805 lines
33 KiB
Markdown
805 lines
33 KiB
Markdown
# 集群方式部署
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Apache Druid 被设计部署为可扩展和容错的集群部署方式。
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在本文档中,我们将会设置一个示例集群,并且进行一些讨论,你可以进行那些修改来满足你的需求。
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这个简单的集群包括有下面的特性:
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- 主服务器(Master Server)将会运行 Coordinator 和 Overlord 进程
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- 2 个可扩展和容错的数据服务器将会运行 Historical 和 MiddleManager 进程
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- 一个查询服务器(Query Server)将会运行 Broker 和 Router 进程
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在生产环境中,我们建议你部署多个 Master 服务器和多个 Query 服务器,服务器的高可用性(fault-tolerant)配置与你的数据特性和容错性要求息息相关。
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但是你可以使用一个主服务器(Master Server) 和 一个查询服务器(Query Server)来启动服务,随着需求的增加你可以随时增加更多的服务器节点。
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## 选择硬件
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### 全新部署
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如果你没有已经存在的 Druid 集群,但是你希望开始在你的环境中使用集群方式部署 Druid,本文档将会使用预配置(pre-made configurations)内容来帮助你开始部署 Druid 的集群。
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#### 主服务器(Master Server)
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Coordinator 和 Overlord 进程将会负责处理 metadata 数据和在你集群中进行协调。这 2 个进程可以合并在同一个服务器上。
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在本示例中,我们将会在 AWS [m5.2xlarge](https://aws.amazon.com/ec2/instance-types/m5/) 部署一个评估的服务器和实例。
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AWS 上面硬件的配置为:
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- 8 vCPUs
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- 31 GB RAM
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有关本服务器的配置信息和有关硬件大小的建议,可以在文件 `conf/druid/cluster/master` 中找到。
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#### 数据服务器(Data server)
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Historicals 和 MiddleManagers 可以合并到同一个服务器上,这个 2 个进程在你的集群中用于处理实际的数据。通常来说越大 CPU, RAM, SSDs硬盘越好。
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在本示例中,我们将会在 [i3.4xlarge](https://aws.amazon.com/ec2/instance-types/i3/) 部署一个评估的服务器和实例。
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AWS 上面硬件的配置为:
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- 16 vCPUs
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- 122 GB RAM
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- 2 * 1.9TB SSD storage
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有关本服务器的配置信息和有关硬件大小的建议,可以在文件 `conf/druid/cluster/data` 中找到。
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#### 查询服务器(Query server)
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Druid Brokers 可以接受查询,并且将接受的查询发送到集群中处理。同时他们也负责维护内存中的查询缓存, 常来说越大的 CPU, RAM 越好。
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在本示例中,我们将会在 [m5.2xlarge](https://aws.amazon.com/ec2/instance-types/m5/) 部署一个评估的服务器和实例。
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AWS 上面硬件的配置为:
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- 8 vCPUs
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- 31 GB RAM
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你也可以考虑在运行 Broker 进程的查询服务器上部署任何开源的 UI 或者查询库。
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有关本服务器的配置信息和有关硬件大小的建议,可以在文件,可以在文件 `conf/druid/cluster/query` 中找到。
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#### 其他硬件大小
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上面的示例集群配置是从多种确定 Druid 集群可能的配置方式中选择的一个示例。
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您可以根据自己的特定需求和要求来选择 较小/较大的硬件配置或 较少/更多的服务器数量。
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如果你的使用实例有比较复杂的可扩展性要求,你也可以选择不将进程合并到服务器上的配置方案,而针对每一个进程配置一台服务器(例如,你可以配置一个独立的 Historical 服务器)。
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有关更多的配置信息,请参考页面 [basic cluster tuning guide](../operations/basic-cluster-tuning.md) 中的内容,能够帮助你如何对你的配置进行配置和扩展。
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### 从独立服务器部署上合并到集群
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如果你已经有一个已经存在并且独立运行的独立服务器部署的话,例如在页面 [single-server deployment examples](../operations/single-server.md) 中部署的服务器,
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现在你希望将这个独立部署的服务器合并到集群的部署方式中的话,下面的这部分内容将会帮助你完成这个切换和合并的过程。
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这个过程包括有如何对硬件进行的选择和针对 Master/Data/Query 服务器应该如何进行组织。
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#### 主服务器(Master Server)
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The main considerations for the Master server are available CPUs and RAM for the Coordinator and Overlord heaps.
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Sum up the allocated heap sizes for your Coordinator and Overlord from the single-server deployment, and choose Master server hardware with enough RAM for the combined heaps, with some extra RAM for other processes on the machine.
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For CPU cores, you can choose hardware with approximately 1/4th of the cores of the single-server deployment.
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#### Data server
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When choosing Data server hardware for the cluster, the main considerations are available CPUs and RAM, and using SSD storage if feasible.
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In a clustered deployment, having multiple Data servers is a good idea for fault-tolerance purposes.
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When choosing the Data server hardware, you can choose a split factor `N`, divide the original CPU/RAM of the single-server deployment by `N`, and deploy `N` Data servers of reduced size in the new cluster.
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Instructions for adjusting the Historical/MiddleManager configs for the split are described in a later section in this guide.
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#### Query server
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The main considerations for the Query server are available CPUs and RAM for the Broker heap + direct memory, and Router heap.
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Sum up the allocated memory sizes for your Broker and Router from the single-server deployment, and choose Query server hardware with enough RAM to cover the Broker/Router, with some extra RAM for other processes on the machine.
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For CPU cores, you can choose hardware with approximately 1/4th of the cores of the single-server deployment.
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The [basic cluster tuning guide](../operations/basic-cluster-tuning.md) has information on how to calculate Broker/Router memory usage.
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## Select OS
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We recommend running your favorite Linux distribution. You will also need:
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* **Java 8 or later**
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> **Warning:** Druid only officially supports Java 8. Any Java version later than 8 is still experimental.
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>
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> If needed, you can specify where to find Java using the environment variables `DRUID_JAVA_HOME` or `JAVA_HOME`. For more details run the verify-java script.
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Your OS package manager should be able to help for both Java. If your Ubuntu-based OS
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does not have a recent enough version of Java, WebUpd8 offers [packages for those
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OSes](http://www.webupd8.org/2012/09/install-oracle-java-8-in-ubuntu-via-ppa.html).
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## Download the distribution
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First, download and unpack the release archive. It's best to do this on a single machine at first,
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since you will be editing the configurations and then copying the modified distribution out to all
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of your servers.
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[Download](https://www.apache.org/dyn/closer.cgi?path=/druid/apache-druid-0.21.1/apache-druid-apache-druid-0.21.1-bin.tar.gz)
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the apache-druid-0.21.1 release.
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Extract Druid by running the following commands in your terminal:
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```bash
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tar -xzf apache-druid-apache-druid-0.21.1-bin.tar.gz
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cd apache-druid-apache-druid-0.21.1
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```
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In the package, you should find:
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* `LICENSE` and `NOTICE` files
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* `bin/*` - scripts related to the [single-machine quickstart](index.html)
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* `conf/druid/cluster/*` - template configurations for a clustered setup
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* `extensions/*` - core Druid extensions
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* `hadoop-dependencies/*` - Druid Hadoop dependencies
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* `lib/*` - libraries and dependencies for core Druid
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* `quickstart/*` - files related to the [single-machine quickstart](index.html)
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We'll be editing the files in `conf/druid/cluster/` in order to get things running.
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### Migrating from Single-Server Deployments
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In the following sections we will be editing the configs under `conf/druid/cluster`.
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If you have an existing single-server deployment, please copy your existing configs to `conf/druid/cluster` to preserve any config changes you have made.
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## Configure metadata storage and deep storage
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### Migrating from Single-Server Deployments
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If you have an existing single-server deployment and you wish to preserve your data across the migration, please follow the instructions at [metadata migration](../operations/metadata-migration.md) and [deep storage migration](../operations/deep-storage-migration.md) before updating your metadata/deep storage configs.
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These guides are targeted at single-server deployments that use the Derby metadata store and local deep storage. If you are already using a non-Derby metadata store in your single-server cluster, you can reuse the existing metadata store for the new cluster.
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These guides also provide information on migrating segments from local deep storage. A clustered deployment requires distributed deep storage like S3 or HDFS. If your single-server deployment was already using distributed deep storage, you can reuse the existing deep storage for the new cluster.
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### Metadata storage
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In `conf/druid/cluster/_common/common.runtime.properties`, replace
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"metadata.storage.*" with the address of the machine that you will use as your metadata store:
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- `druid.metadata.storage.connector.connectURI`
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- `druid.metadata.storage.connector.host`
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In a production deployment, we recommend running a dedicated metadata store such as MySQL or PostgreSQL with replication, deployed separately from the Druid servers.
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The [MySQL extension](../development/extensions-core/mysql.md) and [PostgreSQL extension](../development/extensions-core/postgresql.md) docs have instructions for extension configuration and initial database setup.
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### Deep storage
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Druid relies on a distributed filesystem or large object (blob) store for data storage. The most
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commonly used deep storage implementations are S3 (popular for those on AWS) and HDFS (popular if
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you already have a Hadoop deployment).
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#### S3
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In `conf/druid/cluster/_common/common.runtime.properties`,
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- Add "druid-s3-extensions" to `druid.extensions.loadList`.
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- Comment out the configurations for local storage under "Deep Storage" and "Indexing service logs".
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- Uncomment and configure appropriate values in the "For S3" sections of "Deep Storage" and
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"Indexing service logs".
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After this, you should have made the following changes:
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```
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druid.extensions.loadList=["druid-s3-extensions"]
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#druid.storage.type=local
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#druid.storage.storageDirectory=var/druid/segments
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druid.storage.type=s3
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druid.storage.bucket=your-bucket
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druid.storage.baseKey=druid/segments
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druid.s3.accessKey=...
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druid.s3.secretKey=...
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#druid.indexer.logs.type=file
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#druid.indexer.logs.directory=var/druid/indexing-logs
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druid.indexer.logs.type=s3
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druid.indexer.logs.s3Bucket=your-bucket
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druid.indexer.logs.s3Prefix=druid/indexing-logs
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```
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Please see the [S3 extension](../development/extensions-core/s3.md) documentation for more info.
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#### HDFS
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In `conf/druid/cluster/_common/common.runtime.properties`,
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- Add "druid-hdfs-storage" to `druid.extensions.loadList`.
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- Comment out the configurations for local storage under "Deep Storage" and "Indexing service logs".
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- Uncomment and configure appropriate values in the "For HDFS" sections of "Deep Storage" and
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"Indexing service logs".
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After this, you should have made the following changes:
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```
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druid.extensions.loadList=["druid-hdfs-storage"]
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#druid.storage.type=local
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#druid.storage.storageDirectory=var/druid/segments
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druid.storage.type=hdfs
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druid.storage.storageDirectory=/druid/segments
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#druid.indexer.logs.type=file
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#druid.indexer.logs.directory=var/druid/indexing-logs
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druid.indexer.logs.type=hdfs
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druid.indexer.logs.directory=/druid/indexing-logs
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```
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Also,
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- Place your Hadoop configuration XMLs (core-site.xml, hdfs-site.xml, yarn-site.xml,
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mapred-site.xml) on the classpath of your Druid processes. You can do this by copying them into
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`conf/druid/cluster/_common/`.
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Please see the [HDFS extension](../development/extensions-core/hdfs.md) documentation for more info.
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<a name="hadoop"></a>
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## Configure for connecting to Hadoop (optional)
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If you will be loading data from a Hadoop cluster, then at this point you should configure Druid to be aware
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of your cluster:
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- Update `druid.indexer.task.hadoopWorkingPath` in `conf/druid/cluster/middleManager/runtime.properties` to
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a path on HDFS that you'd like to use for temporary files required during the indexing process.
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`druid.indexer.task.hadoopWorkingPath=/tmp/druid-indexing` is a common choice.
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- Place your Hadoop configuration XMLs (core-site.xml, hdfs-site.xml, yarn-site.xml,
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mapred-site.xml) on the classpath of your Druid processes. You can do this by copying them into
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`conf/druid/cluster/_common/core-site.xml`, `conf/druid/cluster/_common/hdfs-site.xml`, and so on.
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Note that you don't need to use HDFS deep storage in order to load data from Hadoop. For example, if
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your cluster is running on Amazon Web Services, we recommend using S3 for deep storage even if you
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are loading data using Hadoop or Elastic MapReduce.
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For more info, please see the [Hadoop-based ingestion](../ingestion/hadoop.md) page.
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## Configure Zookeeper connection
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In a production cluster, we recommend using a dedicated ZK cluster in a quorum, deployed separately from the Druid servers.
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In `conf/druid/cluster/_common/common.runtime.properties`, set
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`druid.zk.service.host` to a [connection string](https://zookeeper.apache.org/doc/current/zookeeperProgrammers.html)
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containing a comma separated list of host:port pairs, each corresponding to a ZooKeeper server in your ZK quorum.
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(e.g. "127.0.0.1:4545" or "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002")
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You can also choose to run ZK on the Master servers instead of having a dedicated ZK cluster. If doing so, we recommend deploying 3 Master servers so that you have a ZK quorum.
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## Configuration Tuning
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### Migrating from a Single-Server Deployment
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#### Master
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If you are using an example configuration from [single-server deployment examples](../operations/single-server.md), these examples combine the Coordinator and Overlord processes into one combined process.
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The example configs under `conf/druid/cluster/master/coordinator-overlord` also combine the Coordinator and Overlord processes.
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You can copy your existing `coordinator-overlord` configs from the single-server deployment to `conf/druid/cluster/master/coordinator-overlord`.
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#### Data
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Suppose we are migrating from a single-server deployment that had 32 CPU and 256GB RAM. In the old deployment, the following configurations for Historicals and MiddleManagers were applied:
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Historical (Single-server)
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```
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druid.processing.buffer.sizeBytes=500000000
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druid.processing.numMergeBuffers=8
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druid.processing.numThreads=31
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```
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MiddleManager (Single-server)
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```
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druid.worker.capacity=8
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druid.indexer.fork.property.druid.processing.numMergeBuffers=2
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druid.indexer.fork.property.druid.processing.buffer.sizeBytes=100000000
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druid.indexer.fork.property.druid.processing.numThreads=1
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```
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In the clustered deployment, we can choose a split factor (2 in this example), and deploy 2 Data servers with 16CPU and 128GB RAM each. The areas to scale are the following:
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Historical
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- `druid.processing.numThreads`: Set to `(num_cores - 1)` based on the new hardware
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- `druid.processing.numMergeBuffers`: Divide the old value from the single-server deployment by the split factor
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- `druid.processing.buffer.sizeBytes`: Keep this unchanged
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MiddleManager:
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- `druid.worker.capacity`: Divide the old value from the single-server deployment by the split factor
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- `druid.indexer.fork.property.druid.processing.numMergeBuffers`: Keep this unchanged
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- `druid.indexer.fork.property.druid.processing.buffer.sizeBytes`: Keep this unchanged
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- `druid.indexer.fork.property.druid.processing.numThreads`: Keep this unchanged
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The resulting configs after the split:
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New Historical (on 2 Data servers)
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```
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druid.processing.buffer.sizeBytes=500000000
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druid.processing.numMergeBuffers=8
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druid.processing.numThreads=31
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```
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New MiddleManager (on 2 Data servers)
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```
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druid.worker.capacity=4
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druid.indexer.fork.property.druid.processing.numMergeBuffers=2
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druid.indexer.fork.property.druid.processing.buffer.sizeBytes=100000000
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druid.indexer.fork.property.druid.processing.numThreads=1
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```
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#### Query
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You can copy your existing Broker and Router configs to the directories under `conf/druid/cluster/query`, no modifications are needed, as long as the new hardware is sized accordingly.
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### Fresh deployment
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If you are using the example cluster described above:
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- 1 Master server (m5.2xlarge)
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- 2 Data servers (i3.4xlarge)
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- 1 Query server (m5.2xlarge)
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The configurations under `conf/druid/cluster` have already been sized for this hardware and you do not need to make further modifications for general use cases.
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If you have chosen different hardware, the [basic cluster tuning guide](../operations/basic-cluster-tuning.md) can help you size your configurations.
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## Open ports (if using a firewall)
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If you're using a firewall or some other system that only allows traffic on specific ports, allow
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inbound connections on the following:
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### Master Server
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- 1527 (Derby metadata store; not needed if you are using a separate metadata store like MySQL or PostgreSQL)
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- 2181 (ZooKeeper; not needed if you are using a separate ZooKeeper cluster)
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- 8081 (Coordinator)
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- 8090 (Overlord)
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### Data Server
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- 8083 (Historical)
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- 8091, 8100–8199 (Druid Middle Manager; you may need higher than port 8199 if you have a very high `druid.worker.capacity`)
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### Query Server
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- 8082 (Broker)
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- 8088 (Router, if used)
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> In production, we recommend deploying ZooKeeper and your metadata store on their own dedicated hardware,
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> rather than on the Master server.
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## Start Master Server
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Copy the Druid distribution and your edited configurations to your Master server.
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If you have been editing the configurations on your local machine, you can use *rsync* to copy them:
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```bash
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rsync -az apache-druid-apache-druid-0.21.1/ MASTER_SERVER:apache-druid-apache-druid-0.21.1/
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```
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### No Zookeeper on Master
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From the distribution root, run the following command to start the Master server:
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```
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bin/start-cluster-master-no-zk-server
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```
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### With Zookeeper on Master
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If you plan to run ZK on Master servers, first update `conf/zoo.cfg` to reflect how you plan to run ZK. Then, you
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can start the Master server processes together with ZK using:
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||
```
|
||
bin/start-cluster-master-with-zk-server
|
||
```
|
||
|
||
> In production, we also recommend running a ZooKeeper cluster on its own dedicated hardware.
|
||
|
||
## Start Data Server
|
||
|
||
Copy the Druid distribution and your edited configurations to your Data servers.
|
||
|
||
From the distribution root, run the following command to start the Data server:
|
||
|
||
```
|
||
bin/start-cluster-data-server
|
||
```
|
||
|
||
You can add more Data servers as needed.
|
||
|
||
> For clusters with complex resource allocation needs, you can break apart Historicals and MiddleManagers and scale the components individually.
|
||
> This also allows you take advantage of Druid's built-in MiddleManager autoscaling facility.
|
||
|
||
## Start Query Server
|
||
|
||
Copy the Druid distribution and your edited configurations to your Query servers.
|
||
|
||
From the distribution root, run the following command to start the Query server:
|
||
|
||
```
|
||
bin/start-cluster-query-server
|
||
```
|
||
|
||
You can add more Query servers as needed based on query load. If you increase the number of Query servers, be sure to adjust the connection pools on your Historicals and Tasks as described in the [basic cluster tuning guide](../operations/basic-cluster-tuning.md).
|
||
|
||
## Loading data
|
||
|
||
Congratulations, you now have a Druid cluster! The next step is to learn about recommended ways to load data into
|
||
Druid based on your use case. Read more about [loading data](../ingestion/index.md).
|
||
|
||
|
||
|
||
|
||
|
||
##### 其他硬件配置
|
||
|
||
上面的示例集群是从多种确定Druid集群大小的可能方式中选择的一个示例。
|
||
|
||
您可以根据自己的特定需求和限制选择较小/较大的硬件或较少/更多的服务器。
|
||
|
||
如果您的使用场景具有复杂的扩展要求,则还可以选择不将Druid服务混合部署(例如,独立的Historical Server)。
|
||
|
||
[基本集群调整指南](../../operations/basicClusterTuning.md)中的信息可以帮助您进行决策,并可以调整配置大小。
|
||
|
||
#### 从单服务器环境迁移部署
|
||
|
||
如果您现在已有单服务器部署的环境,例如[单服务器部署示例](chapter-3.md)中的部署,并且希望迁移到类似规模的集群部署,则以下部分包含一些选择Master/Data/Query服务等效硬件的准则。
|
||
|
||
##### Master服务
|
||
|
||
Master服务的主要考虑点是可用CPU以及用于Coordinator和Overlord进程的堆内存。
|
||
|
||
首先计算出来在单服务器环境下Coordinator和Overlord已分配堆内存之和,然后选择具有足够内存的Master服务硬件,同时还需要考虑到为服务器上其他进程预留一些额外的内存。
|
||
|
||
对于CPU,可以选择接近于单服务器环境核数1/4的硬件。
|
||
|
||
##### Data服务
|
||
|
||
在为集群Data服务选择硬件时,主要考虑可用的CPU和内存,可行时使用SSD存储。
|
||
|
||
在集群化部署时,出于容错的考虑,最好是部署多个Data服务。
|
||
|
||
在选择Data服务的硬件时,可以假定一个分裂因子`N`,将原来的单服务器环境的CPU和内存除以`N`,然后在新集群中部署`N`个硬件规格缩小的Data服务。
|
||
|
||
##### Query服务
|
||
|
||
Query服务的硬件选择主要考虑可用的CPU、Broker服务的堆内和堆外内存、Router服务的堆内存。
|
||
|
||
首先计算出来在单服务器环境下Broker和Router已分配堆内存之和,然后选择可以覆盖Broker和Router内存的Query服务硬件,同时还需要考虑到为服务器上其他进程预留一些额外的内存。
|
||
|
||
对于CPU,可以选择接近于单服务器环境核数1/4的硬件。
|
||
|
||
[基本集群调优指南](../../operations/basicClusterTuning.md)包含有关如何计算Broker和Router服务内存使用量的信息。
|
||
|
||
### 选择操作系统
|
||
|
||
我们建议运行您喜欢的Linux发行版,同时还需要:
|
||
|
||
* **Java 8**
|
||
|
||
> [!WARNING]
|
||
> Druid服务运行依赖Java 8,可以使用环境变量`DRUID_JAVA_HOME`或`JAVA_HOME`指定在何处查找Java,有关更多详细信息,请运行`verify-java`脚本。
|
||
|
||
### 下载发行版
|
||
|
||
首先,下载并解压缩发布安装包。最好首先在单台计算机上执行此操作,因为您将编辑配置,然后将修改后的配置分发到所有服务器上。
|
||
|
||
[下载](https://www.apache.org/dyn/closer.cgi?path=/druid/0.17.0/apache-druid-0.17.0-bin.tar.gz)Druid最新0.17.0release安装包
|
||
|
||
在终端中运行以下命令来提取Druid
|
||
|
||
```
|
||
tar -xzf apache-druid-0.17.0-bin.tar.gz
|
||
cd apache-druid-0.17.0
|
||
```
|
||
|
||
在安装包中有以下文件:
|
||
|
||
* `LICENSE`和`NOTICE`文件
|
||
* `bin/*` - 启停等脚本
|
||
* `conf/druid/cluster/*` - 用于集群部署的模板配置
|
||
* `extensions/*` - Druid核心扩展
|
||
* `hadoop-dependencies/*` - Druid Hadoop依赖
|
||
* `lib/*` - Druid核心库和依赖
|
||
* `quickstart/*` - 与[快速入门](chapter-2.md)相关的文件
|
||
|
||
我们主要是编辑`conf/druid/cluster/`中的文件。
|
||
|
||
#### 从单服务器环境迁移部署
|
||
|
||
在以下各节中,我们将在`conf/druid/cluster`下编辑配置。
|
||
|
||
如果您已经有一个单服务器部署,请将您的现有配置复制到`conf/druid /cluster`以保留您所做的所有配置更改。
|
||
|
||
### 配置元数据存储和深度存储
|
||
#### 从单服务器环境迁移部署
|
||
|
||
如果您已经有一个单服务器部署,并且希望在整个迁移过程中保留数据,请在更新元数据/深层存储配置之前,按照[元数据迁移](../../operations/metadataMigration.md)和[深层存储迁移](../../operations/DeepstorageMigration.md)中的说明进行操作。
|
||
|
||
这些指南针对使用Derby元数据存储和本地深度存储的单服务器部署。 如果您已经在单服务器集群中使用了非Derby元数据存储,则可以在新集群中可以继续使用当前的元数据存储。
|
||
|
||
这些指南还提供了有关从本地深度存储迁移段的信息。集群部署需要分布式深度存储,例如S3或HDFS。 如果单服务器部署已在使用分布式深度存储,则可以在新集群中继续使用当前的深度存储。
|
||
|
||
#### 元数据存储
|
||
|
||
在`conf/druid/cluster/_common/common.runtime.properties`中,使用您将用作元数据存储的服务器地址来替换"metadata.storage.*":
|
||
|
||
* `druid.metadata.storage.connector.connectURI`
|
||
* `druid.metadata.storage.connector.host`
|
||
|
||
在生产部署中,我们建议运行专用的元数据存储,例如具有复制功能的MySQL或PostgreSQL,与Druid服务器分开部署。
|
||
|
||
[MySQL扩展](../../Configuration/core-ext/mysql.md)和[PostgreSQL](../../Configuration/core-ext/postgresql.md)扩展文档包含有关扩展配置和初始数据库安装的说明。
|
||
|
||
#### 深度存储
|
||
|
||
Druid依赖于分布式文件系统或大对象(blob)存储来存储数据,最常用的深度存储实现是S3(适合于在AWS上)和HDFS(适合于已有Hadoop集群)。
|
||
|
||
##### S3
|
||
|
||
在`conf/druid/cluster/_common/common.runtime.properties`中,
|
||
|
||
* 在`druid.extension.loadList`配置项中增加"druid-s3-extensions"扩展
|
||
* 注释掉配置文件中用于本地存储的"Deep Storage"和"Indexing service logs"
|
||
* 打开配置文件中关于"For S3"部分中"Deep Storage"和"Indexing service logs"的配置
|
||
|
||
上述操作之后,您将看到以下的变化:
|
||
|
||
```json
|
||
druid.extensions.loadList=["druid-s3-extensions"]
|
||
|
||
#druid.storage.type=local
|
||
#druid.storage.storageDirectory=var/druid/segments
|
||
|
||
druid.storage.type=s3
|
||
druid.storage.bucket=your-bucket
|
||
druid.storage.baseKey=druid/segments
|
||
druid.s3.accessKey=...
|
||
druid.s3.secretKey=...
|
||
|
||
#druid.indexer.logs.type=file
|
||
#druid.indexer.logs.directory=var/druid/indexing-logs
|
||
|
||
druid.indexer.logs.type=s3
|
||
druid.indexer.logs.s3Bucket=your-bucket
|
||
druid.indexer.logs.s3Prefix=druid/indexing-logs
|
||
```
|
||
更多信息可以看[S3扩展](../../Configuration/core-ext/s3.md)部分的文档。
|
||
|
||
##### HDFS
|
||
|
||
在`conf/druid/cluster/_common/common.runtime.properties`中,
|
||
|
||
* 在`druid.extension.loadList`配置项中增加"druid-hdfs-storage"扩展
|
||
* 注释掉配置文件中用于本地存储的"Deep Storage"和"Indexing service logs"
|
||
* 打开配置文件中关于"For HDFS"部分中"Deep Storage"和"Indexing service logs"的配置
|
||
|
||
上述操作之后,您将看到以下的变化:
|
||
|
||
```json
|
||
druid.extensions.loadList=["druid-hdfs-storage"]
|
||
|
||
#druid.storage.type=local
|
||
#druid.storage.storageDirectory=var/druid/segments
|
||
|
||
druid.storage.type=hdfs
|
||
druid.storage.storageDirectory=/druid/segments
|
||
|
||
#druid.indexer.logs.type=file
|
||
#druid.indexer.logs.directory=var/druid/indexing-logs
|
||
|
||
druid.indexer.logs.type=hdfs
|
||
druid.indexer.logs.directory=/druid/indexing-logs
|
||
```
|
||
|
||
同时:
|
||
|
||
* 需要将Hadoop的配置文件(core-site.xml, hdfs-site.xml, yarn-site.xml, mapred-site.xml)放置在Druid进程的classpath中,可以将他们拷贝到`conf/druid/cluster/_common`目录中
|
||
|
||
更多信息可以看[HDFS扩展](../../Configuration/core-ext/hdfs.md)部分的文档。
|
||
|
||
### Hadoop连接配置
|
||
|
||
如果要从Hadoop集群加载数据,那么此时应对Druid做如下配置:
|
||
|
||
* 在`conf/druid/cluster/_common/common.runtime.properties`文件中更新`druid.indexer.task.hadoopWorkingPath`配置项,将其更新为您期望的一个用于临时文件存储的HDFS路径。 通常会配置为`druid.indexer.task.hadoopWorkingPath=/tmp/druid-indexing`
|
||
* 需要将Hadoop的配置文件(core-site.xml, hdfs-site.xml, yarn-site.xml, mapred-site.xml)放置在Druid进程的classpath中,可以将他们拷贝到`conf/druid/cluster/_common`目录中
|
||
|
||
请注意,您无需为了可以从Hadoop加载数据而使用HDFS深度存储。例如,如果您的集群在Amazon Web Services上运行,即使您使用Hadoop或Elastic MapReduce加载数据,我们也建议使用S3进行深度存储。
|
||
|
||
更多信息可以看[基于Hadoop的数据摄取](../../DataIngestion/hadoopbased.md)部分的文档。
|
||
|
||
### Zookeeper连接配置
|
||
|
||
在生产集群中,我们建议使用专用的ZK集群,该集群与Druid服务器分开部署。
|
||
|
||
在 `conf/druid/cluster/_common/common.runtime.properties` 中,将 `druid.zk.service.host` 设置为包含用逗号分隔的host:port对列表的连接字符串,每个对与ZK中的ZooKeeper服务器相对应。(例如" 127.0.0.1:4545"或"127.0.0.1:3000,127.0.0.1:3001、127.0.0.1:3002")
|
||
|
||
您也可以选择在Master服务上运行ZK,而不使用专用的ZK集群。如果这样做,我们建议部署3个Master服务,以便您具有ZK仲裁。
|
||
|
||
### 配置调整
|
||
#### 从单服务器环境迁移部署
|
||
##### Master服务
|
||
|
||
如果您使用的是[单服务器部署示例](chapter-3.md)中的示例配置,则这些示例中将Coordinator和Overlord进程合并为一个合并的进程。
|
||
|
||
`conf/druid/cluster/master/coordinator-overlord` 下的示例配置同样合并了Coordinator和Overlord进程。
|
||
|
||
您可以将现有的 `coordinator-overlord` 配置从单服务器部署复制到`conf/druid/cluster/master/coordinator-overlord`
|
||
|
||
##### Data服务
|
||
|
||
假设我们正在从一个32CPU和256GB内存的单服务器部署环境进行迁移,在老的环境中,Historical和MiddleManager使用了如下的配置:
|
||
|
||
Historical(单服务器)
|
||
|
||
```json
|
||
druid.processing.buffer.sizeBytes=500000000
|
||
druid.processing.numMergeBuffers=8
|
||
druid.processing.numThreads=31
|
||
```
|
||
|
||
MiddleManager(单服务器)
|
||
|
||
```json
|
||
druid.worker.capacity=8
|
||
druid.indexer.fork.property.druid.processing.numMergeBuffers=2
|
||
druid.indexer.fork.property.druid.processing.buffer.sizeBytes=100000000
|
||
druid.indexer.fork.property.druid.processing.numThreads=1
|
||
```
|
||
|
||
在集群部署中,我们选择一个分裂因子(假设为2),则部署2个16CPU和128GB内存的Data服务,各项的调整如下:
|
||
|
||
Historical
|
||
|
||
* `druid.processing.numThreads`设置为新硬件的(`CPU核数 - 1`)
|
||
* `druid.processing.numMergeBuffers` 使用分裂因子去除单服务部署环境的值
|
||
* `druid.processing.buffer.sizeBytes` 该值保持不变
|
||
|
||
MiddleManager:
|
||
|
||
* `druid.worker.capacity`: 使用分裂因子去除单服务部署环境的值
|
||
* `druid.indexer.fork.property.druid.processing.numMergeBuffers`: 该值保持不变
|
||
* `druid.indexer.fork.property.druid.processing.buffer.sizeBytes`: 该值保持不变
|
||
* `druid.indexer.fork.property.druid.processing.numThreads`: 该值保持不变
|
||
|
||
调整后的结果配置如下:
|
||
|
||
新的Historical(2 Data服务器)
|
||
|
||
```json
|
||
druid.processing.buffer.sizeBytes=500000000
|
||
druid.processing.numMergeBuffers=8
|
||
druid.processing.numThreads=31
|
||
```
|
||
|
||
新的MiddleManager(2 Data服务器)
|
||
|
||
```json
|
||
druid.worker.capacity=4
|
||
druid.indexer.fork.property.druid.processing.numMergeBuffers=2
|
||
druid.indexer.fork.property.druid.processing.buffer.sizeBytes=100000000
|
||
druid.indexer.fork.property.druid.processing.numThreads=1
|
||
```
|
||
|
||
##### Query服务
|
||
|
||
您可以将现有的Broker和Router配置复制到`conf/druid/cluster/query`下的目录中,无需进行任何修改.
|
||
|
||
#### 首次部署
|
||
|
||
如果您正在使用如下描述的示例集群规格:
|
||
|
||
* 1 Master 服务器(m5.2xlarge)
|
||
* 2 Data 服务器(i3.4xlarge)
|
||
* 1 Query 服务器(m5.2xlarge)
|
||
|
||
`conf/druid/cluster`下的配置已经为此硬件确定了,一般情况下您无需做进一步的修改。
|
||
|
||
如果您选择了其他硬件,则[基本的集群调整指南](../../operations/basicClusterTuning.md)可以帮助您调整配置大小。
|
||
|
||
### 开启端口(如果使用了防火墙)
|
||
|
||
如果您正在使用防火墙或其他仅允许特定端口上流量准入的系统,请在以下端口上允许入站连接:
|
||
|
||
#### Master服务
|
||
|
||
* 1527(Derby元数据存储,如果您正在使用一个像MySQL或者PostgreSQL的分离的元数据存储则不需要)
|
||
* 2181(Zookeeper,如果使用了独立的ZK集群则不需要)
|
||
* 8081(Coordinator)
|
||
* 8090(Overlord)
|
||
|
||
#### Data服务
|
||
|
||
* 8083(Historical)
|
||
* 8091,8100-8199(Druid MiddleManager,如果`druid.worker.capacity`参数设置较大的话,则需要更多高于8199的端口)
|
||
|
||
#### Query服务
|
||
|
||
* 8082(Broker)
|
||
* 8088(Router,如果使用了)
|
||
|
||
> [!WARNING]
|
||
> 在生产中,我们建议将ZooKeeper和元数据存储部署在其专用硬件上,而不是在Master服务器上。
|
||
|
||
### 启动Master服务
|
||
|
||
将Druid发行版和您编辑的配置文件复制到Master服务器上。
|
||
|
||
如果您一直在本地计算机上编辑配置,则可以使用rsync复制它们:
|
||
|
||
```json
|
||
rsync -az apache-druid-0.17.0/ MASTER_SERVER:apache-druid-0.17.0/
|
||
```
|
||
|
||
#### 不带Zookeeper启动
|
||
|
||
在发行版根目录中,运行以下命令以启动Master服务:
|
||
```json
|
||
bin/start-cluster-master-no-zk-server
|
||
```
|
||
|
||
#### 带Zookeeper启动
|
||
|
||
如果计划在Master服务器上运行ZK,请首先更新`conf/zoo.cfg`以标识您计划如何运行ZK,然后,您可以使用以下命令与ZK一起启动Master服务进程:
|
||
```json
|
||
bin/start-cluster-master-with-zk-server
|
||
```
|
||
|
||
> [!WARNING]
|
||
> 在生产中,我们建议将ZooKeeper运行在其专用硬件上。
|
||
|
||
### 启动Data服务
|
||
|
||
将Druid发行版和您编辑的配置文件复制到您的Data服务器。
|
||
|
||
在发行版根目录中,运行以下命令以启动Data服务:
|
||
```json
|
||
bin/start-cluster-data-server
|
||
```
|
||
|
||
您可以在需要的时候增加更多的Data服务器。
|
||
|
||
> [!WARNING]
|
||
> 对于具有复杂资源分配需求的集群,您可以将Historical和MiddleManager分开部署,并分别扩容组件。这也使您能够利用Druid的内置MiddleManager自动伸缩功能。
|
||
|
||
### 启动Query服务
|
||
将Druid发行版和您编辑的配置文件复制到您的Query服务器。
|
||
|
||
在发行版根目录中,运行以下命令以启动Query服务:
|
||
|
||
```json
|
||
bin/start-cluster-query-server
|
||
```
|
||
|
||
您可以根据查询负载添加更多查询服务器。 如果增加了查询服务器的数量,请确保按照[基本集群调优指南](../../operations/basicClusterTuning.md)中的说明调整Historical和Task上的连接池。
|
||
|
||
### 加载数据
|
||
|
||
恭喜,您现在有了Druid集群!下一步是根据使用场景来了解将数据加载到Druid的推荐方法。
|
||
|
||
了解有关[加载数据](../DataIngestion/index.md)的更多信息。
|
||
|
||
|