLOGY_SUBMITTER_USER, user);
+ data.put("worker-id", _workerId);
+
+ Set<String> logsGroups = new HashSet<>();
+ //for supervisor-test
+ if (topologyConf.get(Config.LOGS_GROUPS) != null) {
+ List<String> groups = (List<String>)
topologyConf.get(Config.LOGS_GROUPS);
+ for (String group : groups){
+ logsGroups.add(group);
+ }
+ }
+ if (topologyConf.get(Config.TOPOLOGY_GROUPS) != null) {
+ List<String> topGroups = (List<String>)
topologyConf.get(Config.TOPOLOGY_GROUPS);
+ logsGroups.addAll(topGroups);
+ }
+ data.put(Config.LOGS_GROUPS, logsGroups.toArray());
+
+ Set<String> logsUsers = new HashSet<>();
+ if (topologyConf.get(Config.LOGS_USERS) != null) {
+ List<String> logUsers = (List<String>)
topologyConf.get(Config.LOGS_USERS);
+ for (String logUser : logUsers){
+ logsUsers.add(logUser);
+ }
+ }
+ if (topologyConf.get(Config.TOPOLOGY_USERS) != null) {
+ List<String> topUsers = (List<String>)
topologyConf.get(Config.TOPOLOGY_USERS);
+ for (String logUser : topUsers){
+ logsUsers.add(logUser);
+ }
+ }
+ data.put(Config.LOGS_USERS, logsUsers.toArray());
+
+ File file = ConfigUtils.getLogMetaDataFile(_conf, topologyId,
_port);
+ File parent = file.getParentFile();
+ if (!Utils.checkFileExists(parent)) {
+ FileUtils.forceMkdir(file.getParentFile());
+
_ops.setupStormCodeDir(ConfigUtils.readSupervisorStormConf(_conf, topologyId),
file.getParentFile().getCanonicalPath());
+ }
+ Yaml yaml = new Yaml();
+ try (FileWriter writer = new FileWriter(file)) {
+ yaml.dump(data, writer);
+ }
+ }
+
+ /**
+ * Create symlink from the containers directory/artifacts to the
artifacts directory
+ * @param topologyId the id of the topology this is for
+ * @throws IOException on any error
+ */
+ protected void createArtifactsLink(String topologyId) throws
IOException {
+ String workerDir = ConfigUtils.workerRoot(_conf, _workerId);
+ String topoDir = ConfigUtils.workerArtifactsRoot(_conf,
topologyId);
+ if (Utils.checkFileExists(workerDir)) {
+ LOG.debug("Creating symlinks for worker-id: {} topology-id: {}
to its port artifacts directory", _workerId, topologyId);
+ Utils.createSymlink(workerDir, topoDir, "artifacts",
String.valueOf(_port));
+ }
--- End diff --
In `writeLogMetadata` we actually try to set up the directory if we don't
find it first. Then we write the log metadata there. Is this a similar case
when if we find that the dir is not there already we should throw?
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