Lightning talk from the OpenStack NYC meetup on October 8, 2014. http://bit.ly/ibm-os-meetup By Mike Spreitzer Heat is an OpenStack service that allows model based management of virtual infrastructure and software. We'll introduce Heat and show its use to manage Dockers containers with high availability. [10/14 update: Addresses this bug: https://review.openstack.org/#/c/127821/] The content of this talk is a statement from the IBM Research division, not IBM product divisions, and is not a statement from IBM regarding its plans, directions or product intents. Any activities described by this talk are subject to change.

1. Containers
and
Heat
and
Health
Maintenance
Mike
Spreitzer
IBM
Research

2. The
Take-­‐Away
• You
can
use
Docker
through
Nova
• Heat
provides
desired-­‐state
based
management
• OpenStack
can
do
health
maintenance
today

3. Docker
and
Nova
• There
is
a
“Docker
driver”
for
Nova
• Allows
you
to
create/manage
Docker
containers
through
the
normal
API
for
VMs
• Special
images

4. Heat
• A
“template”
is
a
model:
desired
state
– Has
inputs
(“parameters”)
and
outputs
– Has
resources
• Most
correspond
to
an
object
in
an
OpenStack
API
• Some
are
synthePc
things
– E.g.,
autoscaling
group
• Each
has
inputs
(“properPes”)
and
outputs
(“aTributes”)
• A
“stack”
is
an
instance
of
a
template
– Yes,
recursion
allowed
• Heat
allows
CRUD
of
stacks
from
templates

5. The
Picture
of
Health
OS::Neutron::LoadBalancer
OS::Neutron::Pool
OS::Nova::Server
OS::Heat::HARestarter
OS::Neutron::PoolMember
OS::Ceilometer::Alarm
OS::Neutron::HealthMonitor

6. Template
for
a
Container
with
Health
Maintenance,
p1
heat_template_version: 2013-05-23!
description: A container subject to health maintenance!
parameters:!
image:!
type: string!
description: Image used for containers!
flavor:!
type: string!
description: flavor used by the containers!
default: m1.tiny!

7. Template
for
a
Container
with
Health
Maintenance,
p2
private_network:!
type: string!
description:!
Name or ID of the network to which!
the container will be attached!
protocol_port:!
type: number!
description: port number where container listens!
default: 80!
pool_id:!
type: string!
description: LB Pool of which to be a member!

8. Template
for
a
Container
with
Health
Maintenance,
p3
resources:!
server:!
type: OS::Nova::Server!
properties:!
flavor: {get_param: flavor}!
image: {get_param: image}!
networks:!
- {network: {get_param: private_network}}!
!
restarter:!
type: OS::Heat::HARestarter!
properties:!
InstanceId: {get_resource: server}!

9. Template
for
a
Container
with
Health
Maintenance,
p4
member:!
type: OS::Neutron::PoolMember!
properties:!
pool_id: {get_param: pool_id}!
address: {get_attr: [server, first_address]}!
protocol_port: {get_param: protocol_port}!

10. Template
for
a
Container
with
Health
Maintenance,
p5
(old
version)
gone_alarm:!
type: OS::Ceilometer::Alarm!
properties:!
description: Detect container being unresponsive!
meter_name: network.services.lb.member!
statistic: avg!
period: 70!
evaluation_periods: 2!
threshold: 1!
alarm_actions: [ {get_attr:!
[restarter, AlarmUrl]} ]!
matching_metadata: {resource:!
{get_resource: member} }!
comparison_operator: lt!

11. Template
for
a
Container
with
Health
Maintenance,
p5
(new
version)
gone_alarm:!
type: OS::Ceilometer::Alarm!
properties:!
description: Detect container being unresponsive!
meter_name: network.services.lb.member!
statistic: avg!
period: 70!
evaluation_periods: 2!
threshold: 1!
alarm_actions: [ {get_attr:!
[restarter, AlarmUrl]} ]!
query: {field: resource_id, op: eq,!
value: {get_resource: member} }!
comparison_operator: lt!

12. Template
for
a
Container
with
Health
Maintenance,
p6
outputs:!
ceilometer_query:!
value:!
str_replace:!
template:!
ceilometer statistics!
-m network.services.lb.member!
-q resource_id=memberid -p 70 -a avg!
params:!
memberid: {get_resource: member}!
description:!
This is a Ceilometer CLI command that produces!
stats similar to those used by the alarm!

13. Template
for
a
Container
with
Health
Maintenance,
p7
restart_url:!
value: {get_attr: [restarter, AlarmUrl]}!
description: the webhook for the HARestarter!
!

14. Also
Talk
to
Me
About
• PaaS
and
IaaS
for
Containers
• Balancing
an
ASG
across
AZs
• HolisPc
placement
in
OpenStack