/rocket-tutorial

Rocket tutorial

Rocket Tutorial

package main

import (
    "log"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        log.Printf("request from %v\n", r.RemoteAddr)
        w.Write([]byte("hello\n"))
    })
    log.Fatal(http.ListenAndServe(":5000", nil))
}

CGO_ENABLED=0 GOOS=linux go build -a -tags netgo -ldflags '-w' .

{
    "acVersion": "0.1.1",
    "acKind": "ImageManifest",
    "name": "coreos.com/hello-1.0.0",
    "app": {
        "exec": [
            "/bin/hello"
        ]
    },
    "annotations": {
        "authors": "Kelsey Hightower <kelsey.hightower@gmail.com>"
    }
}

actool validate hello-manifest

mkdir -p hello-app/rootfs/bin

cp hello-manifest hello-app/manifest
cp hello hello-app/rootfs/bin/

actool build hello-app hello.aci

actool validate hello.aci

Launch a local application image

sudo rkt run hello.aci

Testing with curl

curl 127.0.0.1:5000

Hosting App Container Images

Install a webserver

brew install nginx
nginx

Copy the binary

scp core@192.168.12.138:~/hello.aci .
mv hello.aci /usr/local/var/www/

Run it.

sudo rkt run http://192.168.12.1:8080/hello.aci

Launch a Docker Container with Rocket

Download and export a Docker Container

docker pull coreos/etcd

docker run --name=etcd coreos/etcd

Export the Docker Container

mkdir -p etcd-app/rootfs

docker export etcd | sudo tar -x -C etcd-app/rootfs -f -

Create the app manifest

{
    "acVersion": "0.1.1",
    "acKind": "ImageManifest",
    "name": "coreos.com/etcd",
    "app": {
        "exec": [
            "/etcd -name node0"
        ]
    },
    "annotations": {
        "authors": "Kelsey Hightower <kelsey.hightower@gmail.com>"
    }
}

cp etcd-manifest etcd-app/manifest

Build the container

actool build etcd-app etcd.aci

Launch the container with Rocket

sudo rkt run etcd.aci