Setup Docker Swarm in Ubuntu

Ok let me drop down what i did here to setup this docker swarm without repeating since i have been very indecisive on whether to deploy multi-host docker swarm or just single location with fail over between multiple machines. In the end, i stick with single region and expand from here if needed.

Machines Setup

Installing Dockers

throw these in each machine

sudo apt-get install     apt-transport-https     ca-certificates     curl     software-properties-common -y
curl -fsSL | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88
sudo add-apt-repository    "deb [arch=amd64] \
$(lsb_release -cs) \
sudo apt-get update
sudo apt-get install docker-ce -y

doing this gives us the latest docker setup

Installing Docker Swarm

Now i need to setup docker swarm, its pretty straight forward with the following command on the master machine

docker swarm init --advertise-addr

then on other worker machine do the following to add them into swarm,

docker swarm join --token secret-token

replace your secret-token with the real deal. Now i'm gonna secret our network a bit with overlay with the name overnet

docker network create  --opt encrypted --driver overlay --attachable overnet

this doesn't make you feel any differences but it creates an overlay network between each node in the swarm.

Installing reverse proxy for docker swarm

now i need to create a reverse proxy for my docker swarm since i wants to do a lot with it.

docker service create \
--name traefik \
--constraint=node.role==manager \
--publish 80:80 \
--publish 8080:8080 \
--mount type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock \
--network overnet\
traefik:latest \
--docker \
--docker.swarmmode \
--docker.domain=traefik \ \

for more information on this, you can visit traefik web page for more information on its configuration.

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