tonydawson1000/ocp-go-api

A very simple HTTP API written in Go

ocp-go-api

A very simple stateless HTTP API written in Go

---

Install Go (from linux CLI)

Set the Go Version

• export VERSION=1.18.3

Download the Go archive.

• curl -O https://dl.google.com/go/go$VERSION.linux-amd64.tar.gz

Verify the SHA256 Checksum (against the downloads page).

• sha256sum go$VERSION.linux-amd64.tar.gz

Extract the tarball into the /usr/local directory.

• tar -C /usr/local -xzf go$VERSION.linux-amd64.tar.gz

Add the Go binaries to your $PATH.

• export PATH=$PATH:/usr/local/go/bin
• To persist this across bash sessions, add to ~/.bashrc

Test Go Install worked

• go version

---

Build, Run and Test

Build the App

• go build cmd/hello/hello.go

Run the App (from a terminal)

• ./hello

Test the App (from a different terminal) - Note the Hostname / Machine Name

• curl localhost:8180
• curl localhost:8180/test
• curl localhost:8180/anyurihere/1/2/3/4

---

Build and upload a Container Image to public Container Registry

Build Image

• nerdctl build -t <image-name> .
• e.g. - nerdctl build -t tonydawson1000/ocp-go-api .

Verify (List) Image

• nerdctl images

Run a Local Container Instance

• nerdctl run --name hello-go --rm -p 8180:8180 <image-name>
• e.g. - nerdctl run --name hello-go --rm -p 8180:8180 tonydawson1000/ocp-go-api

Test the App (from a different terminal) - Note the Hostname / ContainerId

• curl localhost:8180
• curl localhost:8180/test
• curl localhost:8180/anyurihere/1/2/3/4

Push to public Container Registry (Docker Hub)

• Login (Default Docker Hub)
  • nerdctl login
• Push
  • nerdctl push <image-name>:<tag>
  • e.g. - nerdctl push tonydawson1000/ocp-go-api:latest