How to test Heat (by quqi99)

作者：张华  发表于：2015-12-19
版权声明：能够随意转载。转载时请务必以超链接形式标明文章原始出处和作者信息及本版权声明

(http://blog.csdn.net/quqi99 )

Heat依据配置文件模板(HOT, heat orchestration template)实例化一组符合要求的虚机。也能够在其上相应用软件进行配置与编排。对支持对一个组件部署后的负载均衡进行编排。
Heat 服务包括以下重要的组件：

• Heat-api组件实现OpenStack天然支持的REST API。该组件通过把API请求经由AMQP传送给Heat engine来处理API请求。
• Heat-api-cfn组件提供兼容AWS CloudFormation的API。同一时候也会把API请求通过AMQP转发给heat engine。

• Heat-engine组件提供Heat最基本的协作功能。

Setting up test environment

# bzr branch lp:~openstack-charm-testers/+junk/ipv6

bzr branch lp:openstack-charm-testing
juju destroy-environment --force zhhuabj
juju switch zhhuabj && juju bootstrap
juju-deployer -c ./next.yaml -d trusty-kilo
juju add-unit neutron-gateway
#juju set neutron-api overlay-network-type=vxlan
#juju set neutron-api l2-population=false enable-l3ha=true
./configure   #edit script to use vxlan
source ./novarc
neutron net-list && neutron router-list
nova boot --image trusty --nic net-id=98e10e32-13eb-48ee-b265-4ae0e449b6e5 --flavor 2 i1
nova secgroup-add-rule default icmp -1 -1 0.0.0.0/0
nova secgroup-add-rule default tcp 22 22 0.0.0.0/0
nova floating-ip-create
nova floating-ip-associate i1 10.5.150.1

或者使用devstack部署。localrc文件例如以下：

#OFFLINE=True
DEST=/home/demo
IPSEC_PACKAGE=strongswan
sudo route del -net 10.0.1.0/24 gw 192.168.101.3
sudo apt-get install openvswitch-switch qemu-kvm libvirt-bin
sudo ovs-vsctl -- --may-exist add-br br-phy
sleep 5

sudo ip addr add 172.16.1.1/24 dev br-phy
#sudo ovs-vsctl -- --may-exist add-port br-phy eth0 -- set interface eth0 type=internal
ENABLED_SERVICES=rabbit,mysql,key,g-api,g-reg
ENABLED_SERVICES+=,n-api,n-crt,n-obj,n-cpu,n-cond,n-sch
#ENABLED_SERVICES+=,cinder,c-api,c-vol,c-sch
ENABLED_SERVICES+=,q-svc,q-agt,q-dhcp,q-l3,q-meta,neutron,q-lbaas,q-fwaas,q-vpn

Q_ML2_TENANT_NETWORK_TYPE=flat,vlan,gre,vxlan
OVS_BRIDGE_MAPPINGS=physnet1:br-phy

#ENABLED_SERVICES+=,horizon
#ENABLED_SERVICES+=,s-proxy,s-object,s-container,s-account
VOLUME_BACKING_FILE_SIZE=500M
SWIFT_HASH=66a3d6b56c1f479c8b4e70ab5c2000f5
SWIFT_REPLICAS=1
SWIFT_DATA_DIR=/home/demo/data/swift

HOST_IP=172.16.1.1
SERVICE_HOST=172.16.1.1
MYSQL_HOST=172.16.1.1
RABBIT_HOST=172.16.1.1
GLANCE_HOSTPORT=172.16.1.1:9292
Q_HOST=172.16.1.1

FIXED_RANGE=10.0.1.0/24
FLOATING_RANGE=192.168.101.0/24
Q_FLOATING_ALLOCATION_POOL=start=192.168.101.3,end=192.168.101.100
PUBLIC_NETWORK_GATEWAY=192.168.101.1
NETWORK_GATEWAY=10.0.1.1
PUBLIC_BRIDGE=br-ex
# sudo ovs-vsctl add-port br-ex eth1
OVS_PHYSICAL_BRIDGE=br-phy

DATABASE_USER=root
DATABASE_PASSWORD=password
ADMIN_PASSWORD=password
SERVICE_PASSWORD=password
RABBIT_PASSWORD=password
SERVICE_TOKEN=ADMIN
LOGFILE=/home/demo/logs/stack.log
ENABLE_DEBUG_LOG_LEVEL=False
SYSLOG=False
SCREEN_LOGDIR=/home/demo/logs
LOG_COLOR=False
Q_USE_DEBUG_COMMAND=False
APACHE_ENABLED_SERVICES+=keystone
KEYSTONE_TOKEN_FORMAT=UUID
USE_SSL=False
disable_service tls-proxy

ENABLED_SERVICES+=,heat,h-api,h-api-cfn,h-api-cw,h-eng
CIRROS_VERSION=0.3.4

使用Heat进行部署

heat_template_version: 2013-05-23

description: HOT template for two interconnected VMs with floating ips.

parameters:
  image_id:
    type: string
    description: Image Name

  secgroup_id:
    type: string
    description : Id of the security groupe

  public_net:
    type: string
    description: public network id

resources:
  private_net:
    type: OS::Neutron::Net
    properties:
      name: private-net

  private_subnet:
    type: OS::Neutron::Subnet
    properties:
      network_id: { get_resource: private_net }
      cidr: 172.16.2.0/24
      gateway_ip: 172.16.2.1

  router1:
    type: OS::Neutron::Router
    properties:
      external_gateway_info:
        network: { get_param: public_net }

  router1_interface:
    type: OS::Neutron::RouterInterface
    properties:
      router_id: { get_resource: router1 }
      subnet_id: { get_resource: private_subnet }

  server1_port:
    type: OS::Neutron::Port
    properties:
      network_id: { get_resource: private_net }
      security_groups: [ get_param: secgroup_id ]
      fixed_ips:
        - subnet_id: { get_resource: private_subnet }

  server1_floating_ip:
    type: OS::Neutron::FloatingIP
    properties:
      floating_network_id: { get_param: public_net }
      port_id: { get_resource: server1_port }

  server1:
    type: OS::Nova::Server
    properties:
      name: Server1
      image: { get_param: image_id }
      flavor: m1.tiny
      networks:
        - port: { get_resource: server1_port }

  server2_port:
    type: OS::Neutron::Port
    properties:
      network_id: { get_resource: private_net }
      security_groups: [ get_param: secgroup_id ]
      fixed_ips:
        - subnet_id: { get_resource: private_subnet }

  server2_floating_ip:
    type: OS::Neutron::FloatingIP
    properties:
      floating_network_id: { get_param: public_net }
      port_id: { get_resource: server2_port }

  server2:
    type: OS::Nova::Server
    properties:
      name: Server2
      image: { get_param: image_id }
      flavor: m1.tiny
      networks:
        - port: { get_resource: server2_port }

outputs:
  server1_private_ip:
    description: Private IP address of server1
    value: { get_attr: [ server1, first_address ] }
  server1_public_ip:
    description: Floating IP address of server1
    value: { get_attr: [ server1_floating_ip, floating_ip_address ] }
  server2_private_ip:
    description: Private IP address of server2
    value: { get_attr: [ server2, first_address ] }
  server2_public_ip:
    description: Floating IP address of server2
    value: { get_attr: [ server2_floating_ip, floating_ip_address ] }

这个ymal文件。大概是须要完毕以下的工作

1. 创建一个私有网络
2. 创建一个路由器
3. 连接好外部网络和内部网络
4. 创建两个虚拟机，绑定floating ip

Heat眼下支持两种格式的模板。一种是基于JSON格式的CFN模板；第二种是基于YAML格式的HOT模板。CFN模板主要是为了保持对AWS的兼容性。HOT模板是Heat自有的。资源类型更加丰富。更能体现出Heat特点的模板。一个典型的 HOT 模板由下列元素构成：

• 模板版本号：必填字段，指定所相应的模板版本号，Heat 会依据版本号进行检验。

• 參数列表：选填，指输入參数列表。
• 资源列表：必填，指生成的 Stack 所包括的各种资源。能够定义资源间的依赖关系，比方说生成Port。然后再用port来生成VM。
• 输出列表：选填，指生成的 Stack 暴露出来的信息，能够用来给用户使用。也能够用来作为输入提供给其他的 Stack。

NET_ID=$(nova net-list | awk '/ ext_net / { print $2 }')
SEC_ID=$(nova secgroup-list | awk '/ default / { print $2 }')
heat stack-create -f first-stack.yml -P image_id=cirros -P public_net=$NET_ID -P secgroup_id=$SEC_ID First_Stack

ubuntu@zhhuabj-bastion:~/openstack-charm-testing$ heat stack-list
+--------------------------------------+-------------+-----------------+----------------------+
| id                                   | stack_name  | stack_status    | creation_time        |
+--------------------------------------+-------------+-----------------+----------------------+
| b36bdf67-bd59-401d-ab3b-f7437aa06c30 | First_Stack | CREATE_COMPLETE | 2015-12-19T10:18:49Z |
+--------------------------------------+-------------+-----------------+----------------------+

ubuntu@zhhuabj-bastion:~/openstack-charm-testing$ nova list
+--------------------------------------+---------+--------+------------+-------------+------------------------------------+
| ID                                   | Name    | Status | Task State | Power State | Networks                           |
+--------------------------------------+---------+--------+------------+-------------+------------------------------------+
| 901d5365-01b6-4254-a65f-5177d804d074 | Server1 | ACTIVE | -          | Running     | private-net=172.16.2.3, 10.5.150.4 |
| f1441f2d-4fb2-4560-b0ff-85d0cde4bc45 | Server2 | ACTIVE | -          | Running     | private-net=172.16.2.4, 10.5.150.3 |

ubuntu@juju-zhhuabj-machine-7:~$ ps -ef|grep heat
root      3656     1  0 Dec08 ?        00:05:40 /var/lib/juju/tools/unit-heat-0/jujud unit --data-dir /var/lib/juju --unit-name heat/0 --debug
heat     20395     1  0 Dec08 ?        00:00:10 /usr/bin/python /usr/bin/heat-api --config-file=/etc/heat/heat.conf --log-file=/var/log/heat/heat-api.log
heat     20414     1  0 Dec08 ?        00:00:10 /usr/bin/python /usr/bin/heat-api-cfn --config-file=/etc/heat/heat.conf --log-file=/var/log/heat/heat-api-cfn.log
heat     20437     1  0 Dec08 ?        00:19:54 /usr/bin/python /usr/bin/heat-engine --config-file=/etc/heat/heat.conf --log-file=/var/log/heat/heat-engine.log

Heat也能对软件进行配置和部署的编排

Heat 提供了多种资源类型来支持对于软件配置和部署的编排，例如以下所列：

• OS::Heat::CloudConfig： VM引导程序启动时的配置。由 OS::Nova::Server 引用
• OS::Heat::SoftwareConfig：描写叙述软件配置
• OS::Heat::SoftwareDeployment：运行软件部署
• OS::Heat::SoftwareDeploymentGroup：对一组 VM 运行软件部署
• OS::Heat::SoftwareComponent：针对软件的不同生命周期部分。相应描写叙述软件配置
• OS::Heat::StructuredConfig：和 OS::Heat::SoftwareConfig 相似。可是用 Map 来表述配置
• OS::Heat::StructuredDeployment：运行 OS::Heat::StructuredConfig 相应的配置
• OS::Heat::StructuredDeploymentsGroup：对一组 VM 运行 OS::Heat::StructuredConfig 相应的配置

Heat 对负载均衡的编排

负载均衡也是一个非常高级应用，它也是由一组不同的资源类型来实现的。资源类型包括：

• OS::Neutron::Pool：定义资源池，一般能够由 VM 组成
• OS::Neutron::PoolMember：定义资源池的成员
• OS::Neutron::HealthMonitor：定义健康监视器，依据自定的协议，比方 TCP 来监控资源的状态，并提供给 OS::Neutron::Pool 来调整请求分发
• OS::Neutron::LoadBalancer：关联资源池以定义整个负载均衡。

Heat对资源自己主动伸缩的编排
基础架构的自己主动伸缩是一个非常高级的功能。Heat 提供自己主动伸缩组 OS::Heat::AutoScalingGroup 和伸缩策略 OS::Heat::ScalingPolicy。结合基于 Ceilometer 的 OS::Ceilometer::Alarm 实现了能够依据各种条件，比方负载，进行资源自己主动伸缩的功能。

怎样使用Cirros作为样例镜像

Since cirros images don't currently support multi-part mime user-data, it's necessary to inject the hook script to the image and upload the modified image to glance:

https://github.com/openstack/heat-templates/tree/master/hot/software-config/example-templates/cirros-example
wget http://download.cirros-cloud.net/0.3.2/cirros-0.3.2-x86_64-disk.img
virt-copy-in -a cirros-0.3.2-x86_64-disk.img init.d/heat-deploy-hook /etc/init.d
virt-copy-in -a cirros-0.3.2-x86_64-disk.img rc3.d/S99-heat-deploy-hook /etc/rc3.d
glance image-create --name cirros-0.3.2-sc --disk-format=qcow2 --container-format=bare < cirros-0.3.2-x86_64-disk.img
heat stack-create sc1 -f cirros-hello-world.yaml -P "image=cirros-0.3.2-sc"

或者用cirros 0.3.3：

glance image-create --name "Cirros 0.3.3" --disk-format qcow2 --container-format bare --is-public True --copy http://download.cirros-cloud.net/0.3.3/cirros-0.3.3-x86_64-disk.img
nova flavor-create m1.nano 42 64 0 1

或者在devstack中直接指定cirros的版本号

CIRROS_VERSION=0.3.4

參考

[1] http://docs.openstack.org/developer/heat/template_guide/index.html

[2] http://www.ibm.com/developerworks/cn/cloud/library/1511_zoupx_openstackheat/index.htm

[3] https://github.com/openstack/heat-templates/tree/master/hot/software-config/example-templates/cirros-example