Using a Client to Connect to a Common ClickHouse Cluster

Installing the ClickHouse Client

1. Prepare a Linux ECS. For details, see Preparing an ECS.
2. Download a client. Log in to the CloudTable management console. In the navigation pane on the left, choose Help. On the right of the page, click Download Client and Client Verification File to download the client installation package and client verification file.
3. Install the client.
   1. Use the SSH login tool to remotely log in to the Linux ECS through the EIP.

      For details, see "ECSs> Logging In to a Linux ECS > Login Using an SSH Password" in the Elastic Cloud Server User Guide.

   2. Go to the root directory of the SSH login tool.

      cd /
      
      

   3. Create a folder in the root directory.

      mkdir Folder name
      
      

   4. Go to the directory of the created folder.

      cd /Folder name/
      
      

   5. Place the client in the directory.
   6. Decompress the client package.

      tar  -zxf   Client package name
      
      

   7. Decompress the client verification file to the same directory as the client.
      1. Decompress the client verification file.

         cd <Path for storing the client verification file >
         tar -xzvf Client_sha256.tar.gz
         
         

      2. Obtain the client verification code.

         sha256sum ClickHouse_Client_23.3.tar.gz
         
         

      3. Check the verification code in the client verification file and compare it with the client verification code. A match indicates no tampering, while a mismatch suggests tampering.

         less ClickHouse_Client_23.3.tar.gz.sha256
         
         

   8. Go to the clickhouse folder and load the .so file.

      sh install.sh
      
      

   9. Go to the bin directory.

      cd bin/
      
      

      Grant the 700 permission to the directory.

      chmod 700 clickhouse
      
      

4. After the client is installed, run the following command to connect to the ClickHouse cluster. For details about the port, see Table 1.

   ./clickhouse client --host Private IP address of the cluster   --port  9000  --user admin --password Password
   
   

   • Private IP address of the cluster: cluster access address on the cluster details page. Replace it with the access address of the cluster you purchased.
   • Password: the password set when you purchase the cluster. If there are special characters, use backslashes (\) to escape them. If the password is enclosed in single quotation marks ('), the special characters do not need to be escaped.

   Table 1 Custom security rules

   Direction	Action	Port/Range	Type	Destination/Source Address	Usage
   Outbound	Allow	All	IPv4/IPv6	0.0.0.0/0	Permit in the outbound direction
   Inbound	Allow	8123		Security group of the CloudTable ClickHouse cluster	ClickHouse HTTP port number
   	Allow	9000			ClickHouse TCP port number
   	Allow	8443			ClickHouse HTTPS port number
   	Allow	9440			Secure TCP security port of ClickHouse