Mati365 / nomad-cheap-cluster

Cheap Nomad + Vault + Consul + Pulumi + Traefik + Ansible IaC cloud cluster live example

cheap-cloud

This repo is an example of low-cost cloud infrastructure, with the entire cost of maintenance settling around $10 per month. The project uses the "infrastructure as a code" methodology for doing deployments and allows you to deploy Node based applications with dynamic staging environments.

Default preinstalled software:

• Nomad
• Consul
• Vault
• Ansible
• Vagrant
• Pulumi
• Docker
• Redis
• ElasticSearch 7.x
• Postgresql
• Traefik
• Node
• Docker registry

Example application that is connected to this cloud:

https://github.com/Mati365/upolujksiazke.pl

check jobs/ folder with Nomad tasks / services.

Architecture

graph TD
    subgraph "Server (192.168.56.10)"
        A[Nomad server] -.-> B
        B[Consul server]
    end

    B --> C
    B --> E

    subgraph "Client 1 (192.168.56.11)"
        C[Nomad client] -.-> D
        D[Consul agent]
    end

    subgraph "Client X (192.168.56.X)"
        E[Nomad client] -.-> F
        F[Consul agent]
    end

Local testing

Generate ansible RSA key in ansible/keys/ansible/ and then:

./start-dev.sh --create-vm

Useful commands

Nomad

List server members:

sudo nomad server members \
  -address=https://localhost:4646 \
  -ca-path=/var/www/nomad/tls/nomad-ca.pem \
  -client-cert=/var/www/nomad/tls/server.pem \
  -client-key=/var/www/nomad/tls/server-key.pem \
  -token=$(jq -r '.SecretID' /var/www/nomad/server/bootstrap.json)

List node members:

sudo nomad node status \
  -address=https://localhost:4646 \
  -ca-path=/var/www/nomad/tls/nomad-ca.pem \
  -client-cert=/var/www/nomad/tls/server.pem \
  -client-key=/var/www/nomad/tls/server-key.pem \
  -token=$(jq -r '.SecretID' /var/www/nomad/server/bootstrap.json)

Purge job:

sudo nomad job stop -purge \
  -address=https://localhost:4646 \
  -ca-path=/var/www/nomad/tls/nomad-ca.pem \
  -client-cert=/var/www/nomad/tls/server.pem \
  -client-key=/var/www/nomad/tls/server-key.pem \
  -token=$(jq -r '.SecretID' /var/www/nomad/server/bootstrap.json) \
  <job name>

Fail deployment:

sudo nomad deployment fail \
  -address=https://localhost:4646 \
  -ca-path=/var/www/nomad/tls/nomad-ca.pem \
  -client-cert=/var/www/nomad/tls/server.pem \
  -client-key=/var/www/nomad/tls/server-key.pem \
  -token=$(jq -r '.SecretID' /var/www/nomad/server/bootstrap.json) \
  <deployment id>

Take vault snapshot:

VAULT_TOKEN=<token> vault operator raft snapshot save -tls-skip-verify ./snapshot.snap

Consul

consul members -token=$(cat /var/www/consul/tokens/bootstrap.key)

License

MIT License

Copyright (c) 2022 Mateusz Bagiński

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.