How to run curl in Kubernetes

Why curl in K8S

• for troubleshooting
• diagnose an issue with your app in Kubernetes.

Small Container Image for curl

• curlimages/curl - Docker Image | Docker Hub - very small image about 10MB
• redhat/ubi8 - Docker Image | Docker Hub - for redHat Family
• radial/busyboxplus:curl

Note: busybox - Official Image base image not include curl

How to use curl image

Create a new Temporary Pod (curlImages)

• Initial curl image with iterative shell

#Intial curl image with iteratve shell
kubectl run pingkungcurl1--image=curlimages/curl -i --tty -- sh

/ $ curl http://sample-svc.testapi
{"message":"pingkung_a123"}

• curl with internal IP

#curl with internal ip
kubectl run --rm -it --tty pingkungcurl1 --image=curlimages/curl --restart=Never -- 10.244.69.251:5001

• curl with k8s service (Pattern service.namespace)

#curl with service
kubectl run --rm -it --tty pingkungcurl1 --image=curlimages/curl --restart=Never -- dbpub-svc-svc.dbzone:5001