Convert MongoDB Single Node to Replica Set

Based on the system architecture of this product, MongoDB single nodes are divided into using storage component mirroring built-in MongoDB or using separately deployed MongoDB. In addition, on this basis, it is also necessary to distinguish whether to enable authentication. So it includes the following 4 situations:

Use built-in MongoDB without authentication enabled
Turn on authentication using built-in MongoDB
When using external MongoDB, authentication is not enabled
Use external MongoDB to enable authentication

Use built-in MongoDB without authentication
Use built-in MongoDB to enable authentication
Authentication is not enabled when using external MongoDB
Use external MongoDB and authentication is enabled

Built-in MongoDB refers to the MongoDB component included in the mingdaoyun-sc:3.2.0 image

Add ENV_MONGODB_DAEMON_ARGS: "--replSet sc-mongodb" in docker-compose.yaml as follows:

After adding ENV_MONGODB_DAEMON_ARGS, it will automatically convert to replica set mode. The built-in script is: rs.initiate({_id: "sc-mongodb",members:[ {_id : 1, host : "sc:27017"} ]}) (If there are other clients connecting to this MongoDB, you need to add a host resolution record for the sc service name on the client)
```
services:
  core:
    image: registry.cn-hangzhou.aliyuncs.com/mdpublic/mingdaoyun-core:7.4.2
    environment: &app-environment
      ENV_MONGODB_DAEMON_ARGS: "--replSet sc-mongodb"
```
Restart the service and execute in the root directory of the manager:
```
bash ./service.sh restartall
```

Built-in MongoDB refers to the MongoDB component included in the mingdaoyun-sc:3.2.0 image

Create keyfile file

echo $(openssl rand -base64 32) > /data/mingdao/script/volume/data/mongodb/keyfile
chmod 400 /data/mingdao/script/volume/data/mongodb/keyfile

Modify the environment variable ENV_MONGODB_DAEMON_ARGS and add --keyFile /data/mongodb/keyfile --replSet sc-mongodb

 services:
   core:
     image: registry.cn-hangzhou.aliyuncs.com/mdpublic/mingdaoyun-core:7.4.2
     environment: &app-environment
       ENV_MONGODB_DAEMON_ARGS: "--auth --keyFile /data/mongodb/keyfile --replSet sc-mongodb"

Restart the service and execute in the root directory of the manager:
```
bash ./service.sh restartall
```
Replica set conversion

Enter the storage component container
```
docker exec -it script_sc_1 bash
```

Use the root account to connect to the admin library

mongo mongodb://root:******@sc:27017/admin

Initialize the replica set (If there are other clients connecting to this MongoDB, you need to add a host resolution record for the sc service name on the client)

rs.initiate({_id: "sc-mongodb",members:[ {_id : 1, host : "sc:27017"} ]})

Restart the service again and execute in the root directory of the manager:
```
bash ./service.sh restartall
```

Restart MongoDB and append --replSet sc-mongodb to the startup command, such as:

mongod --bind_ip 0.0.0.0 --dbpath /data/mongodb --logpath /data/logs/mongodb.log --replSet sc-mongodb

Connect to MongoDB and convert replica sets

Connect to admin library
```
mongo mongodb://sc:27017/admin
```

Initialize the replica set (If there are other clients connecting to this MongoDB, but the client is not connected to the IP, you can configure the service name, but all clients need to add host resolution records for the sc service name)

rs.initiate({_id:"sc-mongodb",members:[{_id:1,host:"service-name-or-IP:27017"}]})

Restart the service and execute in the root directory of the manager:
```
bash ./service.sh restartall
```

Create a keyfile file in the MongoDB data directory (eg: /data/mongodb/)

echo $(openssl rand -base64 32) > /data/mongodb/keyfile
chmod 400 /data/mongodb/keyfile

Restart MongoDB and append --keyFile /data/mongodb/keyfile --replSet sc-mongodb to the startup command, such as:

mongod --bind_ip 0.0.0.0 --dbpath /data/mongodb --logpath /data/logs/mongodb.log --auth --keyFile /data/mongodb/keyfile --replSet sc-mongodb

Connect to MongoDB and convert replica sets

Use the root account to connect to the admin library
```
mongo mongodb://root:******@sc:27017/admin
```

rs.initiate({_id:"sc-mongodb",members:[{_id:1,host:"service-name-or-IP:27017"}]})

Restart the service and execute in the root directory of the manager:
```
bash ./service.sh restartall
```