Add queue-worker chart

[welteki]

Signed-off-by: Han Verstraete (OpenFaaS Ltd) [email protected]

Description

Add separate chart for the queue-worker

Motivation and Context

Allow people to set up named queues

How Has This Been Tested?

1. Use the chart to setup an additional queue

helm upgrade slow-queue --install chart/queue-worker \
  --namespace openfaas \
  --set maxInflight=5 \
  --set nats.stream.name=slow-queue \
  --set nats.consumer.durableName=slow-queue-workers

2. Deploy a function with the correct annotations

faas-cli store deploy sleep --annotation com.openfaas.queue=slow-queue

3. Invoke the function an check the logs for the slow-queue

echo "" | faas-cli invoke sleep --async 

stern slow-queue -n openfaas

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I've read the CONTRIBUTION guide
• [x] I have signed-off my commits with git commit -s
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[alexellis]

Perhaps we should add --set upstreamTimeout=15m or similar to the example?

[alexellis]

FYI this needs a rebase

[welteki]

The PR has been rebased.