CODEWITHSUNDEEP
cdockerknative
avinashkrc
avinashkrc

Reputation: 93

Pods is in CrashLoopBackOff and readiness probe failed for C based app

I have a knative setup with two worker nodes. After successfully testing helloworld-go sample program. I tried to wrote a simple C program that just prints environment variable "REQUEST_METHOD" and "QUERY_STRING". However pod status is "CrashLoopBackOff" and kubectl describe shows: " Readiness probe failed: Get http://192.168.203.181:8022/health: net/http: request canceled (Client.Timeout exceeded while awaiting headers)". I suspect something is wrong with my code. If possible please suggest what is wrong with my code. Dockerfile I used is this:

FROM gcc:4.9
COPY . /usr/src/test-c
WORKDIR /usr/src/test-c
RUN gcc -o test-c main.c
CMD ["./test-c"]

My C code for the same is:

#include <stdio.h>
#include <stdlib.h>

int main() {
   char* len_ = getenv("REQUEST_METHOD");
   printf("METHOD = %s, %s\n", len_, getenv("QUERY_STRING"));
}

My yaml file is:

apiVersion: serving.knative.dev/v1alpha1
kind: Service
metadata:
  name: helloworld-c
  namespace: default
spec:
  template:
    spec:
      containers:
        - image: docker.io/avinashkrc/helloworld-c:latest
          env:
            - name: TARGET
              value: "Go Sample"

Upvotes: 0

Views: 462

Answers (1)

avinashkrc
avinashkrc

Reputation: 93

I am able to solve the problem using pistache for REST api (I guess any framework should work).

Upvotes: 0

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