Having trouble getting prometheus and grafana working with drydock

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I already have a dashboard setup that included Watchtower prometheus data. Just to get things started I added the scrape for drydock to prometheus.yaml:

I currently have the following set for no auth and enabling metrics for the /metrics endpoint in my drydock controller docker stack (will turn auth on when that functionality has been added):

- DD_METRICS_PROMETHEUS_ENABLE=true
- DD_SERVER_METRICS_AUTH=false

- job_name: 'drydock'
    scrape_interval: 1m 
    metrics_path: '/metrics'
    static_configs:
      - targets: ['drydock:3000']

Using the following in my Grafana query:

count(dd_containers{watcher="DataVault", update_available="true"})

Not getting any data. What am I missing or doing wrong? Thanks!

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Working now. I had to set the target to my host:external-port since prometheus and drydock were in different stacks. Also set the host to all lowercase.