tillrohrmann commented on a change in pull request #14254: URL: https://github.com/apache/flink/pull/14254#discussion_r532588887
########## File path: docs/deployment/ha/zookeeper_ha.md ########## @@ -23,113 +23,104 @@ specific language governing permissions and limitations under the License. --> -## ZooKeeper HA Services +Flink's ZooKeeper HA services use [ZooKeeper](http://zookeeper.apache.org) for high availability services. -One high availability services implementation uses ZooKeeper. +* Toc +{:toc} -### Configuration +Flink leverages **[ZooKeeper](http://zookeeper.apache.org)** for *distributed coordination* between all running JobManager instances. +ZooKeeper is a separate service from Flink, which provides highly reliable distributed coordination via leader election and light-weight consistent state storage. +Check out [ZooKeeper's Getting Started Guide](http://zookeeper.apache.org/doc/current/zookeeperStarted.html) for more information about ZooKeeper. +Flink includes scripts to [bootstrap a simple ZooKeeper](#bootstrap-zookeeper) installation. -To enable JobManager High Availability you have to set the **high-availability mode** to *zookeeper*, configure a **ZooKeeper quorum** and set up a **masters file** with all JobManagers hosts and their web UI ports. +## Configuration -Flink leverages **[ZooKeeper](http://zookeeper.apache.org)** for *distributed coordination* between all running JobManager instances. ZooKeeper is a separate service from Flink, which provides highly reliable distributed coordination via leader election and light-weight consistent state storage. Check out [ZooKeeper's Getting Started Guide](http://zookeeper.apache.org/doc/current/zookeeperStarted.html) for more information about ZooKeeper. Flink includes scripts to [bootstrap a simple ZooKeeper](#bootstrap-zookeeper) installation. +In order to start an HA-cluster you have to configure the following configuration keys: -#### Masters File (masters) - -In order to start an HA-cluster configure the *masters* file in `conf/masters`: - -- **masters file**: The *masters file* contains all hosts, on which JobManagers are started, and the ports to which the web user interface binds. - - <pre> -jobManagerAddress1:webUIPort1 -[...] -jobManagerAddressX:webUIPortX - </pre> - -By default, the job manager will pick a *random port* for inter process communication. You can change this via the **`high-availability.jobmanager.port`** key. This key accepts single ports (e.g. `50010`), ranges (`50000-50025`), or a combination of both (`50010,50011,50020-50025,50050-50075`). - -#### Config File (flink-conf.yaml) - -In order to start an HA-cluster add the following configuration keys to `conf/flink-conf.yaml`: - -- **high-availability mode** (required): The *high-availability mode* has to be set in `conf/flink-conf.yaml` to *zookeeper* in order to enable high availability mode. -Alternatively this option can be set to FQN of factory class Flink should use to create HighAvailabilityServices instance. +- **high-availability mode** (required): Review comment: Yes, this is a good idea. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
