suarm

Tools for deploy a cheap Docker Swarm cluster in https://vultr.com servers over CoreOS With a loadbalancer

Installation

[sudo] pip install git+https://github.com/vicobits/suarm.git

development

• Install build essential tools with sudo apt install build-essential
• Prepare environment with make env
• Configure swarm.json file.
• Edit files

Usage

Create Cluster

• Add api-key to swarm.json from value generated in API Section in your Vultr account.
• Generate a ssh-key for your project with the command suarm keys --create.
• Register your generated ssh-key into swarm.json file with selecting between your registered keys with suarm keys
• Create a cluster with suarm cluster --create or suarm -f <config_file> cluster --create

Destroy Cluster

• Destroy cluster with suarm cluster --delete or suarm -f <config_file> cluster --delete

Configuration file

By defaul suarm catch swarm.json file as configuration file in the current location this file, contains the next values:

{
    "api-key": "<MY_VULTR_API_KEY>",
    "ssh-key": "<MY_VULTR_GENERATED_SSHKEYID>",
    "label": "<NAME_FOR_SWARM>",
    "path": "<PATH_FOR_DEPLOYMENTS>",
    "domain": "<DOMAIN_FOR_SWARM_MASTER>",
    "email": "<YOUR_EMAIL>",
    "manager": {
        "replicas": 1,
        "zone": "NEW_JERSEY",
        "plan": 201,
        "os": "COREOS",
        "nodes": []
    },
    "worker": {
        "replicas": 2,
        "zone": "NEW_JERSEY",
        "plan": 201,
        "os": "COREOS",
        "nodes": []
    }
}

Where

• api-key is obtained from the api
• ssh-key is a SSHKEYID of some your registered ssh keys in the server this is obtained from
• ssh-key is path string for apps deployed with docker compose.
• manager is config for manager nodes
• worker is config for worker nodes
• label Is a name for cluster e.g. swarm > swarm-manager, swarm-worker00, swarm-worker01, ...
• replicas is the quantity of nodes
• zone is a availability zone obtained from the api supported zones are:

NEW_JERSEY      CHICAGO           DALLAS          SILICON_VALLEY
SEATTLE         LOS_ANGELES       ATLANTA         SYDNEY
AMSTERDAM       LONDON            FRANKFURT       SINGAPORE
PARIS           TOKYO             MIAMI

• plan representa resources for server (Mem/CPU/Price), obtained from the api List for common plans are:

PLAN     MEMORY RAM        STORAGE        BANDWIDTH       CPU         PRICE
-------------------------------------------------------------------------------
201      1024 MB RAM      25 GB SSD       1.00 TB BW      1CPU        5 USD
202      2048 MB RAM      40 GB SSD       2.00 TB BW      1CPU        10 USD
203      4096 MB RAM      60 GB SSD       3.00 TB BW      2CPUs       20 USD
204      8192 MB RAM      100 GB SSD      4.00 TB BW      4CPUs       40 USD
205      16384 MB RAM     200 GB SSD      5.00 TB BW      6CPUs       80 USD
206      32768 MB RAM     300 GB SSD      6.00 TB BW      8CPUs       160 USD
207      65536 MB RAM     400 GB SSD      10.00 TB BW     16CPUs      320 USD
208      98304 MB RAM     800 GB SSD      15.00 TB BW     24 CPUs     640 USD

• os is OS id in Vultr obtained from the API List for supported OS are:

CENTOS_6        DEBIAN_7      UBUNTU_14_04      COREOS      DEBIAN_8,
UBUNTU_16_04    FEDORA_25     UBUNTU_17_04      DEBIAN_9    FEDORA_26

Configure cluster

Setup swarm

Use the command suarm cluster --setup to configure manager and worker nodes.

Setup dashboard

Use the command suarm cluster --setup-dashboard to install portainer and vizualizer.

Setup proxy

Use the command suarm cluster --setup-proxy to install proxy flow base on DockerFlow.

Setup cluster manually

For setup cluster manually check Manually docs

##Execute commands in production

docker exec -ti [container] python manage.py createsuperuser

Performance improvement

To improve performance between nodes in the cluster there should be in the same private network. You can configure a private network.

• First enable the private network feature in all nodes
• Create a file /etc/systemd/network/static.network with the next configuration:

[Match]
Name=eth1

[Link]
MTUBytes=1450

[Network]
Address=10.99.0.10
Netmask=255.255.0.0

• Restart networking config sudo systemctl restart systemd-networkd

TODOS

• manage domains add domain to the cluster and manage app domains with Cloudflare
• deploy app app deployment with docker-compose

Extra Config

For proxy config options check dockerflow-proxy For letsencrypt config options check dockerflow-le

License

This code is licensed under the MIT License_.

.. _MIT License: https://github.com/vicobits/suarm/blob/master/LICENSE