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cvallance / mongo-k8s-sidecar

Kubernetes sidecar for Mongo
MIT License
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Using this sidecar disables running docker-entrypoint scripts #121

Open alitoufighi opened 4 years ago

alitoufighi commented 4 years ago

I am stuck in a situation where I need to populate my Replica Set with some data, while using this sidecar to initiate the Replica Set and scale it automatically.

What I have is a mongo container with a script mounted in /docker-entrypoint-initdb.d/ and running this sidecar aside it. Since this sidecar runs asynchronously with the mongo, we have no guarantee when mongo's docker entrypoint script will check for its data directory being empty, hence by running mongo commands, this sidecar will cause the data directory to be not empty.

alitoufighi commented 4 years ago

To solve this, I think a simple sleep would be a workaround. A better fix would be watching data directory until it becomes non-empty, and then running workloop.

alitoufighi commented 4 years ago

I had forgotten that you can't write to a mongod started with --replSet option when a Replica Set is not initiated. So my above solutions are not valid for this case. I think the problem was with my approach to initialize my replica set database in this way. If anyone can confirm this, I think we can close the issue.