Setup Docker Swarm Cluser

docker-compose.yml

version: "3"

services:
  visualizer:
    image: dockersamples/visualizer:stable
    ports:
      - 8080:8080
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock"
    deploy:
      placement:
        constraints: [node.role == manager]

  whoami:
    image: jwilder/whoami
    deploy:
      replicas: 30
    ports:
      - "8000:8000"

setup.sh

#!/bin/bash

# Only once to setup Google Cloud Project and local env
# gcloud projects create "${GCP_PROJECT_ID}"
# gcloud auth application-default login
# gcloud services enable compute.googleapis.com 
# gcloud services enable cloudbilling.googleapis.com
# GCP_BILLING_ACCOUNT=`gcloud alpha billing accounts list --format=json| jq '.[0].name' -r`
# gcloud alpha billing projects link ${GCP_PROJECT_ID} --billing-account=${BILLING_ACCOUNT}


GCP_PROJECT_ID=docker-experiments-2018-12
GCP_REGION_ID=europe-west3
GCP_ZONE_ID=europe-west3-a

gcloud config set project "${GCP_PROJECT_ID}"
gcloud compute project-info add-metadata \
    --metadata google-compute-default-region=${GCP_REGION_ID}
gcloud compute project-info add-metadata \
    --metadata google-compute-default-zone=${GCP_ZONE_ID}

GCP_IMAGE_URL=`gcloud compute images list --uri | grep ubuntu-1804`

docker-machine create \
    --driver google \
    --google-project ${GCP_PROJECT_ID} \
    --google-machine-type n1-standard-1 \
    --google-machine-image "${GCP_IMAGE_URL}" \
    --google-zone ${GCP_ZONE_ID} \
    --google-tags docker \
    swarm-manager-1

for m in swarm-worker-{1,2,3,4,5}; do
    docker-machine create \
        --driver google \
        --google-project ${GCP_PROJECT_ID} \
        --google-machine-type f1-micro \
        --google-machine-image "${GCP_IMAGE_URL}" \
        --google-zone ${GCP_ZONE_ID} \
        --google-tags docker \
        $m
done

MANAGER_IP=`gcloud compute instances describe \
    --project ${GCP_PROJECT_ID} \
    --zone ${GCP_ZONE_ID} \
    --format 'value(networkInterfaces[0].networkIP)' \
    swarm-manager-1`

echo "Manager IP is: ${MANAGER_IP}"

docker-machine ssh swarm-manager-1 \
    sudo docker swarm init --advertise-addr ${MANAGER_IP}

WORKER_TOKEN=`docker-machine ssh swarm-manager-1 \
    sudo docker swarm join-token worker | grep token | awk '{ print $5 }'`

for m in swarm-worker-{1,2,3,4,5}; do
    docker-machine ssh $m \
        sudo docker swarm join --token $WORKER_TOKEN ${MANAGER_IP}:2377
done

gcloud compute firewall-rules create docker-public-ports \
  --project=${GCP_PROJECT_ID} \
  --description="Allow Docker Stack Sample App Ports" \
  --direction=INGRESS \
  --priority=1000 \
  --network=default \
  --action=ALLOW \
  --rules=tcp:80,tcp:8080,tcp:3000,tcp:8000 \
  --target-tags=docker

utils.sh

#!/bin/bash

# Aktywuje, aby lokalny docker używał zdalnego deamona dockera
eval "$(docker-machine env swarm-manager-1)"

# Deploy
docker stack deploy -c docker-compose.yml sample-app
# Lista aplikacji
docker stack ls
# Lista procesow w aplikacji
docker stack ps sample-app

# Lista maszyn
docker-machine ls
# Lista maszyn - same nazwy
docker-machine ls --format '{{ .Name }}'
# Kasowanie maszyn
docker-machine rm $(docker-machine ls --format '{{.Name}}')

# Resetowanie 
gcloud compute instances list --format="value(name)" | xargs gcloud compute instances reset --zone europe-west3-a
# Resetowanie workerów
gcloud compute instances list --format="value(name)" | grep worker | xargs gcloud compute instances reset --zone europe-west3-a