support externally hosted mongodb

[krancour]

Fixes #1876

cc @emilwangaa

EDIT:

I pre-built docker images so anyone can try this.

⚠️ You need to check out this branch because the chart itself has modifications.

$ export DOCKER_ORG=krancour
$ export TAG=14ff4f1

$ export MONGODB_CONNECTION_STRING=mongodb://<whatever>
$ export MONGODB_DATABASE_NAME=<whatever>

$ helm dep up charts/brigade

$ kubectl create namespace brigade

$ helm install brigade charts/brigade \
    --namespace brigade \
    --set artemis.image.repository=$DOCKER_ORG/brigade2-artemis \
    --set artemis.image.tag=$TAG \
    --set apiserver.image.repository=$DOCKER_ORG/brigade2-apiserver \
    --set apiserver.image.tag=$TAG \
    --set scheduler.image.repository=$DOCKER_ORG/brigade2-scheduler \
    --set scheduler.image.tag=$TAG \
    --set observer.image.repository=$DOCKER_ORG/brigade2-observer \
    --set observer.image.tag=$TAG \
    --set worker.image.repository=$DOCKER_ORG/brigade2-worker \
    --set worker.image.tag=$TAG \
    --set gitInitializer.linux.image.repository=$DOCKER_ORG/brigade2-git-initializer \
    --set gitInitializer.linux.image.tag=$TAG \
    --set logger.linux.image.repository=$DOCKER_ORG/brigade2-logger\
    --set logger.linux.image.tag=$TAG \
    --set mongodb.enabled=false \
    --set externalMongodb.connectionString=$MONGODB_CONNECTION_STRING \
    --set externalMongodb.databaseName=$MONGODB_DATABASE_NAME

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[krancour]

/brig run

[emilwangaa]

@krancour just tested the PR in our setup and it works really well👍 Thanks for prioritizing and getting a solution out this fast.

[krancour]

@emilwangaa thanks for test driving it!