dockerswarm.rocks | Docker Swarm mode rocks | Continuous Deployment library
kandi X-RAY | dockerswarm.rocks Summary
kandi X-RAY | dockerswarm.rocks Summary
Docker is a great tool (the "de facto" standard) to build Linux containers. Docker Compose is great to develop locally with Docker, in a replicable way. Docker Swarm Mode is great to deploy your application stacks to production, in a distributed cluster, using the same files used by Docker Compose locally.
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Community Discussions
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QUESTION
I have init a swarm with 1 manager and 1 worker, each on a different hosts, following the official tutorial. I also use Traefik, following these instructions on dockerswarm.rocks, using simply overlay network created with:
...ANSWER
Answered 2020-Dec-09 at 16:54So the problem was with my firewall (iptables) messing around with the rules set by Docker. I indeed need to implement my own rules (launched at reboots), and Docker has to set its internal communication rules (set everytime the docker daemon restarts).
I'm not a connoisseur of iptables, I just got one supposed to deal well with Docker Swarm, but one line was missing in it:
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Install dockerswarm.rocks
Create a new remote VPS ("virtual private server").
Deploy the latest Ubuntu LTS ("long term support") version. At the time of this writing it's Ubuntu 18.04.
Connect to it via SSH, e.g.:
Define a server name using a subdomain of a domain you own, for example dog.example.com.
Make sure the subdomain DNS records point to your VPS's IP address.
Create a temporal environment variable with the name of the host to be used later, e.g.:
Set up the server hostname:
Update packages:
Install Docker following the official guide...
...or alternatively, run the official convenience script:
If you are setting up multiple nodes (servers/VPSs), repeat these steps for each one. Make sure you use a different domain/subdomain for each node.
In Docker Swarm Mode you have one or more "manager" nodes and one or more "worker" nodes (that can be the same manager nodes). The first step is to configure one (or more) manager nodes.
On the main manager node, run:
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