mongo-k8s-connstr

Simple node module to provide a mongo connection string when using mongo in Kubernetes. It takes a set of kubernetes labels which is used to query the kubernetes api for matching pods.

Environment Variables

The library depends on the following environment variables.

Name | Description | Example ---- | ----------- | ------- LL_MONGO_URL | If you want to set the mongo connection string manually | mongodb://127.0.0.1/shipping
LL_MONGO_POD_LABELS | Pod labels used to select all the mongo servers, should be a comma separated list of key values | name=mongo,environment=dev
LL_MONGO_DBNAME | Name of the database you want to connect to | shipping
LL_MONGO_REPLICASET | Name of the mongo replicaset | rs0
LL_MONGO_REPLICASET_W | Write concern value (defaults to '1') | majority
LL_MONGO_REPLICASET_READPREF | Read preference value (defaults to 'primary') | primaryPreferred

How it works

If LL_MONGO_URL is set, no further manipulation is done and it is returned.

Otherwise it will check the kubernetes readonly API to return all the pods and then find the pods that match the supplied pod labels.

TODO

• handle if the mongo pods aren't up and assigned an IP yet
• tests
• filter the pods via the API