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triton-cns-health

A health checker for Triton CNS.

How it works

Put your own custom health check scripts into check.d. The filename must end with .sh. If any check script exits with non-zero status the metadata key triton.cns.status will be set to down. If all checks return 0 status then triton.cns.status will be set to up.

This removes service host names (e.g., name.svc.cust_uuid.cns.example.com) when status is set to down and adds them when status is set to up.

Set up

git clone https://joyent.com/bahamat/triton-cns-health
cd triton-cns-health
./install

Don't forget to add health check scripts to check.d!

A note about provisioning

When provisioning, if you include a triton.cns.services tag you should also include triton.cns.status=disabled to avoid the dns name being available before the instance is ready to serve production traffic.

Here's an example using the triton cli.

triton create base-64-lts g4-highcpu-2G --name www1 \
    --tag triton.cns.services=www \
    --metadata='{"triton.cns.status": "down"}'

For full automation you should use a user-script to bootstrap your deployement system which should then install all services as well as the health checker along with appropriate health check scripts.

License

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.