Automate creating overlays

[YanChii]

This is proposal of a script that will automate overlay creation on compute nodes using ansible.

Script name: /opt/erigones/bin/esdc-overlay

Usage:
esdc-overlay create <overlay_name> <node_list|all> [type]

Example:
esdc-overlay create myoverlay1 all
esdc-overlay create myoverlay1 cn01.local,cn02.local,cn03.local

What it will do:

• verify parameters
  • overlay name cannot have a trailing number
  • check node names (against ansible's hosts file)
  • supported overlay type (files or direct)
  • verify node config (presence of external IP)
• execute ansible tasks over all selected nodes
  • add IPSec rules
  • add firewall rules (to allow this overlay connect among selected nodes)
  • add overlay into config file
  • add overlay into /var/run/smartdc/networking/overlay_rules.json (refresh net-virtual)
  • refresh stored node info using DC API (continue if failed)
  • update cfgdb settings

The create command can be run multiple times to ensure the overlay is correctly setup. If the overlay already exists on a node, nothing will happen.

Other commands:
esdc-overlay delete <overlay_name>
esdc-overlay list

The list command prints all overlays with nodes assigned to them.

J.

[YanChii]

Add command:
esdc-overlay update [overlay-rule-name] [node-list]
Checks and updates overlay & IPSec configuration on all involved nodes. Useful when a new node is added. When run without a overlay-rule-name, it updates configuration of all overlays on all nodes.

Overlays configuration is queried from cfgdb:
/esdc/settings/overlays/{{ overlay rule name }}/nodelist (csv or "all")
/esdc/settings/overlays/{{ overlay rule name }}/rule (configuration string)