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AppSignal for Kubernetes extracts metrics from Kubernetes clusters. After adding the AppSignal for Kubernetes deployment to your cluster, a Cluster Metrics section appears for your AppSignal application, displaying metrics for each node and each pod, as well as an overview of your cluster.

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Installation

To start reporting Kubernetes cluster metrics to AppSignal:
  1. Store your AppSignal API key in a secret
  2. Deploy to your cluster

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Store your AppSignal API key in a secret

Create a secret in your Kubernetes cluster containing your AppSignal app-specific push API key: 
kubectl create secret generic appsignal -n appsignal --from-literal=api-key=<APPSIGNAL_API_KEY>
You can find your app-specific push API key in your application’s settings.

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Deploy to your cluster

Once you’ve created the AppSignal API key secret, add the AppSignal for Kubernetes deployment to your cluster: 
kubectl apply -f https://raw.githubusercontent.com/appsignal/appsignal-kubernetes/main/deployment.yaml
This will create the appsignal namespace and deploy AppSignal for Kubernetes in that namespace. Alternatively, install AppSignal for Kubernetes through its Helm chart:
Bash
helm repo add appsignal-kubernetes https://appsignal.github.io/appsignal-kubernetes
helm install appsignal-kubernetes appsignal-kubernetes/appsignal-kubernetes --create-namespace --namespace appsignal
Once configured, AppSignal for Kubernetes will start reporting metrics automatically.

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Cluster Metrics

In AppSignal, the Host Metrics page will now be replaced with a Cluster Metrics page to show information about pods and nodes in your cluster. You will be able to see graphs representing useful metrics over time, such as:
  • CPU Usage: CPU usage stats per node or pod
  • Memory Usage: memory usage statistics, comparing the used memory to what’s available per node or pod
  • Swap Usage: swap usage statistics, comparing the used swap to what’s available per node or pod
  • Disk Usage: disk usage statistics, comparing the used disk space to what’s available per node
  • Network usage: network usage, split by received and transmitted bytes, per node

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Support

If you are experiencing any difficulties configuring your application’s Kubernetes metrics, contact support, and we’ll help you get your metrics flowing.