Connecting to a Replica Set Instance Using Mongo Shell (Public Network)

For details about how to install a MongoDB client, see How Can I Install a MongoDB Client?

The version of the installed MongoDB client must be the same as the instance version.

The following describes how to upload the certificate to a Linux and Window ECS:

• In Linux, run the following command:
  scp<IDENTITY_FILE><REMOTE_USER>@<REMOTE_ADDRESS>:<REMOTE_DIR>

  

  • IDENTITY_FILE is the directory where the root certificate resides. The file access permission is 600.
  • REMOTE_USER is the ECS OS user.
  • REMOTE_ADDRESS is the ECS address.
  • REMOTE_DIR is the directory of the ECS to which the root certificate is uploaded.
• In Windows, upload the root certificate using a remote connection tool.

Method 1: Using a public network connection address

Example command:

./mongo "<Public network connection address>" --ssl --sslCAFile<FILE_PATH> --sslAllowInvalidHostnames

Parameter description:

• Public Network Connection Address: On the Instances page, click the instance to switch to the Basic Information page. In the navigation pane on the left, choose Connections. Click the Public Connection tab and obtain the public network connection address.

  The format of the public connection address is as follows. The database username rwuser and authentication database admin cannot be changed.

  mongodb://rwuser:<password>@192.168.xx.xx:8635/test?authSource=admin

  Pay attention to the following parameters in the public network connection address:

  Table 1 Parameter description

  Parameter	Description
  rwuser	Account name, that is, the database username.
  <password>	Password for the database account. Replace it with the actual password. If the password contains at signs (@), exclamation marks (!), or percent signs (%), replace them with hexadecimal URL codes (ASCII) %40, %21, and %25 respectively. For example, if the password is ****@ %***!, the corresponding URL code is **** %40%25*** %21.
  192.168.xx.xx:8635	The EIP and port bound to the node of the replica set instance.
  authSource=admin	The authentication database of user rwuser must be admin. authSource=admin is fixed in the command.

• FILE_PATH is the path for storing the root certificate.
• --sslAllowInvalidHostnames: The replica set certificate is generated using the internal management IP address to ensure that internal communication does not occupy resources such as the user IP address and bandwidth. --sslAllowInvalidHostnames is needed for the SSL connection through a public network.

Command example:

./mongo "mongodb://rwuser:<password>@192.168.xx.xx:8635/test?authSource=admin" --ssl --sslCAFile/tmp/ca.crt --sslAllowInvalidHostnames

• If you connect to an instance over a public HA address, add double quotation marks before and after the connection information.
• To improve read and write performance and prevent errors from being reported when data is written from the client after a primary/standby switchover. For details about how to connect to an instance in HA mode, see Connecting to a Replica Set Instance for Read and Write Separation and High Availability.

Method 2: Using an EIP

Example command:

./mongo --host <DB_HOST> --port <DB_PORT> -u <DB_USER> -p --authenticationDatabaseadmin --ssl --sslCAFile<FILE_PATH> --sslAllowInvalidHostnames

Parameter description:

• DB_HOST is the EIP bound to the instance node to be connected.

  On the Instances page, click the instance to go to the Basic Information page. Choose Connections> Public Connection and obtain the EIP of the corresponding node.

• DB_PORT is the database port. The default port number is 8635.

  You can click the instance to go to the Basic Information page. In the navigation pane on the left, choose Connections. On the displayed page, click the Public Connection tab and obtain the port from the Database Port field in the Basic Information area.

  Figure 3 Obtaining the port
  
• DB_USER is the database user. The default value is rwuser.
• FILE_PATH is the path for storing the root certificate.
• --sslAllowInvalidHostnames: The replica set certificate is generated using the internal management IP address to ensure that internal communication does not occupy resources such as the user IP address and bandwidth. --sslAllowInvalidHostnames is needed for the SSL connection through a public network.

Enter the database account password when prompted:

Enter password:

Command example:

./mongo --host 192.168.xx.xx --port 8635 -u rwuser -p --authenticationDatabase admin --ssl --sslCAFile /tmp/ca.crt --sslAllowInvalidHostnames

• The primary node of the replica set is connected.

  replica:PRIMARY>

• The standby node of the replica set is connected.

  replica:SECONDARY>

Method 1: Using a public network connection address

Example command:

./mongo "<Public network address>"

Public Network Connection Address: On the Instances page, click the instance to switch to the Basic Information page. In the navigation pane on the left, choose Connections. Click the Public Connection tab and obtain the public network connection address.

The format of the public connection address is as follows. The database username rwuser and authentication database admin cannot be changed.

mongodb://rwuser:<password>@192.168.xx.xx:8635/test?authSource=admin

Pay attention to the following parameters in the public connection address:

Command example:

./mongo "mongodb://rwuser:<password>@192.168.xx.xx:8635/test?authSource=admin"

• If you connect to an instance over a public HA address, add double quotation marks before and after the connection information.
• To improve read and write performance and prevent errors from being reported when data is written from the client after a primary/standby switchover. you are advised to connect to an instance using the HA connection address. For details, see Connecting to a Replica Set Instance for Read and Write Separation and High Availability.

Method 2: Using an EIP

Example command:

./mongo --host <DB_HOST> --port <DB_PORT> -u <DB_USER> -p --authenticationDatabase admin

Parameter description:

• DB_HOST is the EIP bound to the instance node to be connected.

  On the Instances page, click the instance to go to the Basic Information page. Choose Connections> Public Connection and obtain the EIP of the corresponding node.

• DB_PORT is the database port. The default port number is 8635.

  You can click the instance to go to the Basic Information page. In the navigation pane on the left, choose Connections. On the displayed page, click the Public Connection tab and obtain the port from the Database Port field in the Basic Information area.

  Figure 4 Obtaining the port
  
• DB_USER is the database user. The default value is rwuser.

Enter the database account password when prompted:

Enter password:

Command example:

./mongo --host 192.168.xx.xx --port 8635 -u rwuser -p --authenticationDatabase admin

• The primary node of the replica set is connected.

  replica:PRIMARY>

• The standby node of the replica set is connected.

  replica:SECONDARY>