Im trying to create a kubernetes pod using the docker image nigelpoultron/pluralsight-docker-ci:latest but the pod is in error state while pulling the docker image.

# kubectl get pods
NAME                          READY   STATUS         RESTARTS   AGE
hello-pod                     0/1     ErrImagePull   0          110s

And after sometime

# kubectl get pods
NAME                          READY   STATUS             RESTARTS   AGE
hello-pod                     0/1     ImagePullBackOff   0          2m55s

Below is the kubectl describe pods output

# kubectl describe pods
Name:         hello-pod
Namespace:    default
Priority:     0
Node:         minikube/10.1.1.163
Start Time:   Tue, 08 Oct 2019 14:17:51 +0000
Labels:       <none>
Annotations:  <none>
Status:       Pending
IP:           172.17.0.7
IPs:
  IP:  172.17.0.7
Containers:
  hello-ctr:
    Container ID:
    Image:          nigelpoultron/pluralsight-docker-ci:latest
    Image ID:
    Port:           8080/TCP
    Host Port:      0/TCP
    State:          Waiting
      Reason:       ErrImagePull
    Ready:          False
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-65rsv (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True
Volumes:
  default-token-65rsv:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-65rsv
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type     Reason     Age        From               Message
  ----     ------     ----       ----               -------
  Normal   Scheduled  <unknown>  default-scheduler  Successfully assigned default/hello-pod to minikube
  Normal   Pulling    9s         kubelet, minikube  Pulling image "nigelpoultron/pluralsight-docker-ci:latest"
  Warning  Failed     8s         kubelet, minikube  Failed to pull image "nigelpoultron/pluralsight-docker-ci:latest": rpc error: code = Unknown desc = Error response from daemon: pull access denied for nigelpoultron/pluralsight-docker-ci, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
  Warning  Failed     8s         kubelet, minikube  Error: ErrImagePull
  Normal   BackOff    7s         kubelet, minikube  Back-off pulling image "nigelpoultron/pluralsight-docker-ci:latest"
  Warning  Failed     7s         kubelet, minikube  Error: ImagePullBackOff

I was able to pull the docker image though

# docker pull nigelpoulton/pluralsight-docker-ci
Using default tag: latest
latest: Pulling from nigelpoulton/pluralsight-docker-ci
[DEPRECATION NOTICE] registry v2 schema1 support will be removed in an upcoming release. Please contact admins of the docker.io registry NOW to avoid future disruption.
a3ed95caeb02: Pull complete
3b231ed5aa2f: Pull complete
7e4f9cd54d46: Pull complete
929432235e51: Pull complete
6899ef41c594: Pull complete
0b38fccd0dab: Pull complete
Digest: sha256:7a6b0125fe7893e70dc63b2c42ad779e5866c6d2779ceb9b12a28e2c38bd8d3d
Status: Downloaded newer image for nigelpoulton/pluralsight-docker-ci:latest
docker.io/nigelpoulton/pluralsight-docker-ci:latest

Any idea how to fix this? I also tried without the "latest" tag but still getting the same error

mocha
module.js:328
throw err;
^

Error: Cannot find module 'supertest'
at Function.Module._resolveFilename (module.js:326:15)
at Function.Module._load (module.js:277:25)
at Module.require (module.js:354:17)
at require (internal/module.js:12:17)
at Object. (/home/ubuntu/pluralsight-docker-CI/test/test.js:4:15)
at Module._compile (module.js:410:26)
at Object.Module._extensions..js (module.js:417:10)
at Module.load (module.js:344:32)
at Function.Module._load (module.js:301:12)
at Module.require (module.js:354:17)
at require (internal/module.js:12:17)
at /opt/circleci/nodejs/v4.2.6/lib/node_modules/mocha/lib/mocha.js:219:27
at Array.forEach (native)
at Mocha.loadFiles (/opt/circleci/nodejs/v4.2.6/lib/node_modules/mocha/lib/mocha.js:216:14)
at Mocha.run (/opt/circleci/nodejs/v4.2.6/lib/node_modules/mocha/lib/mocha.js:468:10)
at Object. (/opt/circleci/nodejs/v4.2.6/lib/node_modules/mocha/bin/_mocha:403:18)
at Module._compile (module.js:410:26)
at Object.Module._extensions..js (module.js:417:10)
at Module.load (module.js:344:32)
at Function.Module._load (module.js:301:12)
at Function.Module.runMain (module.js:442:10)
at startup (node.js:136:18)
at node.js:966:3

mocha returned exit code 1

The container is running always, When I try to stop those containers it stops for only 2-3 seconds and run automatically. Detail can be found in below screenshot. Please help me out to stop the container!

I have tried building the docker image locally as I wanted to make some changes to the app. I built it with docker build -t <<Image Name>> . .

I simply tried running with a docker run -d -p 8080:8080 <<Image Name>> . It crashes every-time. How do I run the container in daemon mode? Can you please share a docker-compose.yml file?

I had to search the warehouse address by the author's name

https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#workdir explains better than I ever could

AFAIK without using a shell-script handler, signals can't be passed to the running process. This means we need a handler to allow graceful startup and shutdown of the app.

This could bite you when it comes to testing, but most likely production, unless you purge the machine and any volumes prior to launching which is more time and effort, and might make everyone dislike in live environments.

Let me know if you're open to receiving a PR.

Hi Nigel, I did your free course on the Pluralsight Docker deep dive and have been reading the book also. both of them are phenomenal. I want to ask you that if you want to link the third party storage applications to the docker what would be the preferred choice. I mean to say that lets say i build a docker and i have build another docker and i am used mount to mount the volume from the disk but is there a way that i can attach the external mounts on the docker.

I actually mounted both of the docker containers into a swarm cluster i created and connected both of them through a network and both of them are exchanging the files well.

Any guess how to mount a large volume of the external data storage to the docker images.

Best regards, Gaurav

content of my variable DOCKER_HUB_TRIGGER:

curl -H "Content-Type:application/json" --data '{"build":true}' -X POST https://registry.hub.docker.com/u/hominhdat/docker-ci/trigger/132b6751-fb48-4c47-b141-96d6de2f9076/

this is error:

$DOCKER_HUB_TRIGGER
<html><body><h1>400 Bad request</h1>
Your browser sent an invalid request.
</body></html>

I run the curl above in teminal command line the all thing work perfect. But the environment variable in CircleCI got error. Do you know why?