Container bundled with utilities for network testing

Run the Node.JS application locally

npm init -y
npm install express
node app.js

Open http://localhost:3000

The application at the moment does not have any functionality but only serves as a placeholder for potentially adding features later on. Network testing is carried out by connecting a shell into the running container and performing some diagnostic commands as shown in the sections below.

Connect to the Cloud Platform AWS EKS cluster

Login to https://login.live.cloud-platform.service.justice.gov.uk and download the ~/.kube/config file.

Minimize the permissions on the file

chmod 600 ~/.kube/config

Tell kubectl to use this config

kubectl config use-context live.cloud-platform.service.justice.gov.uk

Connect a shell into the running container

kubectl config set-context --current --namespace=nettest
kubectl get pods
kubectl exec --stdin --tty nettest-5948d76c47-g56s2 -- bash

Example tests to run from within the running container

Check if the container has access to the internet

curl ipinfo.io

Check if the container can access port 1521 at the IP address 10.26.12.202

curl --connect-timeout 5 10.26.12.202:1521

In the above

• curl: (28) Connection timed out after 5001 milliseconds means NO
• curl: (56) Recv failure: Connection reset by peer means YES

Run a speed test

iperf3 -c ping.online.net -p 5209

How to redeploy the container into the Cloud Platform

Change the application code and/or the Dockerfile

Build the docker image

docker build -t nettest .

Retrieve ECR info

cloud-platform decode-secret -n nettest -s ecr-repo-nettest

Configure the AWS profile

~/.aws/config

[profile nettest]
region = eu-west-2
output=json
aws_access_key_id=<refer to the ECR info above>
aws_secret_access_key=<refer to the ECR info above>

Login to the repository

aws ecr get-login-password --region eu-west-2 --profile nettest \
| docker login --username AWS --password-stdin \
754256621582.dkr.ecr.eu-west-2.amazonaws.com

Tag the image and push it to your ECR

docker tag nettest 754256621582.dkr.ecr.eu-west-2.amazonaws.com/modernisation-platform/nettest-ecr:1.2

Push

docker push 754256621582.dkr.ecr.eu-west-2.amazonaws.com/modernisation-platform/nettest-ecr:1.2

Update the image in kubectl_deploy/deployment.yaml, then deploy

kubectl -n nettest apply -f kubectl_deploy

Open https://nettest.apps.live.cloud-platform.service.justice.gov.uk

Additional useful commands

kubectl delete pod nettest-76bfd79fd9-9xfr6
kubectl describe pod nettest-76bfd79fd9-9xfr6

References

1. https://user-guide.cloud-platform.service.justice.gov.uk/documentation/getting-started/env-create.html#creating-a-cloud-platform-environment