7.12.15. Deploying a Connector through Docker

7.12.15. Deploying a Connector through Docker
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7.12.15. Deploying a Connector through Docker

Note

Tungsten Connector is available to deploy as a Docker Image from v7.0.3 onwards.

Providing you have a license to use Tungsten Clustering, you will be able to download the docker image from the download portal of the Continuent Website.

The image is available as a gzipped tar ball, and the following steps outline how to import and use the image

Step 1 : Download the files

Once downloaded, you will need to uncompress the file and import it into docker. The following syntax can be used as an example:

shell> tar zxvf tungsten-connector-docker-7.1.4-10.tar.gz

This will result in a number of files/folders available in the tungsten-connector-docker-7.1.4-10 directry, within the path where you extracted the tar package, for example:

shell> ls -lh
total 1048848
-rw-r--r--@ 1 cssi  staff   1.3K May 24 12:16 README.txt
drwxr-xr-x@ 5 cssi  staff   160B May 24 11:45 conf/
-rw-r--r--@ 1 cssi  staff   887B May 24 12:07 docker-compose.yml
drwxr-xr-x@ 3 cssi  staff    96B May 24 11:54 security/
-rw-------@ 1 cssi  staff   499M May 24 12:38 tungsten-connector-docker-image-7.0.3-135.tar.gz

You will find a README.txt within the root folder, and also within the security folder, these files contain the same examples and steps as outlined on this page.

Step 2 : Configure the Connector

Before launching the connector, you will need to apply a number of configuration changes so that the Connector can communicate with your cluster and act in the desired mode based on your needs.

Modify the docker-compose.yml file

The file supplied looks like the following:

version: "3.9"
services:
  connector:
    ports:
      # connector listen port
      - 3306:3306
      # connector REST API listen port
      - 8096:8096
    environment:
      CONNECTOR_DATASERVICES: "alpha:db1,db2,db3"
      CONNECTOR_NAME: "connector"
    extra_hosts:
      - "db1:192.168.30.81"
      - "db2:192.168.30.82"
      - "db3:192.168.30.83"
    volumes:
      - ./conf/connector.properties:/opt/continuent/tungsten-connector/conf/connector.properties
      # if bridgeMode=OFF the next line is needed, please uncomment it
      #- ./conf/user.map:/opt/continuent/tungsten-connector/conf/user.map
      # if SSL is configured the following two lines are needed, please uncomment them
      #- ./conf/security.properties:/opt/continuent/cluster-home/conf/security.properties
      #- ./security:/opt/continuent/share
    image: "tungsten-connector:latest"
    restart: always

In this file you need to define your cluster nodes and cluster service, along with enabling various connector mode and security options. The following changes are mandatory:

Change the definition of CONNECTOR_DATASERVICES, listing your existing clusters (See below for examples).
Change the definition of CONNECTOR_NAME should you wish to rename the connector service (This is the name shown in cctrl)
Define the hosts/IP addresses with extra_hosts if your docker environment does not resolve the hostnames
By default, the connector will be running in Bridge Mode, Therefore, if enabling Proxy mode, uncomment the following user.map line within volumes
```
- ./conf/user.map:/opt/continuent/tungsten-connector/conf/user.map
```

If enabling SSL, uncomment the following two security related lines within volumes

- ./conf/security.properties:/opt/continuent/cluster-home/conf/security.properties
- ./security:/opt/continuent/share

The CONNECTOR_DATASERVICES property will need defining slightly differently depending upon your topology, the example syntax below can be used

Single Cluster

CONNECTOR_DATASERVICES="alpha:db1,db2,db3"

Composite Active/Passive Cluster

CONNECTOR_DATASERVICES="alpha:db1,db2,db3\nbeta:db4,db5,db6"

Composite Active/Active Cluster

CONNECTOR_DATASERVICES="alpha:db1,db2,db3\nbeta:db4,db5,db6\nalpha_from_beta:db1,db2,db3\nbeta_from_alpha:db4,db5,db6"

Proxy Mode Setup

By default, the connector will run in Bridge mode. If you wish to change this to Proxy mode, follow the following steps:

Uncomment the following user.map line in the docker-compose.yml file:
```
- ./conf/user.map:/opt/continuent/tungsten-connector/conf/user.map
```
Edit the conf/user.map file and add every user required to the file
Single Cluster Example:
```
app_user secret alpha
```
Composite Active Passive Example:
```
app_user secret global alpha
```
Composite Active/Active Example:
```
app_user secret global alpha,beta:beta,alpha
```
Change the bridgeMode settings in the conf/connector.properties to:
```
bridgeMode=OFF
```

Enabling Smartscale

To specifically enable Smartscale, within the conf/connector.properties file, change the useSmartScale property to true

SSL Setup

By default, SSL will be disabled. To enable it, follow these steps:

Uncomment the following lines in the docker-compose.yml file:

- ./conf/security.properties:/opt/continuent/cluster-home/conf/security.properties
- ./security:/opt/continuent/share

In the conf/connector.properties change the following properties to true:
```
ssl.capable=true
jdbc.driver.options=useSSL=true
api.useSsl=true
```

From a running Tungsten Cluster copy the following files from /opt/continuent/share folder to the security/ folder:

passwords.store
tungsten_keystore.jks
tungsten_truststore.ts
tungsten_connector_keystore.jks
tungsten_connector_truststore.ts

Step 3 : Import the Docker image

Use the following command to import the image into docker:

docker load --input tungsten-connector-docker-image-7.0.3-135.tar.gz

Step 4 : Launch the connector

Once the configuration has been applied and the image imported, you can then launch the connector using the following syntax:

docker compose up -d

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Continuent Documentation

7.12.15. Deploying a Connector through Docker

Note