User talk:Jch/consul

Consul

Introduction

This page is currently my experimental log about consul on AL.

Downloaded package: consul-0.5.0-r0.apk from http://repos.mauras.ch/alpinelinux/x86_64/

Will prepare 5 KVM: 3 consul server (in run-from-ram mode) and 2 consul agent (a SAN (NBD) and a LXC host in data mode) on an isolated network.

We will experiment to find the right spec to allocate the consul servers for 100 to 1000 agents.

We plan to orchestrate our VM fleet based on consul events, envconsul and consul-template. All with ash scripts and smart setup.

Install

As we start from scratch and want to have an isolated network to run our tests, this topic is also an introduction to our new architecture for the cluster (the cloud).

The 5 machines defined to start our tests will be designed as a virtual cluster and bootstraped as it was a real cluster...
from a virtual laptop booting from a virtual USB stick.
This first "machine zero" to bootstrap the first PXE server, then to start 2nd and 3rd PXEservers.
Then to start a SAN.
Then to start a KVM-repo.
Then to reboot all KVM-PXE or at least adapt there config to use new repo.
Then to start a LXC host.
(then to start services and other KVM)

We will just focus on the consul installation and configuration parts.

consul server

apk add consul

consul agent

apk add consul

Usage

Machines discovery

List machines = list members

list PXEservers = list servers

whois active.PXEservers = get leader

Services discoevry

Register service

List services

Key/Value storage

k/v