We have an app running under a Google Cloud Kubernetes cluster, things are running fine in my testing scenario. We went to set up autoscaling for these pods - we'll probably never need to go to 0, but want it to scale up to (for now) 20 pods, and back down, obviously. We are deploying using faas-cli. First, tried:

faas-cli deploy --replace --update=false -f ./process-listing-image.yml \
    --gateway=https://openfaas.ihouseprd.com \
    --label "com.openfaas.scale.min=1" \
    --label "com.openfaas.scale.max=20" \
    --label "com.openfaas.scale.factor=5"

But that gave us 1 pod, and never moved. The it was suggested to use:

faas-cli deploy --replace --update=false -f ./process-listing-image.yml \
    --gateway=https://openfaas.ihouseprd.com \
    --label "com.openfaas.scale.min=0" \
    --label "com.openfaas.scale.max=20" \
    --label "com.openfaas.scale.factor=5"

But that still gave us but one pod. I most recently tried:

faas-cli deploy --replace --update=false -f ./process-listing-image.yml \
    --gateway=https://openfaas.ihouseprd.com \
    --label "com.openfaas.scale.min=5" \
    --label "com.openfaas.scale.max=20" \
    --label "com.openfaas.scale.factor=5"

Which produced 5 pods, but it hasn't scaled past that, despite there being thousands of requests waiting. Looking at the Cloud Console "Deployment Details" screen, I see the five pods, but can't tell if all 5 are working.

Any idea why these things aren't scaling?