Demo Docker & Golang

This is a simple API for testing different tools.

Run project locally

1. Clone project

go get github.com/pablosilvab/golang-docker

2. Go to folder

cd ~/go/src/github.com/pablosilvab/golang-docker

3. Download dependencies

go mod download

4. Run project locally

make go-run

5. Compile the code and generate an executable

make go-build

6. Run the executable

make go-shell

Run with Docker

• Build new image

make docker-build

• Generate tag

make docker-tag

• Run container

make docker-run

Helm

Requirements

• Helm
• Tiller

Install package in Kubernetes:

make helm-install

Remove release in Kubernetes:

make helm-uninstall

List all releases:

helm ls --all

Issues

Deploy

• Cannot connect to the Docker daemon at tcp://localhost:2375. Is the docker daemon running?

Review .gitlab-ci.yml file.

Helm install

• User "system:serviceaccount:default:default" cannot get at the cluster

Grant permissions with ClusterRoleBinding.

How create charts?

helm create charts

Notes

Run elasticsearch in K8s.

To run elasticsearch in K8s for this exercise I use helm

1. Add repository elastic

helm repo add bitnami https://charts.bitnami.com/bitnami

• Install helm chart

helm install elastic bitnami/elasticsearch

• Uninstall chart

helm delete --purge elastic

• Expose the service

kubectl port-forward --namespace default svc/elastic-elasticsearch 9200:9200