TL; DR: Inspektor Gadget is now available as an addon in Minikube .
When creating a tool for Kubernetes, it’s crucial to be able to test it with various cluster configurations. In the case of Inspektor Gadget, we wanted to:
- Run it against a cluster of multiple Kubernetes nodes .
- Test it against different
container runtimes
. (
docker,containerdandcri-o). - Validate our changes locally without pushing the image to a container registry.
- Cover the above scenarios both in the development and in the Continuous Integration (CI) pipeline quickly.
With minikube we can start a cluster locally using minikube start and combining it with flags like --container-runtime or --nodes as needed.
We use the same flow to test our changes in
GitHub Actions
as:
test-integration-minikube:
name: Integration Tests
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
runtime: [docker, containerd, cri-o]
steps:
- name: Setup minikube
uses: ./.github/actions/setup-minikube
with:
runtime: ${{ matrix.runtime }}
multi-node: true
- name: Run integration tests
uses: ./.github/actions/run-integration-tests
. . .
. . .
So minikube works great when developing and testing cloud-native applications. On the other hand, having a deeper understanding of the applications
when running in a minikube cluster would be fantastic and Inspektor Gadget might just be the right tool for it. To facilitate this,
now you can use the
inspektor-gadget addon
in minikube
v1.31.0
:
$ minikube addons enable inspektor-gadget
š The 'inspektor-gadget' addon is enabled
$ kubectl get pods -n gadget
NAME READY STATUS RESTARTS AGE
gadget-zwln9 1/1 Running 0 19s
Afterward, you can interact with the cluster using
kubectl-gadget
. Here is an example using the tcp top gadget:
$ kubectl gadget top tcp --all-namespaces
NODE NAMESPACE POD CONTAINER PID COMM IP REMOTE LOCAL SENT RECV
minikube kube-system kube-apiserver-minikube kube-apiserver 762760 kube-apiservā¦ 6 :0 :0 68.29KiB 541B
minikube kube-system etcd-minikube etcd 762749 etcd 4 :0 :0 47.61KiB 331B
minikube kube-system kube-apiserver-minikube kube-apiserver 762760 kube-apiservā¦ 6 :0 :0 15.39KiB 117B
minikube kube-system kube-scheduler-minikube kube-scheduler 762764 kube-schedulā¦ 4 :0 :0 2.49KiB 564B
The list of gadgets is available here . Feel free to try the addon and share your valuable feedback. We would like to thank the minikube maintainers for their reviews and Santhosh Nagaraj (@yolossn) for making it happen!
Happy Inspekting!
