openstack/cookbook-openstack-network
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Add high availability tool for neutron networking

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* Setup optional cron jobs to call the tool in order to find
offline l3 agents and migrate them to another online agent
* Supports a rebalance feature to shuffle tenants around
given the scheduler for neutron is very simplistic right now
* Supports rebalancing DHCP configuration to all DHCP agents

Change-Id: Iaf0686c2fa93ec1dcdd644b75cb3b4528d4cabf0
This commit is contained in:
Alan Meadows
2013-07-29 08:04:01 -07:00
parent a45270f9fe
commit 3c97dc59f5
4 changed files with 444 additions and 3 deletions
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19
recipes/server.rb
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@@ -43,3 +43,22 @@ service "quantum-server" do
supports :status => true, :restart => true
action :enable
end
if node["openstack"]["network"]["quantum_ha_cmd_cron"]
# ensure period checks are offset between multiple l3 agent nodes
# and assumes splay will remain constant (i.e. based on hostname)
# Generate a uniformly distributed unique number to sleep.
checksum = Digest::MD5.hexdigest(node['fqdn'] || 'unknown-hostname')
splay = node['chef_client']['splay'].to_i || 3000
sleep_time = checksum.to_s.hex % splay
cron "quantum-ha-healthcheck" do
minute node["openstack"]["network"]["cron_l3_healthcheck"]
command "sleep #{sleep_time} ; . /root/openrc && #{node["openstack"]["network"]["quantum_ha_cmd"]} --l3-agent-migrate"
end
cron "quantum-ha-replicate-dhcp" do
minute node["openstack"]["network"]["cron_replicate_dhcp"]
command "sleep #{sleep_time} ; . /root/openrc && #{node["openstack"]["network"]["quantum_ha_cmd"]} --replicate-dhcp"
end
end