Issue with Hoop Agent Connection in k8s Deployment

[femiadewale780]

Hi team,
I've deployed hoop-gateway and hoop-agent using the Helm chart via ArgoCD on Kubernetes. The gateway is functioning correctly, but I’m having trouble with the agent’s connection.

I generated a HOOP_KEY by running the following

hoop config create --api-url=https://hoop.example.com
hoop login
hoop admin create agent app-dev

hoop admin get agents
NAME      MODE    VERSION  HOSTNAME  PLATFORM  STATUS
app-dev  standard  -     -     -               OFFLINE

The key generated was then used to configure the agent

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: hoop-agent
  namespace: argocd
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: all-clusters
  syncPolicy:
    automated:
      prune: true
      selfHeal: true
    syncOptions:
      - CreateNamespace=true
  source:
    repoURL: https://github.com/example/dev.git
    targetRevision: helm.hoop-agent-20241030T194707
    path: helm/hoop-agent
    helm:
      releaseName: hoop-agent
      values: |
        secrets:
          path: hoop-agent/agent
        image:
          repository: hoophq/hoopdev
          pullPolicy: Always
          tag: 1.27.6
        config:
          HOOP_KEY:
            secretRef: hoop-agent
            secretKey: HOOP_KEY
          LOG_LEVEL: 'debug'
          LOG_ENCODING: 'json'
  destination:
    name: dev
    namespace: hoop-dev

Logs from the Agent Pod

{"level":"warn","timestamp":"2024-10-31T15:20:33Z","logger":"agent/main.go:175","msg":"failed to connect to 127.0.0.1:8010, reason=failed connecting to streaming RPC server, err=rpc error: code = Unavailable desc = connection error: desc = \"transport: Error while dialing: dial tcp 127.0.0.1:8010: connect: connection refused\"","version":"1.27.6","backoff":"4m16s"}
{"level":"info","timestamp":"2024-10-31T15:24:49Z","logger":"agent/main.go:171","msg":"connecting to 127.0.0.1:8010, tls=false","version":"1.27.6","backoff":"4m16s"}

When I try from the command line

% export HOOP_KEY=grpc://app-dev:*******@127.0.0.1:8010?mode=standard
% hoop start agent
{"level":"info","timestamp":"2024-10-31T11:08:40-05:00","logger":"agent/main.go:166","msg":"version=1.27.7, platform=darwin/arm64, type=dsn, mode=standard, grpc_server=127.0.0.1:8010, tls=false, tlsca=false - starting agent"}
{"level":"info","timestamp":"2024-10-31T11:08:40-05:00","logger":"agent/main.go:171","msg":"connecting to 127.0.0.1:8010, tls=false","version":"1.27.7","backoff":"1s"}
{"level":"warn","timestamp":"2024-10-31T11:08:40-05:00","logger":"agent/main.go:175","msg":"failed to connect to 127.0.0.1:8010, reason=failed connecting to streaming RPC server, err=rpc error: code = Unavailable desc = connection error: desc
= \"transport: Error while dialing: dial tcp 127.0.0.1:8010: connect: connection refused\"","version":"1.27.7","backoff":"1s"}

The web app seems not to work either

Any guidance on resolving this connection issue would be greatly appreciated!

[sandromello]

Hello There!

The problem lies in your gateway configuration. When you create an agent key by default it uses the address 127.0.0.1:8010 to connect via gRPC. In order to fix that you need to configure which public address to advertise when creating an agent key. Add the configuration GRPC_URL in your values.yml and when you create new keys it will contain the address of the gateway.

If you want to fix it manually, change the address in the HOOP_KEY configuration to your public address.

[femiadewale780]

Thanks for the quick reply
After making adjustment, my current setup looks like this
GRPC_URL: 'grpc://hoop.dev.example.com:8010'

Logs from the agent

{"level":"info","timestamp":"2024-10-31T18:54:00Z","logger":"agent/main.go:171","msg":"connecting to hoop.dev.example.com:8010, tls=false","version":"1.27.6","backoff":"4m16s"}
{"level":"warn","timestamp":"2024-10-31T18:54:20Z","logger":"agent/main.go:175","msg":"failed to connect to hoop.dev.example.com:8010, reason=failed connecting to streaming RPC server, err=rpc error: code = Unavailable desc = connection error: desc = \"transport: Error while dialing: dial tcp **.231.39.240:8010: i/o timeout\"","version":"1.27.6","backoff":"4m16s"}

I'm thinking the value should be ??
GRPC_URL: 'grpcs://hoop.dev.example.com:8443'

[femiadewale780]

This resolved it
GRPC_URL: 'grpcs://hoop.dev.example.com:8443'