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				title: 'OpenIM Configuration Files and Common Configuration Item Modifications Guide'
## Configuration Files Explanation
| Configuration File              | Description                                                  |
| ------------------------------- | ------------------------------------------------------------ |
| kafka.yml                   | Configurations for Kafka username, password, address, etc.   |
| redis.yml                   | Configurations for Redis password, address, etc.             |
| minio.yml                   | Configurations for MinIO username, password, address, and external IP/domain; failing to modify external IP or domain may cause image file sending failures |
| zookeeper.yml               | Configurations for ZooKeeper user, password, address, etc.   |
| mongodb.yml                 | Configurations for MongoDB username, password, address, etc. |
| log.yml                     | Configurations for log level and storage directory.          |
| notification.yml            | Configurations for events like adding friends, creating groups, etc. |
| share.yml                   | Common configurations needed by various OpenIM services, such as secret. |
| webhooks.yml                | Configurations for URLs in Webhook.                          |
| local-cache.yml             | Local cache configurations.                                  |
| openim-rpc-third.yml        | Configurations for listening IP, port, and storage settings for images and videos in openim-rpc-third service. |
| openim-rpc-user.yml         | Configurations for listening IP and port in openim-rpc-user service. |
| openim-api.yml              | Configurations for listening IP, port, etc., in openim-api service. |
| openim-crontask.yml         | Configurations for openim-crontask service.                  |
| openim-msggateway.yml       | Configurations for listening IP, port, etc., in openim-msggateway service. |
| openim-msgtransfer.yml      | Configurations for openim-msgtransfer service.               |
| openim-push.yml             | Configurations for listening IP, port, and offline push settings in openim-push service. |
| openim-rpc-auth.yml         | Configurations for listening IP, port, and token expiration settings in openim-rpc-auth service. |
| openim-rpc-conversation.yml | Configurations for listening IP, port, etc., in openim-rpc-conversation service. |
| openim-rpc-friend.yml       | Configurations for listening IP, port, etc., in openim-rpc-friend service. |
| openim-rpc-group.yml        | Configurations for listening IP, port, etc., in openim-rpc-group service. |
| openim-rpc-msg.yml          | Configurations for listening IP, port, and whether to verify friendship before sending messages in openim-rpc-msg service. |
## Common Configuration Item Modifications
| Configuration Item Modification                       | Configuration File      |
| ----------------------------------------------------- | ----------------------- |
| Using MinIO for image and video file object storage   | 
	minio.yml             |
| Adjusting production environment logs                 | log.yml               |
| Verifying friendship before sending messages          | openim-rpc-msg.yml    |
| Modifying secret                                      | share.yml             |
| Using OSS, COS, AWS, Kodo for image and video storage | openim-rpc-third.yml  |
| Setting multiple login policy                         | openim-msggateway.yml |
| Setting up offline push                               | openim-push.yml       |
## Starting Multiple Instances of an OpenIM Service
To start multiple instances of an OpenIM service, simply increase the corresponding port numbers and modify the start-config.yml file in the project root directory. Restart the service to take effect. For example, the configuration to start 2 instances of openim-rpc-user is as follows:
yaml rpc:   registerIP: ''   listenIP: 0.0.0.0   ports: [ 10110, 10111 ]  prometheus:   enable: true   ports: [ 20100, 20101 ] 
Modify start-config.yml:
yaml serviceBinaries:   openim-rpc-user: 2