Hybrid (Windows+Linux) Docker Swarm

Hybrid (Windows+Linux) Docker Swarm

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*** Pre-requisites ***
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1. Set up Windows 2016 password:
gcloud beta compute --project <project_id> reset-windows-password <instance_name> --zone <zone_name>
ip_address: <ip_address>
password: <defult_password_generated>
username: <username>

3. Installing Docker:
https://store.docker.com/editions/enterprise/docker-ee-server-windows
https://store.docker.com/editions/community/docker-ce-server-centos
https://store.docker.com/editions/community/docker-ce-server-ubuntu

3. Setup firewall rules in GCP (VPC Network --> Firewall Rules):
TCP port 2376 for secure Docker client communication.
TCP port 2377 for communication between the nodes of a Docker Swarm or cluster (only on manager nodes)
TCP and UDP port 7946 for communication among nodes.
UDP port 4789 for overlay network traffic.


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*** Commands ***
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1. Setting up manager:
docker swarm init --advertise-addr 10.140.0.3 --listen-addr 10.140.0.3:2377

2. Joining the workers:
docker swarm join --token <token_id> 10.140.0.3:2377

3. Check for status:
docker node ls

4. Apply labels for easy id/deployment:
docker node update --label-add os=windows manager
docker node update --label-add os=windows worker1
docker node update --label-add os=linux worker2

5. Verify the labels:
docker node inspect manager | findstr 'os'
docker node inspect worker3 | findstr 'os'

6. Check the N/W types:
docker network ls

7. Create an application overlay N/W:
docker network create -d overlay meetupnet

8. Create a "db" service for Windows nodes:
docker service create --name db --network meetupnet --constraint 'node.labels.os==windows' --endpoint-mode dnsrr redis:3.2.100-nanoserver

9. Create a "web" service for Linux nodes:
docker service create --name web --network meetupnet --constraint 'node.labels.os==linux' --publish 80:80 radumatei/python-web

10. Scaling the "db" service:
docker service scale db=3
docker service ls
docker service ps db

11. Add a Linux worker node and promote to manager:
docker swarm join --token <token_id> 10.140.0.3:2377
docker node update --label-add os=linux worker3
docker node promote worker3

12. Scaling the "web" Service:
docker service scale web=3
docker service ls
docker service ps web

13. Configure nginx.conf with IP addresses of Docker host machines

14. Build custom Docker images:
cat Dockerfile
docker build . -t nginx:meetupdemo
docker images

15. Run the new nginx image:
docker run -p 80:80 -d nginx:meetupdemo
docker ps


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*** External References ***
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1. Up-to-date info/changes of Docker on Windows - https://docs.microsoft.com/en-us/virtualization/windowscontainers/manage-containers/swarm-mode
2. Use Docker Swarm to run a Windows+Linux containerized application - https://www.youtube.com/watch?v=ZfMV5JmkWCY
3. Hybrid Docker Swarm cluster with multi-os deployment - http://collabnix.com/building-hybrid-docker-swarm-mode-cluster-on-google-cloud-platform/