MS is the abbreviation of Meta Service, the Compute-storage decoupled component of Doris, which provides metadata management and query services. The configuration field in DorisDisaggregatedMetaService is MS.

Simplest configuration

MS service is a stateless service and is usually deployed in active-standby mode. The simplest configuration is as follows:

  1. spec:
  2.   ms:
  3.     image: {msImage}
  4.     replicas: 2

Among them, {msImage} is the version of the MS service you want to deploy.

Configure resources

Add resource usage restrictions for the MS service. Take the 4c 4Gi configuration as an example:

  1. spec:
  2.   ms:
  3.     image: {msImage}
  4.     replicas: 2
  5.     requests:
  6.       cpu: 4
  7.       memory: 4Gi
  8.     limits:
  9.       cpu: 4
  10.       memory: 4Gi

Update the modified configuration to the [metadata management resources](/docs/3.0/install/cluster-deployment/k8s-deploy/compute-storage-decoupled/install-quickstart#Install DorisDisaggregatedMetaService). for Compute-storage decoupled that need to be deployed.

Customized configuration file

Configuration files are mounted on K8s through ConfigMap. Doris-Operator automates the configuration of mutual perception between Compute-storage decoupled components. When deploying MS services using customized configuration files, please do not configure FDB related configuration.

ConfigMap:

  1. apiVersion: v1
  2. data:
  3.   doris_cloud.conf: |
  4.     # // meta_service
  5.     brpc_listen_port = 5000
  6.     brpc_num_threads = -1
  7.     brpc_idle_timeout_sec = 30
  8.     http_token = greedisgood9999
  10.     # // doris txn config
  11.     label_keep_max_second = 259200
  12.     expired_txn_scan_key_nums = 1000
  14.     # // logging
  15.     log_dir = ./log/
  16.     # info warn error
  17.     log_level = info
  18.     log_size_mb = 1024
  19.     log_filenum_quota = 10
  20.     log_immediate_flush = false
  21.     # log_verbose_modules = *
  23.     # //max stage num
  24.     max_num_stages = 40
  25. kind: ConfigMap
  26. metadata:
  27.   name: doris-metaservice
  28.   namespace: default

The MS configuration using the above ConfigMap is as follows:

  1. spec:
  2.   ms:
  3.     image: {msImage}
  4.     configMaps:
  5.     - name: doris-metaservice
  6.       mountPath: /etc/doris

In actual deployment, configure the name and namespace of ConfigMap as needed, and configure the configuration information in the [Compute-storage decoupled metadata management resource](/docs/3.0/install/cluster-deployment/k8s-deploy/compute-storage-decoupled/install-quickstart#Install DorisDisaggregatedMetaService) to be deployed according to the above sample format. The startup configuration file used by the MS service is named doris_cloud.conf, so the key of the ConfigMap for mounting the startup configuration must also be doris_cloud.conf. The startup configuration must be mounted to the /etc/doris directory, that is, the mountPath is /etc/doris.

Config and install MS - 图1Tip

MS service needs to use FDB as the backend metadata storage, and the FDB service must be deployed when deploying MS service.