4 Flink On Yarn模式
4.1 原理
4.1.1 为什么使用Flink On Yarn?
在实际开发中，使用Flink时，更多的使用方式是Flink On Yarn模式，原因如下：
-1.Yarn的资源可以按需使用，提高集群的资源利用率
-2.Yarn的任务有优先级，根据优先级运行作业
-3.基于Yarn调度系统，能够自动化地处理各个角色的 Failover(容错)
○ JobManager 进程和 TaskManager 进程都由 Yarn NodeManager 监控
○ 如果 JobManager 进程异常退出，则 Yarn ResourceManager 会重新调度 JobManager
到其他机器
○ 如果 TaskManager 进程异常退出，JobManager 会收到消息并重新向 Yarn
ResourceManager 申请资源，重新启动 TaskManager
4.1.2 Flink如何和Yarn进行交互?
1.Client上传jar包和配置文件到HDFS集群上
2.Client向Yarn ResourceManager提交任务并申请资源
3.ResourceManager分配Container资源并启动ApplicationMaster,然后AppMaster加载Flink的Jar
包和配置构建环境,启动JobManager
JobManager和ApplicationMaster运行在同一个container上。
一旦他们被成功启动，AppMaster就知道JobManager的地址(AM它自己所在的机器)。
它就会为TaskManager生成一个新的Flink配置文件(他们就可以连接到JobManager)。
这个配置文件也被上传到HDFS上。
此外，AppMaster容器也提供了Flink的web服务接口。
YARN所分配的所有端口都是临时端口，这允许用户并行执行多个Flink
4.ApplicationMaster向ResourceManager申请工作资源,NodeManager加载Flink的Jar包和配置构
建环境并启动TaskManager
5.TaskManager启动后向JobManager发送心跳包，并等待JobManager向其分配任务
4.1.3 两种方式
4.1.3.1 Session模式
特点：需要事先申请资源，启动JobManager和TaskManger
优点：不需要每次递交作业申请资源，而是使用已经申请好的资源，从而提高执行效率
缺点：作业执行完成以后，资源不会被释放，因此一直会占用系统资源
应用场景：适合作业递交比较频繁的场景，小作业比较多的场景
4.1.3.2 Per-Job模式
特点：每次递交作业都需要申请一次资源
优点：作业运行完成，资源会立刻被释放，不会一直占用系统资源
缺点：每次递交作业都需要申请资源，会影响执行效率，因为申请资源需要消耗时间
应用场景：适合作业比较少的场景、大作业的场景
4.2 操作
1.关闭yarn的内存检查
vim /export/server/hadoop/etc/hadoop/yarn-site.xml
添加：
<!-- 关闭yarn内存检查 --> <property> <name>yarn.nodemanager.pmem-check-enabled</name> <value>false</value> </property> <property> <name>yarn.nodemanager.vmem-check-enabled</name> <value>false</value> </property>
说明:
是否启动一个线程检查每个任务正使用的虚拟内存量，如果任务超出分配值，则直接将其杀
掉，默认是true。
在这里面我们需要关闭，因为对于flink使用yarn模式下，很容易内存超标，这个时候yarn会自
动杀掉job
2.同步
scp -r /export/server/hadoop/etc/hadoop/yarn-site.xml node2:/export/server/hadoop/etc/hadoop/yarn-site.xml scp -r /export/server/hadoop/etc/hadoop/yarn-site.xml node3:/export/server/hadoop/etc/hadoop/yarn-site.xml
3.重启yarn
/export/server/hadoop/sbin/stop-yarn.sh /export/server/hadoop/sbin/start-yarn.sh
4.3 测试
4.3.1 Session模式
yarn-session.sh(开辟资源) + flink run(提交任务)
1.在yarn上启动一个Flink会话，node1上执行以下命令
/export/server/flink/bin/yarn-session.sh -n 2 -tm 800 -s 1 -d
说明:
申请2个CPU、1600M内存
# -n 表示申请2个容器，这里指的就是多少个taskmanager # -tm 表示每个TaskManager的内存大小 # -s 表示每个TaskManager的slots数量 # -d 表示以后台程序方式运行
注意:
该警告不用管
WARN org.apache.hadoop.hdfs.DFSClient - Caught exception
java.lang.InterruptedException
2.查看UI界面
3.使用flink run提交任务：
/export/server/flink/bin/flink run /export/server/flink/examples/batch/WordCount.jar
运行完之后可以继续运行其他的小任务
/export/server/flink/bin/flink run /export/server/flink/examples/batch/WordCount.jar
4.通过上方的ApplicationMaster可以进入Flink的管理界面
5.关闭yarn-session：
yarn application -kill application_1599402747874_0001
rm -rf /tmp/.yarn-properties-root
4.3.2 Per-Job分离模式
1.直接提交job
/export/server/flink/bin/flink run -m yarn-cluster -yjm 1024 -ytm 1024 /export/server/flink/examples/batch/WordCount.jar # -m jobmanager的地址 # -yjm 1024 指定jobmanager的内存信息 # -ytm 1024 指定taskmanager的内存信息
2.查看UI界面
http://node1:8088/cluster
3.注意：
在之前版本中如果使用的是flink on yarn方式，想切换回standalone模式的话，如果报错需要删
除：【/tmp/.yarn-properties-root】
rm -rf /tmp/.yarn-properties-root
因为默认查找当前yarn集群中已有的yarn-session信息中的jobmanager
4.4 参数总结
[root@node1 bin]# /export/server/flink/bin/flink --help ./flink <ACTION> [OPTIONS] [ARGUMENTS] The following actions are available: Action "run" compiles and runs a program. Syntax: run [OPTIONS] <jar-file> <arguments> "run" action options: -c,--class <classname> Class with the program entry point ("main()" method). Only needed if the JAR file does not specify the class in its manifest. -C,--classpath <url> Adds a URL to each user code classloader on all nodes in the cluster. The paths must specify a protocol (e.g. file://) and be accessible on all nodes (e.g. by means of a NFS share). You can use this option multiple times for specifying more than one URL. The protocol must be supported by the {@link java.net.URLClassLoader}. -d,--detached If present, runs the job in detached mode -n,--allowNonRestoredState Allow to skip savepoint state that cannot be restored. You need to allow this if you removed an operator from your program that was part of the program when the savepoint was triggered. -p,--parallelism <parallelism> The parallelism with which to run the program. Optional flag to override the default value specified in the configuration. -py,--python <pythonFile> Python script with the program entry point. The dependent resources can be configured with the `--pyFiles` option. -pyarch,--pyArchives <arg> Add python archive files for job. The archive files will be extracted to the working directory of python UDF worker. Currently only zip-format is supported. For each archive file, a target directory be specified. If the target directory name is specified, the archive file will be extracted to a name can directory with the specified name. Otherwise, the archive file will be extracted to a directory with the same name of the archive file. The files uploaded via this option are accessible via relative path. '#' could be used as the separator of the archive file path and the target directory name. Comma (',') could be used as the separator to specify multiple archive files. This option can be used to upload the virtual environment, the data files used in Python UDF (e.g.: --pyArchives file:///tmp/py37.zip,file:///tmp/data. zip#data --pyExecutable py37.zip/py37/bin/python). The data files could be accessed in Python UDF, e.g.: f = open('data/data.txt', 'r'). -pyexec,--pyExecutable <arg> Specify the path of the python interpreter used to execute the python UDF worker (e.g.: --pyExecutable /usr/local/bin/python3). The python UDF worker depends on Python 3.5+, Apache Beam (version == 2.23.0), Pip (version >= 7.1.0) and SetupTools (version >= 37.0.0). Please ensure that the specified environment meets the above requirements. -pyfs,--pyFiles <pythonFiles> Attach custom python files for job. These files will be added to the PYTHONPATH of both the local client and the remote python UDF worker. The standard python resource file suffixes such as .py/.egg/.zip or directory are all supported. Comma (',') could be used as the separator to specify multiple files (e.g.: --pyFiles file:///tmp/myresource.zip,hdfs:///$na menode_address/myresource2.zip). -pym,--pyModule <pythonModule> Python module with the program entry point. This option must be used in conjunction with `--pyFiles`. -pyreq,--pyRequirements <arg> Specify a requirements.txt file which defines the third-party dependencies. These dependencies will be installed and added to the PYTHONPATH of the python UDF worker. A directory which contains the installation packages of these dependencies could be specified optionally. Use '#' as the separator if the optional parameter exists (e.g.: --pyRequirements file:///tmp/requirements.txt#file:///t mp/cached_dir). -s,--fromSavepoint <savepointPath> Path to a savepoint to restore the job from (for example hdfs:///flink/savepoint-1537). -sae,--shutdownOnAttachedExit If the job is submitted in attached mode, perform a best-effort cluster shutdown when the CLI is terminated abruptly, e.g., in response to a user interrupt, such as typing Ctrl + C. Options for Generic CLI mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink-docs-stabl e/ops/config.html -e,--executor <arg> DEPRECATED: Please use the -t option instead which is also available with the "Application Mode". The name of the executor to be used for executing the given job, which is equivalent to the "execution.target" config option. The currently available executors are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". -t,--target <arg> The deployment target for the given application, which is equivalent to the "execution.target" config option. For the "run" action the currently available targets are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". For the "run-application" action the currently available targets are: "kubernetes-application", "yarn-application". Options for yarn-cluster mode: -d,--detached If present, runs the job in detached mode -m,--jobmanager <arg> Set to yarn-cluster to use YARN execution mode. -yat,--yarnapplicationType <arg> Set a custom application type for the application on YARN -yD <property=value> use value for given property -yd,--yarndetached If present, runs the job in detached mode (deprecated; use non-YARN specific option instead) -yh,--yarnhelp Help for the Yarn session CLI. -yid,--yarnapplicationId <arg> Attach to running YARN session -yj,--yarnjar <arg> Path to Flink jar file -yjm,--yarnjobManagerMemory <arg> Memory for JobManager Container with optional unit (default: MB) -ynl,--yarnnodeLabel <arg> Specify YARN node label for the YARN application -ynm,--yarnname <arg> Set a custom name for the application on YARN -yq,--yarnquery Display available YARN resources (memory, cores) -yqu,--yarnqueue <arg> Specify YARN queue. -ys,--yarnslots <arg> Number of slots per TaskManager -yt,--yarnship <arg> Ship files in the specified directory (t for transfer) -ytm,--yarntaskManagerMemory <arg> Memory per TaskManager Container with optional unit (default: MB) -yz,--yarnzookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Options for default mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink- docs-stable/ops/config.html -m,--jobmanager <arg> Address of the JobManager to which to connect. Use this flag to connect to a different JobManager than the one specified in the configuration. Attention: This option is respected only if the high-availability configuration is NONE. -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Action "run-application" runs an application in Application Mode. Syntax: run-application [OPTIONS] <jar-file> <arguments> Options for Generic CLI mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink-docs-stabl e/ops/config.html -e,--executor <arg> DEPRECATED: Please use the -t option instead which is also available with the "Application Mode". The name of the executor to be used for executing the given job, which is equivalent to the "execution.target" config option. The currently available executors are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". -t,--target <arg> The deployment target for the given application, which is equivalent to the "execution.target" config option. For the "run" action the currently available targets are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". For the "run-application" action the currently available targets are: "kubernetes-application", "yarn-application". Action "info" shows the optimized execution plan of the program (JSON). Syntax: info [OPTIONS] <jar-file> <arguments> "info" action options: -c,--class <classname> Class with the program entry point ("main()" method). Only needed if the JAR file does not specify the class in its manifest. -p,--parallelism <parallelism> The parallelism with which to run the program. Optional flag to override the default value specified in the configuration. Action "list" lists running and scheduled programs. Syntax: list [OPTIONS] "list" action options: -a,--all Show all programs and their JobIDs -r,--running Show only running programs and their JobIDs -s,--scheduled Show only scheduled programs and their JobIDs Options for Generic CLI mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink-docs-stabl e/ops/config.html -e,--executor <arg> DEPRECATED: Please use the -t option instead which is also available with the "Application Mode". The name of the executor to be used for executing the given job, which is equivalent to the "execution.target" config option. The currently available executors are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". -t,--target <arg> The deployment target for the given application, which is equivalent to the "execution.target" config option. For the "run" action the currently available targets are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". For the "run-application" action the currently available targets are: "kubernetes-application", "yarn-application". Options for yarn-cluster mode: -m,--jobmanager <arg> Set to yarn-cluster to use YARN execution mode. -yid,--yarnapplicationId <arg> Attach to running YARN session -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Options for default mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink- docs-stable/ops/config.html -m,--jobmanager <arg> Address of the JobManager to which to connect. Use this flag to connect to a different JobManager than the one specified in the configuration. Attention: This option is respected only if the high-availability configuration is NONE. -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Action "stop" stops a running program with a savepoint (streaming jobs only). Syntax: stop [OPTIONS] <Job ID> "stop" action options: -d,--drain Send MAX_WATERMARK before taking the savepoint and stopping the pipelne. -p,--savepointPath <savepointPath> Path to the savepoint (for example hdfs:///flink/savepoint-1537). If no directory is specified, the configured default will be used ("state.savepoints.dir"). Options for Generic CLI mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink-docs-stabl e/ops/config.html -e,--executor <arg> DEPRECATED: Please use the -t option instead which is also available with the "Application Mode". The name of the executor to be used for executing the given job, which is equivalent to the "execution.target" config option. The currently available executors are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". -t,--target <arg> The deployment target for the given application, which is equivalent to the "execution.target" config option. For the "run" action the currently available targets are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". For the "run-application" action the currently available targets are: "kubernetes-application", "yarn-application". Options for yarn-cluster mode: -m,--jobmanager <arg> Set to yarn-cluster to use YARN execution mode. -yid,--yarnapplicationId <arg> Attach to running YARN session -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Options for default mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink- docs-stable/ops/config.html -m,--jobmanager <arg> Address of the JobManager to which to connect. Use this flag to connect to a different JobManager than the one specified in the configuration. Attention: This option is respected only if the high-availability configuration is NONE. -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Action "cancel" cancels a running program. Syntax: cancel [OPTIONS] <Job ID> "cancel" action options: -s,--withSavepoint <targetDirectory> **DEPRECATION WARNING**: Cancelling a job with savepoint is deprecated. Use "stop" instead. Trigger savepoint and cancel job. The target directory is optional. If no directory is specified, the configured default directory (state.savepoints.dir) is used. Options for Generic CLI mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink-docs-stabl e/ops/config.html -e,--executor <arg> DEPRECATED: Please use the -t option instead which is also available with the "Application Mode". The name of the executor to be used for executing the given job, which is equivalent to the "execution.target" config option. The currently available executors are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". -t,--target <arg> The deployment target for the given application, which is equivalent to the "execution.target" config option. For the "run" action the currently available targets are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". For the "run-application" action the currently available targets are: "kubernetes-application", "yarn-application". Options for yarn-cluster mode: -m,--jobmanager <arg> Set to yarn-cluster to use YARN execution mode. -yid,--yarnapplicationId <arg> Attach to running YARN session -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Options for default mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink- docs-stable/ops/config.html -m,--jobmanager <arg> Address of the JobManager to which to connect. Use this flag to connect to a different JobManager than the one specified in the configuration. Attention: This option is respected only if the high-availability configuration is NONE. -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Action "savepoint" triggers savepoints for a running job or disposes existing ones. Syntax: savepoint [OPTIONS] <Job ID> [<target directory>] "savepoint" action options: -d,--dispose <arg> Path of savepoint to dispose. -j,--jarfile <jarfile> Flink program JAR file. Options for Generic CLI mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink-docs-stabl e/ops/config.html -e,--executor <arg> DEPRECATED: Please use the -t option instead which is also available with the "Application Mode". The name of the executor to be used for executing the given job, which is equivalent to the "execution.target" config option. The currently available executors are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". -t,--target <arg> The deployment target for the given application, which is equivalent to the "execution.target" config option. For the "run" action the currently available targets are: "remote", "local", "kubernetes-session", "yarn-per-job", "yarn-session". For the "run-application" action the currently available targets are: "kubernetes-application", "yarn-application". Options for yarn-cluster mode: -m,--jobmanager <arg> Set to yarn-cluster to use YARN execution mode. -yid,--yarnapplicationId <arg> Attach to running YARN session -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode Options for default mode: -D <property=value> Allows specifying multiple generic configuration options. The available options can be found at https://ci.apache.org/projects/flink/flink- docs-stable/ops/config.html -m,--jobmanager <arg> Address of the JobManager to which to connect. Use this flag to connect to a different JobManager than the one specified in the configuration. Attention: This option is respected only if the high-availability configuration is NONE. -z,--zookeeperNamespace <arg> Namespace to create the Zookeeper sub-paths for high availability mode
