Setup Master Data Centre

Introduction

The Master Data Centre (DC) will contain all the standard components of a standard on-premises installation with the addition of one additional component, the multi-data-centre-bridge.

Prerequisites

We will assume that your account manager has provided you with a valid MDCB and Dashboard License and the command to enable you to download the MDCB package. We will assume that the following components are up and running in your master DC:

• MongoDB (check supported versions)
• Redis (check supported versions)
• Dashboard
• Gateway / Gateway Cluster
• Working Tyk-Pro On Premises installation

Default Ports

MDCB Component Installation

The MDCB component will only need to be able to connect to Redis and MongoDB directly from within the master DC. It does not require access to the Tyk Gateway(s) or Dashboard application. The MDCB component will however by default expose an RPC service on port 9091, which worker DCs will need connectivity to. You should also have received a command to run containing a token to download the relevant MDCB package from PackageCloud.

curl -s https://TOKEN:@packagecloud.io/install/repositories/tyk/tyk-mdcb/script.deb.sh | sudo bash

curl -s https://TOKEN:@packagecloud.io/install/repositories/tyk/tyk-mdcb/script.rpm.sh | sudo bash

After the relevant script for your distribution has run, the script will let you know it has finished with the following message:

The repository is setup! You can now install packages.

You will now be able to install MDCB as follows:

sudo apt-get install tyk-sink

Or

sudo yum install tyk-sink

Configuration

Configuration Example

Once installed, modify your /opt/tyk-sink/tyk_sink.conf file as follows:

{
  "listen_port": 9091,
  "healthcheck_port": 8181,
  "server_options": {
    "use_ssl": false,
    "certificate": {
      "cert_file": "<path>",
      "key_file": "<path>"
    },
    "min_version": 771
  },
  "storage": {
    "type": "redis",
    "host": "localhost",
    "port": 6379,
    "username": "",
    "password": "",
    "enable_cluster": false,
    "redis_use_ssl": false,
    "redis_ssl_insecure_skip_verify": false
  },
  "security": {
    "private_certificate_encoding_secret": "<gateway-secret>"
  },
  "hash_keys": true,
  "forward_analytics_to_pump": true,
  "ignore_tag_prefix_list": [
    
  ],
  "analytics": {
    "mongo_url": "mongodb://localhost/tyk_analytics"
    "mongo_use_ssl": false,
    "mongo_ssl_insecure_skip_verify": false
  },
  "license": "MDCB_LICENSE_KEY"
}

Configuration Reference

You should now be able to start the MDCB service, check that it is up and running and ensure that the service starts on system boot:

sudo systemctl start tyk-sink

sudo systemctl enable tyk-sink

Health check

It is possible to perform a health check on the MDCB service. This allows you to determine if the service is running, so is useful when using MDCB with load balancers.

MDCB uses a specific port for health checks. This is defined by the healthcheck_port configuration setting, and defaults to 8181. Do not use the standard MDCB listen port (listen_port) for MDCB health checks.

To use the health check service, call the /health endpoint i.e. http://my-mdcb-host:8181/health. This will return a HTTP 200 OK response if the service is running.

Troubleshooting

Check that the MDCB service is running

> sudo systemctl status tyk-sink

Should Return:

tyk-sink.service - Multi Data Centre Bridge for the Tyk API Gateway

  Loaded: loaded (/usr/lib/systemd/system/tyk-sink.service; enabled; vendor preset: disabled)

  Active: active (running) since Thu 2018-05-03 09:39:37 UTC; 3 days ago
  Main PID: 1798 (tyk-sink)

  CGroup: /system.slice/tyk-sink.service

      └─1798 /opt/tyk-sink/tyk-sink -c /opt/tyk-sink/tyk_sink.conf

Check that MDCB is listening on port 9091

> sudo netstat -tlnp

Should Return:

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
...
tcp6       0      0 :::9091                 :::*                    LISTEN      1798/tyk-sink

Check the logs for MDCB

> sudo journalctl -u tyk-sink 

Add the -f flag to follow the log. The command should return output similar to this:

-- Logs begin at Thu 2018-05-03 09:30:56 UTC, end at Mon 2018-05-07 08:58:23 UTC. --
May 06 11:50:37 master tyk-sink[1798]: time="2018-05-06T11:50:37Z" level=info msg="RPC Stats:{\"RPCCalls\":0,\"RPCTime\":0,\"Byte
May 06 11:50:38 master tyk-sink[1798]: time="2018-05-06T11:50:38Z" level=info msg="RPC Stats:{\"RPCCalls\":0,\"RPCTime\":0,\"Byte
...
May 06 11:50:42 master tyk-sink[1798]: time="2018-05-06T11:50:42Z" level=info msg="Ping!"

Gateway config

Before a worker node can connect to MDCB, it is important to enable the organisation that owns all the APIs to be distributed to be allowed to utilise Tyk MDCB. To do this, the organisation record needs to be modified with two flags using the Tyk Dashboard Admin API.

To make things easier, we will first set a few environment variables:

1.export DASH_ADMIN_SECRET=<YOUR_ADMIN_SECRET>

You can find <YOUR_ADMIN_SECRET> in tyk_analytics.conf file under admin_secret field or TYK_DB_ADMINSECRET environment variable.

2.export DASH_URL=<YOUR_DASH_URL>

This is the URL you use to access the Dashboard (including the port if not using the default port).

3.export ORG_ID=<YOUR_ORG_ID>

You can find your organisation id in the Dashboard, under your user account details.

4.Send a GET request to the Dashboard API to /admin/organisations/$ORG_ID to retrieve the organisation object. In the example below, we are redirecting the output json to a file myorg.json for easy editing.

curl $DASH_URL/admin/organisations/$ORG_ID -H "Admin-Auth: $DASH_ADMIN_SECRET" | python -mjson.tool > myorg.json

5.Open myorg.json in your favourite text editor and add the following fields as follows. New fields are between the ... .

{
  "_id": "55780af69b23c30001000049",
  "owner_slug": "portal-test",
  ...
  "hybrid_enabled": true,
  "event_options": {
    "key_event": {
      "email": "test@test.com"
    },
    "hashed_key_event": {
      "email": "test@test.com"
    }
  },
  ...
  "apis": [
    {
      "api_human_name": "HttpBin (again)",
      "api_id": "2fdd8512a856434a61f080da67a88851"
    }
  ]
}

** Field Reference **

hybrid_enabled: Allows a worker to login as an organisation member into MDCB

event_options: Enables key events such as updates and deletes, to be propagated to the various instance zones. API Definitions and Policies will be propagated by default, as well as the Redis key events, meaning that hashed and not hashed key events will be propagated by default in Redis and any config related to hashed_key_event.redis or key_event.redis will not be taken into consideration.

6.Update your organisation with a PUT request to the same endpoint, but this time, passing in your modified myorg.json file.

curl -X PUT $DASH_URL/admin/organisations/$ORG_ID -H "Admin-Auth: $DASH_ADMIN_SECRET" -d @myorg.json

This should return:

{"Status":"OK","Message":"Org updated","Meta":null}