基于K8s的Leader选举源码剖析

a_conf/a.txt

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+hadoop spark
+flink

a_conf/config.yaml

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+################################################################################
+env.java.opts.all: --add-exports=java.base/sun.net.util=ALL-UNNAMED --add-exports=java.rmi/sun.rmi.registry=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-exports=java.security.jgss/sun.security.krb5=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED --add-opens=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.locks=ALL-UNNAMED
+jobmanager.resource-id: q1
+jobmanager.rpc.address: localhost
+# The RPC port where the JobManager is reachable.
+jobmanager.rpc.port: 6123
+jobmanager.bind-host: localhost
+jobmanager.memory.process.size: 1600m
+taskmanager.bind-host: localhost
+taskmanager.resource-id: q2
+
+#唯一标识 window下必须配置
+taskmanager.cpu.cores: 1
+#任务的堆内存
+taskmanager.memory.task.heap.size: 512m
+#托管内存
+taskmanager.memory.managed.size: 512m
+#网络内存（Network Memory）
+taskmanager.memory.network.min: 128m
+taskmanager.memory.network.max: 128m
+#任务堆外内存
+taskmanager.memory.task.off-heap.size: 0m
+#框架内存
+taskmanager.memory.framework.heap.size: 256m
+#框架堆外内存
+taskmanager.memory.framework.off-heap.size: 128m
+#JVM Metaspace
+taskmanager.memory.jvm-metaspace.size: 128m
+#JVM 开销
+taskmanager.memory.jvm-overhead.min: 128m
+taskmanager.memory.jvm-overhead.max: 128m
+#心跳参数
+#heartbeat.timeout: 50000
+#heartbeat.interval: 10000
+taskmanager.host: localhost
+taskmanager.memory.process.size: 1728m
+taskmanager.numberOfTaskSlots: 2
+# The parallelism used for programs that did not specify and other parallelism.
+parallelism.default: 1
+jobmanager.execution.failover-strategy: region
+rest.address: localhost
+rest.bind-address: localhost

a_conf/log4j-cli.properties

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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.
+################################################################################
+
+# Allows this configuration to be modified at runtime. The file will be checked every 30 seconds.
+monitorInterval=30
+
+rootLogger.level = ${env:ROOT_LOG_LEVEL:-INFO}
+rootLogger.appenderRef.file.ref = FileAppender
+
+# Log all infos in the given file
+appender.file.name = FileAppender
+appender.file.type = FILE
+appender.file.append = false
+appender.file.fileName = ${sys:log.file}
+appender.file.layout.type = PatternLayout
+appender.file.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+
+# Log output from org.apache.flink.yarn to the console. This is used by the
+# CliFrontend class when using a per-job YARN cluster.
+logger.yarn.name = org.apache.flink.yarn
+logger.yarn.level = INFO
+logger.yarn.appenderRef.console.ref = ConsoleAppender
+logger.yarncli.name = org.apache.flink.yarn.cli.FlinkYarnSessionCli
+logger.yarncli.level = INFO
+logger.yarncli.appenderRef.console.ref = ConsoleAppender
+logger.hadoop.name = org.apache.hadoop
+logger.hadoop.level = INFO
+logger.hadoop.appenderRef.console.ref = ConsoleAppender
+
+# Make sure hive logs go to the file.
+logger.hive.name = org.apache.hadoop.hive
+logger.hive.level = INFO
+logger.hive.additivity = false
+logger.hive.appenderRef.file.ref = FileAppender
+
+# Log output from org.apache.flink.kubernetes to the console.
+logger.kubernetes.name = org.apache.flink.kubernetes
+logger.kubernetes.level = INFO
+logger.kubernetes.appenderRef.console.ref = ConsoleAppender
+
+appender.console.name = ConsoleAppender
+appender.console.type = CONSOLE
+appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+
+# suppress the warning that hadoop native libraries are not loaded (irrelevant for the client)
+logger.hadoopnative.name = org.apache.hadoop.util.NativeCodeLoader
+logger.hadoopnative.level = OFF
+
+# Suppress the irrelevant (wrong) warnings from the Netty channel handler
+logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
+logger.netty.level = OFF

a_conf/log4j-console.properties

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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.
+################################################################################
+
+# Allows this configuration to be modified at runtime. The file will be checked every 30 seconds.
+monitorInterval=30
+
+# This affects logging for both user code and Flink
+rootLogger.level = ${env:ROOT_LOG_LEVEL:-INFO}
+rootLogger.appenderRef.console.ref = ConsoleAppender
+rootLogger.appenderRef.rolling.ref = RollingFileAppender
+
+# Uncomment this if you want to _only_ change Flink's logging
+#logger.flink.name = org.apache.flink
+#logger.flink.level = INFO
+
+# The following lines keep the log level of common libraries/connectors on
+# log level INFO. The root logger does not override this. You have to manually
+# change the log levels here.
+logger.pekko.name = org.apache.pekko
+logger.pekko.level = INFO
+logger.kafka.name= org.apache.kafka
+logger.kafka.level = INFO
+logger.hadoop.name = org.apache.hadoop
+logger.hadoop.level = INFO
+logger.zookeeper.name = org.apache.zookeeper
+logger.zookeeper.level = INFO
+logger.shaded_zookeeper.name = org.apache.flink.shaded.zookeeper3
+logger.shaded_zookeeper.level = INFO
+
+# Log all infos to the console
+appender.console.name = ConsoleAppender
+appender.console.type = CONSOLE
+appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+appender.console.filter.threshold.type = ThresholdFilter
+appender.console.filter.threshold.level = ${sys:console.log.level:-ALL}
+
+# Log all infos in the given rolling file
+appender.rolling.name = RollingFileAppender
+appender.rolling.type = RollingFile
+appender.rolling.append = true
+appender.rolling.fileName = ${sys:log.file}
+appender.rolling.filePattern = ${sys:log.file}.%i
+appender.rolling.layout.type = PatternLayout
+appender.rolling.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+appender.rolling.policies.type = Policies
+appender.rolling.policies.size.type = SizeBasedTriggeringPolicy
+appender.rolling.policies.size.size=100MB
+appender.rolling.policies.startup.type = OnStartupTriggeringPolicy
+appender.rolling.strategy.type = DefaultRolloverStrategy
+appender.rolling.strategy.max = ${env:MAX_LOG_FILE_NUMBER:-10}
+
+# Suppress the irrelevant (wrong) warnings from the Netty channel handler
+logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
+logger.netty.level = OFF

a_conf/log4j-session.properties

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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.
+################################################################################
+
+# Allows this configuration to be modified at runtime. The file will be checked every 30 seconds.
+monitorInterval=30
+
+rootLogger.level = ${env:ROOT_LOG_LEVEL:-INFO}
+rootLogger.appenderRef.console.ref = ConsoleAppender
+
+appender.console.name = ConsoleAppender
+appender.console.type = CONSOLE
+appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+
+# Suppress the irrelevant (wrong) warnings from the Netty channel handler
+logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
+logger.netty.level = OFF
+logger.zookeeper.name = org.apache.zookeeper
+logger.zookeeper.level = WARN
+logger.shaded_zookeeper.name = org.apache.flink.shaded.zookeeper3
+logger.shaded_zookeeper.level = WARN
+logger.curator.name = org.apache.flink.shaded.org.apache.curator.framework
+logger.curator.level = WARN
+logger.runtimeutils.name= org.apache.flink.runtime.util.ZooKeeperUtils
+logger.runtimeutils.level = WARN
+logger.runtimeleader.name = org.apache.flink.runtime.leaderretrieval.ZooKeeperLeaderRetrievalDriver
+logger.runtimeleader.level = WARN

a_conf/log4j.properties

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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.
+################################################################################
+
+# Allows this configuration to be modified at runtime. The file will be checked every 30 seconds.
+monitorInterval=30
+
+# This affects logging for both user code and Flink
+rootLogger.level = ${env:ROOT_LOG_LEVEL:-INFO}
+#rootLogger.appenderRef.file.ref = MainAppender
+rootLogger.appenderRef.file.ref = ConsoleAppender
+
+# Uncomment this if you want to _only_ change Flink's logging
+logger.flink.name = org.apache.flink
+logger.flink.level = INFO
+
+# The following lines keep the log level of common libraries/connectors on
+# log level INFO. The root logger does not override this. You have to manually
+# change the log levels here.
+logger.pekko.name = org.apache.pekko
+logger.pekko.level = INFO
+logger.kafka.name= org.apache.kafka
+logger.kafka.level = INFO
+logger.hadoop.name = org.apache.hadoop
+logger.hadoop.level = INFO
+logger.zookeeper.name = org.apache.zookeeper
+logger.zookeeper.level = INFO
+logger.shaded_zookeeper.name = org.apache.flink.shaded.zookeeper3
+logger.shaded_zookeeper.level = INFO
+
+# Log all infos in the given file
+appender.main.name = MainAppender
+appender.main.type = RollingFile
+appender.main.append = true
+appender.main.fileName = ${sys:log.file}
+appender.main.filePattern = ${sys:log.file}.%i
+appender.main.layout.type = PatternLayout
+appender.main.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+appender.main.policies.type = Policies
+appender.main.policies.size.type = SizeBasedTriggeringPolicy
+appender.main.policies.size.size = 100MB
+appender.main.policies.startup.type = OnStartupTriggeringPolicy
+appender.main.strategy.type = DefaultRolloverStrategy
+appender.main.strategy.max = ${env:MAX_LOG_FILE_NUMBER:-10}
+
+# Suppress the irrelevant (wrong) warnings from the Netty channel handler
+logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
+logger.netty.level = OFF
+
+
+# Log all infos to the console
+appender.console.name = ConsoleAppender
+appender.console.type = CONSOLE
+appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+appender.console.filter.threshold.type = ThresholdFilter
+appender.console.filter.threshold.level = ${sys:console.log.level:-ALL}

a_conf/logback-console.xml

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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.
+  -->
+
+<configuration>
+    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{60} %X{sourceThread} - %msg%n</pattern>
+        </encoder>
+        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
+            <level>${console.log.level:-ALL}</level>
+        </filter>
+    </appender>
+
+    <appender name="rolling" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>${log.file}</file>
+        <append>false</append>
+
+        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>${log.file}.%i</fileNamePattern>
+            <minIndex>1</minIndex>
+            <maxIndex>10</maxIndex>
+        </rollingPolicy>
+
+        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>100MB</maxFileSize>
+        </triggeringPolicy>
+
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{60} %X{sourceThread} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <!-- This affects logging for both user code and Flink -->
+    <root level="${ROOT_LOG_LEVEL:-INFO}">
+        <appender-ref ref="console"/>
+        <appender-ref ref="rolling"/>
+    </root>
+
+    <!-- Uncomment this if you want to only change Flink's logging -->
+    <!--<logger name="org.apache.flink" level="INFO"/>-->
+
+    <!-- The following lines keep the log level of common libraries/connectors on
+         log level INFO. The root logger does not override this. You have to manually
+         change the log levels here. -->
+    <logger name="org.apache.pekko" level="INFO"/>
+    <logger name="org.apache.kafka" level="INFO"/>
+    <logger name="org.apache.hadoop" level="INFO"/>
+    <logger name="org.apache.zookeeper" level="INFO"/>
+
+    <!-- Suppress the irrelevant (wrong) warnings from the Netty channel handler -->
+    <logger name="org.jboss.netty.channel.DefaultChannelPipeline" level="ERROR"/>
+</configuration>