[FLINK-18307][scripts] Rename 'slaves' file to 'workers'

docs/ops/deployment/cluster_setup.md

@@ -72,7 +72,7 @@ Set the `jobmanager.rpc.address` key to point to your master node. You should al
 
 These values are given in MB. If some worker nodes have more main memory which you want to allocate to the Flink system you can overwrite the default value by setting `taskmanager.memory.process.size` or `taskmanager.memory.flink.size` in *conf/flink-conf.yaml* on those specific nodes.
 
-Finally, you must provide a list of all nodes in your cluster which shall be used as worker nodes. Therefore, similar to the HDFS configuration, edit the file *conf/slaves* and enter the IP/host name of each worker node. Each worker node will later run a TaskManager.
+Finally, you must provide a list of all nodes in your cluster which shall be used as worker nodes. Therefore, similar to the HDFS configuration, edit the file *conf/workers* and enter the IP/host name of each worker node. Each worker node will later run a TaskManager.
 
 The following example illustrates the setup with three nodes (with IP addresses from _10.0.0.1_
 to _10.0.0.3_ and hostnames _master_, _worker1_, _worker2_) and shows the contents of the
@@ -91,7 +91,7 @@ configuration files (which need to be accessible at the same path on all machine
   </div>
 <div class="row" style="margin-top: 1em;">
   <p class="lead text-center">
-    /path/to/<strong>flink/<br>conf/slaves</strong>
+    /path/to/<strong>flink/<br>conf/workers</strong>
   <pre>
 10.0.0.2
 10.0.0.3</pre>
@@ -118,7 +118,7 @@ are very important configuration values.
 
 ### Starting Flink
 
-The following script starts a JobManager on the local node and connects via SSH to all worker nodes listed in the *slaves* file to start the TaskManager on each node. Now your Flink system is up and running. The JobManager running on the local node will now accept jobs at the configured RPC port.
+The following script starts a JobManager on the local node and connects via SSH to all worker nodes listed in the *workers* file to start the TaskManager on each node. Now your Flink system is up and running. The JobManager running on the local node will now accept jobs at the configured RPC port.
 
 Assuming that you are on the master node and inside the Flink directory:
 

docs/ops/deployment/cluster_setup.zh.md

@@ -72,7 +72,7 @@ Set the `jobmanager.rpc.address` key to point to your master node. You should al
 
 These values are given in MB. If some worker nodes have more main memory which you want to allocate to the Flink system you can overwrite the default value by setting setting `taskmanager.memory.process.size` or `taskmanager.memory.flink.size` in *conf/flink-conf.yaml* on those specific nodes.
 
-Finally, you must provide a list of all nodes in your cluster which shall be used as worker nodes. Therefore, similar to the HDFS configuration, edit the file *conf/slaves* and enter the IP/host name of each worker node. Each worker node will later run a TaskManager.
+Finally, you must provide a list of all nodes in your cluster which shall be used as worker nodes. Therefore, similar to the HDFS configuration, edit the file *conf/workers* and enter the IP/host name of each worker node. Each worker node will later run a TaskManager.
 
 The following example illustrates the setup with three nodes (with IP addresses from _10.0.0.1_
 to _10.0.0.3_ and hostnames _master_, _worker1_, _worker2_) and shows the contents of the
@@ -91,7 +91,7 @@ configuration files (which need to be accessible at the same path on all machine
   </div>
 <div class="row" style="margin-top: 1em;">
   <p class="lead text-center">
-    /path/to/<strong>flink/<br>conf/slaves</strong>
+    /path/to/<strong>flink/<br>conf/workers</strong>
   <pre>
 10.0.0.2
 10.0.0.3</pre>
@@ -118,7 +118,7 @@ are very important configuration values.
 
 ### Starting Flink
 
-The following script starts a JobManager on the local node and connects via SSH to all worker nodes listed in the *slaves* file to start the TaskManager on each node. Now your Flink system is up and running. The JobManager running on the local node will now accept jobs at the configured RPC port.
+The following script starts a JobManager on the local node and connects via SSH to all worker nodes listed in the *workers* file to start the TaskManager on each node. Now your Flink system is up and running. The JobManager running on the local node will now accept jobs at the configured RPC port.
 
 Assuming that you are on the master node and inside the Flink directory:
 

flink-dist/src/main/flink-bin/bin/config.sh

@@ -378,14 +378,14 @@ fi
 # also potentially includes topology information and the taskManager type
 extractHostName() {
     # handle comments: extract first part of string (before first # character)
-    SLAVE=`echo $1 | cut -d'#' -f 1`
+    WORKER=`echo $1 | cut -d'#' -f 1`
 
     # Extract the hostname from the network hierarchy
-    if [[ "$SLAVE" =~ ^.*/([0-9a-zA-Z.-]+)$ ]]; then
-            SLAVE=${BASH_REMATCH[1]}
+    if [[ "$WORKER" =~ ^.*/([0-9a-zA-Z.-]+)$ ]]; then
+            WORKER=${BASH_REMATCH[1]}
     fi
 
-    echo $SLAVE
+    echo $WORKER
 }
 
 # Auxilliary functions for log file rotation
@@ -446,52 +446,52 @@ readMasters() {
     done < "$MASTERS_FILE"
 }
 
-readSlaves() {
-    SLAVES_FILE="${FLINK_CONF_DIR}/slaves"
+readWorkers() {
+    WORKERS_FILE="${FLINK_CONF_DIR}/workers"
 
-    if [[ ! -f "$SLAVES_FILE" ]]; then
-        echo "No slaves file. Please specify slaves in 'conf/slaves'."
+    if [[ ! -f "$WORKERS_FILE" ]]; then
+        echo "No workers file. Please specify workers in 'conf/workers'."
         exit 1
     fi
 
-    SLAVES=()
+    WORKERS=()
 
-    SLAVES_ALL_LOCALHOST=true
+    WORKERS_ALL_LOCALHOST=true
     GOON=true
     while $GOON; do
         read line || GOON=false
         HOST=$( extractHostName $line)
         if [ -n "$HOST" ] ; then
-            SLAVES+=(${HOST})
+            WORKERS+=(${HOST})
             if [ "${HOST}" != "localhost" ] && [ "${HOST}" != "127.0.0.1" ] ; then
-                SLAVES_ALL_LOCALHOST=false
+                WORKERS_ALL_LOCALHOST=false
             fi
         fi
-    done < "$SLAVES_FILE"
+    done < "$WORKERS_FILE"
 }
 
-# starts or stops TMs on all slaves
-# TMSlaves start|stop
-TMSlaves() {
+# starts or stops TMs on all workers
+# TMWorkers start|stop
+TMWorkers() {
     CMD=$1
 
-    readSlaves
+    readWorkers
 
-    if [ ${SLAVES_ALL_LOCALHOST} = true ] ; then
+    if [ ${WORKERS_ALL_LOCALHOST} = true ] ; then
         # all-local setup
-        for slave in ${SLAVES[@]}; do
+        for worker in ${WORKERS[@]}; do
             "${FLINK_BIN_DIR}"/taskmanager.sh "${CMD}"
         done
     else
         # non-local setup
-        # Stop TaskManager instance(s) using pdsh (Parallel Distributed Shell) when available
+        # start/stop TaskManager instance(s) using pdsh (Parallel Distributed Shell) when available
         command -v pdsh >/dev/null 2>&1
         if [[ $? -ne 0 ]]; then
-            for slave in ${SLAVES[@]}; do
-                ssh -n $FLINK_SSH_OPTS $slave -- "nohup /bin/bash -l \"${FLINK_BIN_DIR}/taskmanager.sh\" \"${CMD}\" &"
+            for worker in ${WORKERS[@]}; do
+                ssh -n $FLINK_SSH_OPTS $worker -- "nohup /bin/bash -l \"${FLINK_BIN_DIR}/taskmanager.sh\" \"${CMD}\" &"
             done
         else
-            PDSH_SSH_ARGS="" PDSH_SSH_ARGS_APPEND=$FLINK_SSH_OPTS pdsh -w $(IFS=, ; echo "${SLAVES[*]}") \
+            PDSH_SSH_ARGS="" PDSH_SSH_ARGS_APPEND=$FLINK_SSH_OPTS pdsh -w $(IFS=, ; echo "${WORKERS[*]}") \
                 "nohup /bin/bash -l \"${FLINK_BIN_DIR}/taskmanager.sh\" \"${CMD}\""
         fi
     fi

flink-dist/src/main/flink-bin/bin/start-cluster.sh

@@ -50,4 +50,4 @@ fi
 shopt -u nocasematch
 
 # Start TaskManager instance(s)
-TMSlaves start
+TMWorkers start

flink-dist/src/main/flink-bin/bin/stop-cluster.sh

@@ -23,7 +23,7 @@ bin=`cd "$bin"; pwd`
 . "$bin"/config.sh
 
 # Stop TaskManager instance(s)
-TMSlaves stop
+TMWorkers stop
 
 # Stop JobManager instance(s)
 shopt -s nocasematch

flink-end-to-end-tests/flink-end-to-end-tests-common/src/main/java/org/apache/flink/tests/util/flink/FlinkDistribution.java

@@ -268,7 +268,7 @@ public void appendConfiguration(Configuration config) throws IOException {
 	}
 
 	public void setTaskExecutorHosts(Collection<String> taskExecutorHosts) throws IOException {
-		Files.write(conf.resolve("slaves"), taskExecutorHosts);
+		Files.write(conf.resolve("workers"), taskExecutorHosts);
 	}
 
 	public Stream<String> searchAllLogs(Pattern pattern, Function<Matcher, String> matchProcessor) throws IOException {

pom.xml

@@ -1476,7 +1476,7 @@ under the License.
 						<!-- netty test file, still Apache License 2.0 but with a different header -->
 						<exclude>flink-runtime/src/test/java/org/apache/flink/runtime/io/network/buffer/AbstractByteBufTest.java</exclude>
 						<!-- Configuration Files. -->
-						<exclude>**/flink-bin/conf/slaves</exclude>
+						<exclude>**/flink-bin/conf/workers</exclude>
 						<exclude>**/flink-bin/conf/masters</exclude>
 						<!-- Administrative files in the main trunk. -->
 						<exclude>**/README.md</exclude>