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openstack octavia 是 openstack lbaas的支持的一种后台程序，提供为虚拟机流量的负载均衡。实质是类似于trove，调用 nove 以及neutron的api生成一台安装好haproxy和keepalived软件的虚拟机，并连接到目标网路。octavia共有4个组件 housekeeping,worker,api,health-manager，octavia agent。api作用就不详细说了。worker：主要作用是和nova，neutron等组件通信，用于虚拟机调度以及把对于虚拟机操作的指令下发给octavia agent。housekeeping：查看octavia/controller/housekeeping/house_keeping.py得知其三个功能点：SpareAmphora,DatabaseCleanup,CertRotation。依次是清理虚拟机的池子，清理过期数据库，更新证书。health-manager：检查虚拟机状态，和虚拟机中的octavia agent通信，来更新各个组件的状态。octavia agent 位于虚拟机内部：对下是接受指令操作下层的haproxy软件，对上是和health-manager通信汇报各种情况。可以参考博文http://lingxiankong.github.io/blog/2016/03/30/octavia/?utm_source=tuicool&utm_medium=referral
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写的比我更详细一点
目前官方不提供安装文档。谷歌了下似乎也没人写过具体的安装步骤，只推荐用devstack来进行安装。本人尝试根据devstack的安装脚本总结了下安装octavia的步骤，验证是成功的，不当之处请各位指正。
一 安装
1、创建数据库
MySQL> CREATE DATABASE octavia; mysql> GRANT ALL PRIVILEGES ON octavia.* TO 'octavia'@'localhost' IDENTIFIED BY 'OCTAVIA_DBPASS';mysql> GRANT ALL PRIVILEGES ON octavia.* TO 'octavia'@'%' \ IDENTIFIED BY 'OCTAVIA_DBPASS';
2 创建用户 角色 endpoint
openstack user create --domain default --password-prompt octavia openstack role add --project service --user cinder admin openstack endpoint create octavia public http://10.1.65.58:9876/ --region RegionOne openstack endpoint create octavia admin http://10.1.65.58:9876/ --region RegionOne openstack endpoint create octavia internal http://10.1.65.58:9876/ --region RegionOne
3 安装软件包
yum install openstack-octavia-worker openstack-octavia-api python-octavia openstack-octavia openstack-octavia openstack-octavia
4 导入镜像 镜像是从devstack 生成的系统中导出来的
openstack p_w_picpath create amphora-x64-haproxy --public --container-format=bare --disk-format qcow2
5 创建管理网络，并在主机创建ovs端口，使octavia-worker，octavia-housekeeping，octavia-health-manager能和生成的虚拟机实例通讯
5.1 生成管理网络，网段
openstack network create lb-mgmt-net openstack subnet create --subnet-range 192.168.0.0/24 --allocation-pool start=192.168.0.2,end=192.168.0.200 --network lb-mgmt-net lb-mgmt-subnet
5.2 生成管理端口防火墙规则
5555端口是管理网络，考虑到octavia组件尚不成熟，开启了22端口，镜像本身也是开启了22端口，这点吐槽下trove，同样是不成熟的模块，默认不开启22端口，还得去改源码。
openstack security group create lb-mgmt-sec-grp openstack security group rule create --protocol udp --dst-port 5555 lb-health-mgr-sec-grp openstack security group rule create --protocol tcp --dst-port 22 lb-mgmt-sec-grp
5.3 在管理网络创建一个端口用于连接宿主机中的octavia health_manager
neutron port-create --name octavia-health-manager-standalone-listen-port --security-group lb-health-mgr-sec-grp --device-owner Octavia:health-mgr --binding:host_id=controller lb-mgmt-net
5.4 创建宿主机的ovs端口 并连接至5.1生成的网络
ovs-vsctl --may-exist add-port br-int o-hm0 -- set Interface o-hm0 type=internal -- set Interface o-hm0 external-ids:iface-status=active -- set Interface o-hm0 external-ids:attached-mac=fa:16:3e:6f:9f:9a -- set Interface o-hm0 external-ids:iface-id=457e4953-b2d6-49ee-908b-2991506602b2
其中iface-id 和attached-mac 为 5.3生成的port的 属性
ip link set dev o-hm0 address fa:16:3e:6f:9f:9a
5.5 在宿主机上创建dhcp （为啥不用传统的DNSmasq呢？）
dhclient -v o-hm0 -cf /etc/octavia/dhcp/dhclient.conf
6 配置修改，和其他openstack组件设置差不多
6.1 设置数据库
[database] connection = mysql+pymysql://octavia:OCTAVIA_DBPASS@controller/octavia
6.2 设置消息队列
[oslo_messaging_rabbit] rabbit_host = controller rabbit_userid = openstack rabbit_password = RABBIT_PASS
6.3 设置 keystone的认证信息
[keystone_authtoken] auth_version = 2 admin_password = OCTAVIA_PASS admin_tenant_name = octavia admin_user = octavia auth_uri = http://controller:5000/v2.0
6.4 设置health_manager组件监听地址，此ip地址等于5.3中创建的io地址
[health_manager] bind_port = 5555 bind_ip = 192.168.0.7 controller_ip_port_list = 192.168.0.7:5555
6.5 设置和虚拟机通信的 公钥私钥
[haproxy_amphora] server_ca = /etc/octavia/certs/ca_01.pem client_cert = /etc/octavia/certs/client.pem key_path = /etc/octavia/.ssh/octavia_ssh_key base_path = /var/lib/octavia base_cert_dir = /var/lib/octavia/certs connection_max_retries = 1500 connection_retry_interval = 1
6.6 设置 用于开启虚拟机实例的信息
[controller_worker] amp_boot_network_list = 826be4f4-a23d-4c5c-bff5-7739936fac76 # 步骤5.1中生成的id amp_p_w_picpath_tag = amphora # 步骤4 中已经定义这个metadata amp_secgroup_list = d949202b-ba09-4003-962f-746ae75809f7 # 步骤5.2 生成的安全组id amp_flavor_id = dd49b3d5-4693-4407-a76e-2ca95e00a9ec amp_p_w_picpath_id = b23dda5f-210f-40e6-9c2c-c40e9daa661a #步骤4中生成的镜像id amp_ssh_key_name = 155 # amp_active_wait_sec = 1 amp_active_retries = 100 network_driver = allowed_address_pairs_driver compute_driver = compute_nova_driver amphora_driver = amphora_haproxy_rest_driver
7 修改neutron配置
7.1 修改 /etc/neutron/neutron.conf 增加lbaas服务
service_plugins = [existing service plugins],neutron_lbaas.services.loadbalancer.plugin.LoadBalancerPluginv2
7.2 在[service_providers] 章节 设置lbaas 的服务提供者为octavia
service_provider = LOADBALANCERV2:Octavia:neutron_lbaas.drivers.octavia.driver.OctaviaDriver:default
8 启动服务
如果之前 开启了 LBaaS v2 with an agent 服务 请关闭，并清理下neutron数据库下 lbaas_loadbalancers lbaas_loadbalancer_statistics 不然会报错
同步数据库
octavia-db-manage upgrade head
重启neutron
systemctl restart neutron-server
启动octavia
systemctl restart octavia-housekeeping octavia-worker octavia-api octavia-health-manager
二 验证
9.1 创建loadbalancer
[root@controller ~]# neutron lbaas-loadbalancer-create --name test-lb-1 lbtest Created a new loadbalancer: +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | admin_state_up | True | | description | | | id | 5af472bb-2068-4b96-bcb3-bef7ff7abc56 | | listeners | | | name | test-lb-1 | | operating_status | OFFLINE | | pools | | | provider | octavia | | provisioning_status | PENDING_CREATE | | tenant_id | 9a4b2de78c2d45cfbf6880dd34877f7b | | vip_address | 192.168.123.10 | | vip_port_id | d163b73c-258a-4e03-90ad-5db31cfe23ac | | vip_subnet_id | 74aea53a-014a-4f9c-86f9-805a2a772a27 | +---------------------+--------------------------------------+
9.2 查看虚拟机，值得注意的地方，loadbalancer的地址是vip，和虚拟机的地址是不相同的
[root@controller ~]# openstack server list |grep 82b59e85-29f2-46ce-ae0b-045b7fceb5ca | 82b59e85-29f2-46ce-ae0b-045b7fceb5ca | amphora-734da57c-e444-4b8e-a706-455230ae0803 | ACTIVE | lbtest=192.168.123.9; lb-mgmt-net=192.168.0.6 | amphora-x64-haproxy 201610131607 |
9.3 创建linstener
neutron lbaas-listener-create --name test-lb-tcp --loadbalancer test-lb-1 --protocol TCP --protocol-port 22
9.4 设置安全组
neutron port-update --security-group default d163b73c-258a-4e03-90ad-5db31cfe23ac
9.5 创建pool,新建三台虚拟机，并加入pool
openstack server create --flavor m1.small --nic net-id=22525640-297e-40eb-bd77-0a9afd861f8c --p_w_picpath "cirros for kvm raw" --min 3 --max 3 test
[root@controller ~]# openstack server list |grep test-
| d8dc22d4-e657-4c54-96f9-3a53ca67533d | test-3 | ACTIVE | lbtest=192.168.123.8 | cirros for kvm raw |
| c7926665-84c5-48a5-9de5-5e15e71baa5d | test-2 | ACTIVE | lbtest=192.168.123.13 | cirros for kvm raw |
| fcf60c23-b799-4d08-a5a7-2b0fc9f1905e | test-1 | ACTIVE | lbtest=192.168.123.11 | cirros for kvm raw |
neutron lbaas-pool-create --name test-lb-pool-tcp --lb-algorithm ROUND_ROBIN --listener test-lb-tcp --protocol TCP
for i in {8,13,11}
do
neutron lbaas-member-create --subnet lbtest --address 192.168.123.${i} --protocol-port 22 test-lb-pool-tcp
done9.6 验证
[root@controller ~]# >/root/.ssh/known_hosts;ip netns exec qrouter-4718cc34-68cc-47a7-9201-405d1fc09213 ssh cirros@192.168.123.10 "hostname" The authenticity of host '192.168.123.10 (192.168.123.10)' can't be established. RSA key fingerprint is 72:c4:11:41:53:51:f2:1b:b5:e6:1b:69:a8:c2:5b:d4. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.123.10' (RSA) to the list of known hosts. cirros@192.168.123.10's password: test-3 [root@controller ~]# >/root/.ssh/known_hosts;ip netns exec qrouter-4718cc34-68cc-47a7-9201-405d1fc09213 ssh cirros@192.168.123.10 "hostname" The authenticity of host '192.168.123.10 (192.168.123.10)' can't be established. RSA key fingerprint is 3d:88:0f:4a:b1:77:c9:6a:fd:82:4d:31:0c:ca:82:d8. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.123.10' (RSA) to the list of known hosts. cirros@192.168.123.10's password: test-1 [root@controller ~]# >/root/.ssh/known_hosts;ip netns exec qrouter-4718cc34-68cc-47a7-9201-405d1fc09213 ssh cirros@192.168.123.10 "hostname" The authenticity of host '192.168.123.10 (192.168.123.10)' can't be established. RSA key fingerprint is 1c:03:f0:f9:92:a7:0f:5d:9d:09:22:14:94:62:e4:c4. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.123.10' (RSA) to the list of known hosts. cirros@192.168.123.10's password: test-2
三 过程分析
10.1 worker的相关操作
创建 云主机实例，关联到管理网络：
REQ: curl -g -i -X POST http://controller:8774/v2.1/9a4b2de78c2d45cfbf6880dd34877f7b/servers -H "User-Agent: python-novaclient" -H "Content-Type: application/json" -H "Accept: application/json" -H "X-OpenStack-Nova-API-Version: 2.1" -H "X-Auth-Token: {SHA1}0f810ab0fdd5b92489f73a7f0988adfc9da4e517" -d '{"server": {"name": "amphora-4f22d55b-0680-4111-aef6-da98c9ccd1d4", "p_w_picpathRef": "b23dda5f-210f-40e6-9c2c-c40e9daa661a", "key_name": "155", "flavorRef": "dd49b3d5-4693-4407-a76e-2ca95e00a9ec", "max_count": 1, "min_count": 1, "personality": [{"path": "/etc/octavia/amphora-agent.conf", "contents": ""}, {"path": "/etc/octavia/certs/client_ca.pem", "contents": "="}, {"path": "/etc/octavia/certs/server.pem", "contents": ""}], "networks": [{"uuid": "826be4f4-a23d-4c5c-bff5-7739936fac76"}], "security_groups": [{"name": "d949202b-ba09-4003-962f-746ae75809f7"}], "config_drive": true}}' _http_log_request /usr/lib/python2.7/site-packages/keystoneauth2/session.py:337当检测到目标云主机的管理网络状态变为active后进行下一步
REQ: curl -g -i -X GET http://controller:8774/v2.1/9a4b2de78c2d45cfbf6880dd34877f7b/servers/d3c97360-56b2-4f75-b905-2ef83870a342/os-interface -H "User-Agent: python-novaclient" -H "Accept: application/json" -H "X-OpenStack-Nova-API-Version: 2.1" -H "X-Auth-Token: {SHA1}3f6ccac4cb8b70b06fb5e62b9db2272702d8ec67" _http_log_request /usr/lib/python2.7/site-packages/keystoneauth2/session.py:337
2016-10-17 12:06:30.041 29993 DEBUG novaclient.v2.client [-] RESP: [200] Content-Length: 286 Content-Type: application/json Openstack-Api-Version: compute 2.1 X-Openstack-Nova-Api-Version: 2.1 Vary: OpenStack-API-Version, X-OpenStack-Nova-API-Version X-Compute-Request-Id: req-ccc07b37-e942-4a5b-a87a-b0e8d3887ba3 Date: Mon, 17 Oct 2016 04:06:30 GMT Connection: keep-alive
RESP BODY: {"interfaceAttachments": [{"port_state": "ACTIVE", "fixed_ips": [{"subnet_id": "4e3409e5-4e9a-4599-9b2e-f760b2fab380", "ip_address": "192.168.0.11"}], "port_id": "bbf99a69-0fb2-42a6-b7de-b7969bda9d73", "net_id": "826be4f4-a23d-4c5c-bff5-7739936fac76", "mac_addr": "fa:16:3e:01:04:2c"}]}2016-10-17 12:06:30.078 29993 DEBUG octavia.controller.worker.tasks.amphora_driver_tasks [-] Finalized the amphora. execute /usr/lib/python2.7/site-packages/octavia/controller/worker/tasks/amphora_driver_tasks.py:164
创建对外服务的vip的端口
2016-10-17 12:06:30.226 29993 DEBUG octavia.controller.worker.controller_worker [-] Task 'octavia.controller.worker.tasks.network_tasks.AllocateVIP' (af8ea5a0-42c8-4d30-9ffa-016668811fc8) transitioned into state 'RUNNING' from state 'PENDING' _task_receiver /usr/lib/python2.7/site-packages/taskflow/listeners/logging.py:189 2016-10-17 12:06:30.227 29993 DEBUG octavia.controller.worker.tasks.network_tasks [-] Allocate_vip port_id c7d7b552-83ac-4e0c-84bf-0b9cae661eab, subnet_id 74aea53a-014a-4f9c-86f9-805a2a772a27,ip_address 192.168.123.31 execute /usr/lib/python2.7/site-packages/octavia/controller/worker/tasks/network_tasks.py:328
在该vip下面创建一个实际的port 并把该port attach至 云主机
2016-10-17 12:06:32.662 29993 DEBUG octavia.network.drivers.neutron.allowed_address_pairs [-] Created vip port: 1627d28d-bf54-46eb-9d78-410c5d647bf4 for amphora: 3f6e22a1-e0b0-4098-ba20-daf47cfdae19 _plug_amphora_vip /usr/lib/python2.7/site-packages/octavia/network/drivers/neutron/allowed_address_pairs.py:97
2016-10-17 12:06:32.663 29993 DEBUG novaclient.v2.client [-] REQ: curl -g -i -X POST http://controller:8774/v2.1/9a4b2de78c2d45cfbf6880dd34877f7b/servers/d3c97360-56b2-4f75-b905-2ef83870a342/os-interface -H "User-Agent: python-novaclient" -H "Content-Type: application/json" -H "Accept: application/json" -H "X-OpenStack-Nova-API-Version: 2.1" -H "X-Auth-Token: {SHA1}3f6ccac4cb8b70b06fb5e62b9db2272702d8ec67" -d '{"interfaceAttachment": {"port_id": "1627d28d-bf54-46eb-9d78-410c5d647bf4"}}' _http_log_request /usr/lib/python2.7/site-packages/keystoneauth2/session.py:337创建listener
ip是192.168.235.10和192.168.235.19