建立高可用OpenStack云系列-- 建立HA Openstack云（六）：安装Nova

其实，本论坛上已经有了关于Nova的单独帖子内容
在这里也贴出来，目的是为了与之前的帖子《建立HA Openstack云系列6篇》连贯起来。






                                               建立HA Openstack云（六）：安装Nova


在MySQL, RabbitMQ, Keystone和Glance之后，我们要来安装要用Pacemaker管理的Nova服务，并让它们高度可用。
和其他教程一样，当编辑/etc/nova/api-paste.ini，还要改动服务主机：

service_protocol=http
service_host = clusterkeystone
service_port = 5000
auth_host = clusterkeystone
auth_port = 35357
auth_protocol = http
auth_uri = http://clusterkeystone:5000/
admin_tenant_name = service
admin_user = nova
admin_password = nova
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还有，在做nova-manage db sync之前，一定要设置SQL主机为“clustermysql”，我这里这样设置/etc/nova/nova.conf：

[DEFAULT]
dhcpbridge_flagfile=/etc/nova/nova.conf
dhcpbridge=/usr/bin/nova-dhcpbridge
logdir=/var/log/nova
state_path=/var/lib/nova
lock_path=/run/lock/nova
allow_admin_api=true
use_deprecated_auth=false
auth_strategy=keystone
scheduler_driver=nova.scheduler.simple.SimpleScheduler
s3_host=clusterglance
ec2_host=clusterec2
ec2_dmz_host=clusterec2
rabbit_host=clusterrabbit
cc_host=clusterec2
nova_url=http://clusternova:8774/v1.1/
glance_api_servers=clusterglance:9292
image_service=nova.image.glance.GlanceImageService
iscsi_ip_prefix=192.168.4
sql_connection=mysql://novadbadmin:password@clustermysql/nova
ec2_url=http://clusterec2:8773/services/Cloud
keystone_ec2_url=http://clusterkeystone:5000/v2.0/ec2tokens
api_paste_config=/etc/nova/api-paste.ini
libvirt_type=kvm
libvirt_use_virtio_for_bridges=true
start_guests_on_host_boot=true
resume_guests_state_on_host_boot=true
novnc_enabled=true
novncproxy_base_url=http://5.9.x.x:6080/vnc_auto.html
vncserver_proxyclient_address=10.8.0.1
vncserver_listen=0.0.0.0
network_manager=nova.network.manager.FlatDHCPManager
public_interface=eth0
flat_interface=eth2
flat_network_bridge=br100
flat_injected=False
force_dhcp_release=true
iscsi_helper=tgtadm
connection_type=libvirt
root_helper=sudo nova-rootwrap
verbose=True
debug=True
multi_host=true
enabled_apis=ec2,osapi_compute,osapi_volume,metadata
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再次检查你的/etc/hosts，确保你已经把“clustermysql”，“clusterglance”这样的虚拟IP声明成你在Keystone安装(在终端配置里)和MySQL认证时设定的那样。
现在你可以官方教程里的db_sync部分了。
我们必须停止服务并让它们由Pacemaker管理：

service nova-api stop
service nova-cert stop
service nova-compute stop
service nova-consoleauth stop
service nova-network stop
service nova-objectstore stop
service nova-scheduler stop
service nova-volume stop
service novnc stop
echo "manual" > /etc/init/nova-api.override
echo "manual" > /etc/init/nova-cert.override
echo "manual" > /etc/init/nova-compute.override
echo "manual" > /etc/init/nova-consoleauth.override
echo "manual" > /etc/init/nova-network.override
echo "manual" > /etc/init/nova-objectstore.override
echo "manual" > /etc/init/nova-scheduler.override
echo "manual" > /etc/init/nova-volume.override
echo "manual" > /etc/init/novnc.override
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为服务下载资源代理：

cd /usr/lib/ocf/resource.d/openstack/
wget https://raw.github.com/leseb/OpenStack-ra/master/nova-api-ra
wget https://raw.github.com/leseb/OpenStack-ra/master/nova-cert-ra
wget https://raw.github.com/leseb/OpenStack-ra/master/nova-consoleauth-ra
wget https://raw.github.com/leseb/OpenStack-ra/master/nova-scheduler-ra
wget https://raw.github.com/leseb/OpenStack-ra/master/nova-vnc-ra
wget https://raw.github.com/alex88/nova-network-ra/master/nova-network-ra
wget https://raw.github.com/alex88/nova-compute-ra/master/nova-compute-ra
wget https://raw.github.com/alex88/nova-objectstore-ra/master/nova-objectstore-ra
wget https://raw.github.com/alex88/nova-volume-ra/master/nova-volume-ra
chmod +x *
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设置服务随Pacemaker启动：

crm configure primitive novaApiService ocf:openstack:nova-api-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="5s" timeout="5s"
crm configure primitive novaCertService ocf:openstack:nova-cert-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaConsoleauthService ocf:openstack:nova-consoleauth-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaSchedulerService ocf:openstack:nova-scheduler-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaVncService ocf:openstack:nova-vnc-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaNetworkService ocf:openstack:nova-network-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaComputeService ocf:openstack:nova-compute-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaObjectstoreService ocf:openstack:nova-objectstore-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure primitive novaVolumeService ocf:openstack:nova-volume-ra \
params config="/etc/nova/nova.conf" \
op monitor interval="30s" timeout="30s"
crm configure clone novaVolume novaVolumeService \
meta clone-max="2" clone-node-max="1"
crm configure clone novaNetwork novaNetworkService \
meta clone-max="2" clone-node-max="1"
crm configure clone novaCompute novaComputeService \
meta clone-max="2" clone-node-max="1"
crm configure clone novaApi novaApiService \
meta clone-max="2" clone-node-max="1"
crm configure clone novaVnc novaVncService \
meta clone-max="2" clone-node-max="1"
crm configure group novaServices novaConsoleauthService novaCertService novaSchedulerService
crm configure order novaServices_after_keystone inf: Keystone novaServices
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注意：一定根据你的需要的用处来使用clone指令，其实我在Api and Network上使用clone，因为我运行的是multi_host openstack。
我的nova.conf里面说s3_host是glance ip，一定要编辑group Glance来包括nova-objectstore服务，所以要进行crm configure edit并确保有这一行：
group Glance glanceIP novaObjectstoreService glanceApiService glanceRegistryService
现在你就能查看OpenStack集群的状态了：

Binary Host Zone Status State Updated_At
nova-compute server1 nova enabled :-) 2012-07-31 10:00:27
nova-compute server2 nova enabled :-) 2012-07-31 10:00:19
nova-network server2 nova enabled :-) 2012-07-31 10:00:26
nova-network server1 nova enabled :-) 2012-07-31 10:00:26
nova-scheduler server2 nova enabled :-) 2012-07-31 10:00:26
nova-consoleauth server2 nova enabled :-) 2012-07-31 10:00:26
nova-cert server2 nova enabled :-) 2012-07-31 10:00:26
nova-volume server1 nova enabled :-) 2012-07-31 10:00:26
nova-volume server2 nova enabled :-) 2012-07-31 10:00:26
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好了，现在你已经有了所有Corosync+Pacemaker管理的Openstack组件了。Openstack的虚拟机高可用性特性仍在开发，敬请期待这方面的更新。

上一篇：
建立高可用OpenStack云系列--建立HA Openstack云（五）：安装Glance