源码安装 OpenStack icehouse Trove 项目

关于 Trove 这个 DbaaS 项目介绍可以看官方 wiki 里介绍。本文主要目的就是把 Trove 能安装上、并且用起来。

https://wiki.openstack.org/wiki/Trove

同时 Trove 有一个项目专门负责安装 Trove-integration，基本上通过几条命令就可以安装好一个 trove 环境，装了几次，一直没能成功的创建过一个 db instance。

这个项目会自动把 devstack 安装一遍，然后安装 trove，build 一个镜像，上传到 glance 镜像库中，网络好有耐心的朋友可以尝试一下：

https://github.com/openstack/trove-integration

Trove 默认把数据库目录挂载到了 cinder 卷上面，同时备份的数据库会存放到 swift 对象存储中，也可以选择使用 heat 模版，对其它组建依赖性比较强，本文是基于一个 icehouse openstack 环境上（包含所有的核心项目）扩展了 trove。

目录

• 1 下载、安装包
• 2 创建 Trove 用户
• 3 配置 Trove
  • 3.1 事先准备
  • 3.2 trove-api 配置
  • 3.3 trove-conductor 配置
  • 3.4 trove-taskmanager 配置
  • 3.5 同步数据库
  • 3.6 制作系统服务
  • 3.7 启动服务
  • 3.8 自定义 heat 模版
• 4 定义 Trove
• 5 命令行方式创建 trove 实例
• 6 界面创建方式 trove 实例

下载、安装包

先把 trove 的源代码下载下来：

git clone https://github.com/openstack/trove.git /opt/trove
git clone https://github.com/openstack/python-troveclient.git /opt/python-troveclient

安装 troveclient:

cd /opt/python-troveclient
python setup.py egg_info
pip install -r python_troveclient.egg-info/requires.txt
python setup.py develop

安装 Trove icehouse release：

cd /opt/trove
git checkout stable/icehouse
python setup.py egg_info
pip install -r trove.egg-info/requires.txt
python setup.py develop

创建 Trove 用户

我使用了环境变量，省得敲一堆 –os 参数，而 trove 的租户最好和 nova 的租户相同，trove 会使用 nova-compute 资源，下面用来创建 trove 用户：

keystone user-create \
         --name=trove \
         --pass=password \
         --tenand-id=$(keystone tenant-get service | awk '/ id / {print $4}') \
         [email protected]

给 trove 用户添加 admin 角色：

keystone user-role-add --tenand-id=$(keystone tenant-get service | awk '/ id / {print $4}') \
                       --user-id=$(keystone user-get trove | awk '/ id / {print $4}') \
                       --role-id=$(keystone role-get admin | awk '/ id / {print $4}')

创建 trove 服务，类型为 databases:

keystone service-create --name=trove --type=database --description='OpenStack Trove Service'

给 trove 服务添加 api 访问地址：

keystone endpoint-create --region RegionOne \
                         --service-id=$(keystone service-get trove | awk '/ id / {print $4}') \
                         --publicurl 'http://127.0.0.1:8779/v1.0/$(tenant_id)s' \
                         --adminurl 'http://127.0.0.1:8779/v1.0/$(tenant_id)s' \
                         --internalurl 'http://127.0.0.1:8779/v1.0/$(tenant_id)s'

配置 Trove

事先准备

创建 trove 需要的目录：

mkdir /etc/trove /var/log/trove /var/lib/trove

使用 mysql 作为 trove 后端 db：

mysql -uroot -p
> create database trove default character set utf8;
> grant all on trove.* to 'trove'@'localhost' identified by 'trove';    

指定 trove 使用的 neutron 网络：

如果还没有创建网络，需要用 admin 账号创建一个共享的外部网络和一共享的内部网络，接上路由器。
目前 trove 在 horizon 上还不支持选择网络，只能在配置文件中指定一个网络 id。

neutron net-list
+--------------------------------------+------------------+-----------------------------------------------------+
| id                                   | name             | subnets                                             |
+--------------------------------------+------------------+-----------------------------------------------------+
| 30190693-9150-46e1-af48-9ab90fbd4a3e | Public           | 947c4e3e-ab1e-46b8-b5a1-1c238828e776 192.168.8.0/24 |
| 9cbae051-78c7-4574-968e-2cb9b0f410ad | Internal         | fded8a32-f850-4e2e-8532-3326872204a7 10.0.0.0/24    |
+--------------------------------------+------------------+-----------------------------------------------------+   

从上面网络信息中把内部网络的 id 号提取出来，在 trove.conf 中和命令行创建都会用到：

default_neutron_networks ＝ 9cbae051-78c7-4574-968e-2cb9b0f410ad    

trove 三个服务的配置文件主要参考了 cfg.py 和 *.sample，虽然有些参数不太确定，但是目前服务运行正常. 下面的配置文件可能并不适合每个人，需要自己修改密码、ip 地址之类的。

trove-api 配置

/etc/trove/api-paste.init 内容如下：

[composite:trove]
use = call:trove.common.wsgi:versioned_urlmap
/: versions
/v1.0: troveapi

[app:versions]
paste.app_factory = trove.versions:app_factory

[pipeline:troveapi]
pipeline = faultwrapper authtoken authorization contextwrapper ratelimit extensions troveapp
#pipeline = debug extensions troveapp

[filter:extensions]
paste.filter_factory = trove.common.extensions:factory

[filter:authtoken]
paste.filter_factory = keystoneclient.middleware.auth_token:filter_factory
auth_host = 127.0.0.1
auth_port = 35357
auth_protocol = http
auth_uri = http://127.0.0.1:5000/v2.0
admin_user = trove
admin_tenant_name = service
admin_password = password
# signing_dir is configurable, but the default behavior of the authtoken
# middleware should be sufficient.  It will create a temporary directory
# in the home directory for the user the trove process is running as.
signing_dir = /var/lib/trove/keystone-signing

[filter:authorization]
paste.filter_factory = trove.common.auth:AuthorizationMiddleware.factory

[filter:contextwrapper]
paste.filter_factory = trove.common.wsgi:ContextMiddleware.factory

[filter:faultwrapper]
paste.filter_factory = trove.common.wsgi:FaultWrapper.factory

[filter:ratelimit]
paste.filter_factory = trove.common.limits:RateLimitingMiddleware.factory

[app:troveapp]
paste.app_factory = trove.common.api:app_factory

#Add this filter to log request and response for debugging
[filter:debug]
paste.filter_factory = trove.common.wsgi:Debug

/etc/trove/trove.conf 内容如下：

[DEFAULT]
# Show more verbose log output (sets INFO log level output)
verbose = True

# Show debugging output in logs (sets DEBUG log level output)
debug = True

default_datastore = mysql
datastore_manager = mysql
# Address to bind the API server
bind_host = 0.0.0.0

# Port the bind the API server to
bind_port = 8779

# Number of child processes to run
#trove_api_workers=5

# AMQP Connection info
rabbit_host = 127.0.0.1
rabbit_password = guest

# SQLAlchemy connection string for the reference implementation
# registry server. Any valid SQLAlchemy connection string is fine.
# See: http://www.sqlalchemy.org/docs/05/reference/sqlalchemy/connections.html#sqlalchemy.create_engine
# sql_connection = sqlite:///trove_test.sqlite
sql_connection = mysql://trove:[email protected]/trove?charset=utf8
#sql_connection = postgresql://trove:[email protected]/trove

# Period in seconds after which SQLAlchemy should reestablish its connection
# to the database.
#
# MySQL uses a default `wait_timeout` of 8 hours, after which it will drop
# idle connections. This can result in 'MySQL Gone Away' exceptions. If you
# notice this, you can lower this value to ensure that SQLAlchemy reconnects
# before MySQL can drop the connection.
sql_idle_timeout = 3600
mysql.usage_timeout = 600

# Maximum line size of message headers to be accepted.
# max_header_line may need to be increased when using large tokens
# (typically those generated by the Keystone v3 API with big service
# catalogs)
# max_header_line = 16384

#DB Api Implementation
db_api_implementation = "trove.db.sqlalchemy.api"

# Path to the extensions
api_extensions_path = trove/extensions/routes
guest_config = /etc/trove/conf.d/guest_info
cloudinit_location = /etc/trove/cloudinit

# Configuration options for talking to nova via the novaclient.
trove_auth_url = http://0.0.0.0:5000/v2.0
nova_compute_url = http://127.0.0.1:8774/v2
cinder_url = http://127.0.0.1:8776/v1
swift_url = http://127.0.0.1:8080/v1/AUTH_
heat_url = http://127.0.0.1:8004/v1

use_heat = True
template_path = /etc/trove/templates/

# Config option for showing the IP address that nova doles out
default_neutron_networks = 9cbae051-78c7-4574-968e-2cb9b0f410ad
network_label_regex = ^private$
#ip_regex = ^(15.|123.)

# Config options for enabling volume service
trove_volume_support = True
block_device_mapping = vdb
device_path = /dev/vdb
# Maximum volume size for an instance
max_accepted_volume_size = 10
max_instances_per_user = 5
# Maximum volume capacity (in GB) spanning across all trove volumes per tenant
max_volumes_per_user = 100
max_backups_per_user = 5
volume_time_out=30

# Config options for rate limits
http_get_rate = 200
http_post_rate = 200
http_put_rate = 200
http_delete_rate = 200

# Trove DNS
trove_dns_support = False
dns_account_id = 123456
dns_auth_url = http://127.0.0.1:5000/v2.0
dns_username = user
dns_passkey = password
dns_ttl = 3600
dns_domain_name = 'trove.com.'
dns_domain_id = 11111111-1111-1111-1111-111111111111
dns_driver = trove.dns.designate.driver.DesignateDriver
dns_instance_entry_factory = trove.dns.designate.driver.DesignateInstanceEntryFactory
dns_endpoint_url = http://127.0.0.1/v1/
dns_service_type = dns

# Taskmanager queue name
taskmanager_queue = taskmanager

# Auth
admin_roles = admin 

# Users to ignore for user create/list/delete operations
ignore_users = os_admin, root
ignore_dbs = lost+found, mysql, information_schema

# Guest related conf
agent_heartbeat_time = 10
agent_call_low_timeout = 5
agent_call_high_timeout = 150

# Reboot time out for instances
reboot_time_out = 60

# Trove api-paste file name
api_paste_config = /etc/trove/api-paste.ini


# ============ notifer queue kombu connection options ========================

notifier_queue_hostname = 127.0.0.1
notifier_queue_userid = guest
notifier_queue_password = guest
notifier_queue_ssl = False
notifier_queue_port = 5672
notifier_queue_virtual_host = /
notifier_queue_transport = memory

control_exchange = trove

# ============ Logging information =============================
log_dir = /var/log/trove
log_file = trove-api.log


# ============ SSL configuration (and enablement) =============================
# In order to enable SSL for the trove api server, uncomment
# the cert_file and key_file - and of course have those files
# accessible. The existence of those setting and files will
# enable SSL.

[ssl]

#cert_file = /path/to/server.crt
#key_file = /path/to/server.key
#optional:
#ca_file = /path/to/ca_file

[mysql]

root_on_create = False

# ================= Security groups related ========================
# Each future datastore implementation should implement
# its own oslo group with defined in it:
# - tcp_ports; upd_ports;

[mysql]
# Format (single port or port range): A, B-C
# where C greater than B
tcp_ports = 3306

[redis]
# Format (single port or port range): A, B-C
# where C greater than B
tcp_ports = 6379

[cassandra]
tcp_ports = 7000, 7001, 9042, 9160

[couchbase]
tcp_ports = 8091, 8092, 4369, 11209-11211, 21100-21199

trove-conductor 配置

/etc/trove/trove-conductor.conf 内容如下：

[DEFAULT]
verbose = True
debug = True
control_exchange = trove
trove_auth_url = http://127.0.0.1:5000/v2.0
sql_connection = mysql://trove:trove@localhost/trove?charset=utf8
rabbit_host = 127.0.0.1
rabbit_password = guest

trove-taskmanager 配置

/etc/trove/trove-taskmanager.conf 内容如下：

[DEFAULT]
# Show more verbose log output (sets INFO log level output)
verbose = True

# Show debugging output in logs (sets DEBUG log level output)
debug = True

# Updates service and instance task statuses if instance failed become active
update_status_on_fail = False

# AMQP Connection info
rabbit_host=127.0.0.1
rabbit_password=guest

# SQLAlchemy connection string for the reference implementation
# registry server. Any valid SQLAlchemy connection string is fine.
# See: http://www.sqlalchemy.org/docs/05/reference/sqlalchemy/connections.html#sqlalchemy.create_engine
sql_connection = mysql://trove:trove@localhost/trove?charset=utf8
# sql_connection = mysql://root:root@localhost/trove

# Period in seconds after which SQLAlchemy should reestablish its connection
# to the database.
#
# MySQL uses a default `wait_timeout` of 8 hours, after which it will drop
# idle connections. This can result in 'MySQL Gone Away' exceptions. If you
# notice this, you can lower this value to ensure that SQLAlchemy reconnects
# before MySQL can drop the connection.
sql_idle_timeout = 3600

#DB Api Implementation
db_api_implementation = trove.db.sqlalchemy.api

# Configuration options for talking to nova via the novaclient.
trove_auth_url = http://0.0.0.0:5000/v2.0
nova_compute_url = http://127.0.0.1:8774/v2
cinder_url = http://127.0.0.1:8776/v1
swift_url = http://127.0.0.1:8080/v1/AUTH_
heat_url = http://127.0.0.1:8004/v1
use_heat = True


# Config options for enabling volume service
trove_volume_support = True
block_device_mapping = vdb
device_path = /dev/vdb
mount_point = /var/lib/mysql
volume_time_out=30
server_delete_time_out=480

# Configuration options for talking to nova via the novaclient.
# These options are for an admin user in your keystone config.
# It proxy's the token received from the user to send to nova via this admin users creds,
# basically acting like the client via that proxy token.
nova_proxy_admin_user = admin
nova_proxy_admin_pass = password
nova_proxy_admin_tenant_name = admin

# Manager impl for the taskmanager
taskmanager_manager=trove.taskmanager.manager.Manager

# Manager sends Exists Notifications
exists_notification_transformer = trove.extensions.mgmt.instances.models.NovaNotificationTransformer
exists_notification_ticks = 30
#notification_service_id = mysql:2f3ff068-2bfb-4f70-9a9d-a6bb65bc084b

# Trove DNS
trove_dns_support = False
dns_account_id = 123456
dns_auth_url = http://127.0.0.1:5000/v2.0
dns_username = user
dns_passkey = password
dns_ttl = 3600
dns_domain_name = 'trove.com.'
dns_domain_id = 11111111-1111-1111-1111-111111111111
dns_driver = trove.dns.designate.driver.DesignateDriver
dns_instance_entry_factory = trove.dns.designate.driver.DesignateInstanceEntryFactory
dns_endpoint_url = http://127.0.0.1/v1/
dns_service_type = dns

# Trove Security Groups for Instances
trove_security_groups_support = True
trove_security_group_rule_cidr = 0.0.0.0/0

# Guest related conf
agent_heartbeat_time = 10
agent_call_low_timeout = 5
agent_call_high_timeout = 150

# Whether to use nova's contrib api for create server with volume
use_nova_server_volume = False

# Config option for filtering the IP address that DNS uses
network_label_regex = ^private$
#ip_regex = ^(15.|123.)

# Datastore templates
template_path = /etc/trove/templates/

# ============ notifer queue kombu connection options ========================

notifier_queue_hostname = 127.0.0.1
notifier_queue_userid = guest
notifier_queue_password = guest
notifier_queue_ssl = False
notifier_queue_port = 5672
notifier_queue_virtual_host = / 
notifier_queue_transport = memory

# usage notifications
notification_driver=trove.openstack.common.notifier.rpc_notifier
control_exchange=trove

# ============ Logging information =============================
log_dir = /var/log/trove
log_file = trove-taskmanager.log

# ============ PyDev remote dubugging =============================

# Enable or disable pydev remote debugging.
# There are three values allowed: 'disabled', 'enabled' and 'auto'
# If value is 'auto' tries to connect to remote debugger server,
# but in case of error continue running with disabled debugging
pydev_debug = disabled

# remote debug server host and port options
#pydev_debug_host = localhost
#pydev_debug_port = 5678

# path to pydevd library. It will be used if pydevd is absent in sys.path
#pydev_path = 

# ================= Guestagent related ========================
#guest_config = $pybasedir/etc/trove/trove-guestagent.conf.sample
#cloudinit_location = /etc/trove/cloudinit

# ================= Security groups related ========================
# Each future datastore implementation should implement
# its own oslo group with defined in it:
# - tcp_ports; upd_ports;

[mysql]
# Format (single port or port range): A, B-C
# where C greater than B
tcp_ports = 3306

[redis]
# Format (single port or port range): A, B-C
# where C greater than B
tcp_ports = 6379

[cassandra]
tcp_ports = 7000, 7001, 9042, 9160

[couchbase]
tcp_ports = 8091, 8092, 4369, 11209-11211, 21100-21199

同步数据库

trove-manage --config-file=/etc/trove/trove.conf db_sync

制作系统服务

把 trove 三个服务做成系统服务，方便点。

/etc/init/trove-api.conf：

description "Trove API Server"
author "Longgeek "
start on (local-filesystems and net-device-up IFACE!=lo)
stop on runlevel [016]
respawn

exec su -s /bin/sh -c "exec trove-api --config-file=/etc/trove/trove.conf" root 

/etc/init/trove-conductor.conf：

description "Trove Conductor Server"
author "Longgeek "
start on (local-filesystems and net-device-up IFACE!=lo)
stop on runlevel [016]
respawn

exec su -s /bin/sh -c "exec trove-conductor --config-file=/etc/trove/trove-conductor.conf --log-file /var/log/trove/trove-conductor.log" root

/etc/init/trove-taskmanager.conf：

description "Trove TaskManager Server"
author "Longgeek "
start on (local-filesystems and net-device-up IFACE!=lo)
stop on runlevel [016]
respawn

exec su -s /bin/sh -c "exec trove-taskmanager --config-file=/etc/trove/trove-taskmanager.conf --log-file /var/log/trove/trove-taskmanager.log" root

upstart 脚本链接：

ln -s /lib/init/upstart-job /etc/init.d/trove-api
ln -s /lib/init/upstart-job /etc/init.d/trove-conductor
ln -s /lib/init/upstart-job /etc/init.d/trove-taskmanager

加入到开启启动：

update-rc.d trove-api defaults
update-rc.d trove-conductor defaults
update-rc.d trove-taskmanager defaults  

启动服务

for serv in api conductor taskmanager; do /etc/init.d/trove-$serv restart; done

自定义 heat 模版

上面在配置文件中指定了 heat 模版的路径，如下：

template_path = /etc/trove/templates/

需要拷贝源代码目录中的 templates 所有 heat 模版到 trove 目录中：

cp -r /opt/trove/trove/templates /etc/trove/

自定义 heat 模版，这时候你需要读我的 trove 镜像文章，应该会明白为什么要自定义 heat 模版：

http://longgeek.com/2014/05/19/openstack-trove-dedicated-mirror-making

修改 heat 模版，在模版中可以看到 sudo service trove-guest start 这个 trove-guest 服务，它其实是一个 cli，只存在与 trove-integration 项目中，所以需要改为 trove-guestagent，同样可以添加多条命令，下面的 see 我用来替换了配置文件中 change_me 这个关键字为我的服务具体的 IP 地址，同样可以使用类似方法修改 rabbit_passwd、nova 密码之类的：

vim /etc/trove/templates/mysql/heat.template

56       UserData:
57         Fn::Base64:
58           Fn::Join:
59           - ''
60           - ["#!/bin/bash -v\n",
61               "/opt/aws/bin/cfn-init\n",
62               "sudo sed -i 's/change_me/192.168.8.242/g' /etc/trove/trove-guestagent.conf\n",
63               "sudo /etc/init.d/trove-guestagent restart\n"]

定义 Trove

trove 用来启动不同数据库，需要事先定义不同类型数据库，在 trove 里叫 datastore。
下面是定义一个 mysql type的过程，前提做好了 trove 的镜像，且已上传：

创建 datastore type：

trove-manage datastore_update mysql ''

查看 datastore：

trove datastore-list
+--------------------------------------+--------------+
|                  id                  |     name     |
+--------------------------------------+--------------+
| 10000000-0000-0000-0000-000000000001 | Legacy MySQL |
| ea341501-c134-4a62-ab4f-47813a74d190 |    mysql     |
+--------------------------------------+--------------+

给 datastore 指定专属镜像、mysql 具体的版本，同时启用这个 datastore：

glance image-list | grep 'Ubuntu-12.04.4-Server-Trove-Mysql-5.5' | awk '{print $2}'
bb23f309-64d6-40ae-8d19-4d8404aabc39

trove-manage --config-file=/etc/trove/trove.conf \
             datastore_version_update \
             mysql 5.5 mysql \
             bb23f309-64d6-40ae-8d19-4d8404aabc39 \
             mysql-server-5.5 1

指定默认的版本：

trove-manage --config-file=/etc/trove/trove.conf datastore_update mysql 5.5

查看 datastore 信息：

trove datastore-show mysql
+-----------------+--------------------------------------+
|     Property    |                Value                 |
+-----------------+--------------------------------------+
| default_version | 8bacae40-c1ab-4444-9720-6d574901dbb5 |
|        id       | ea341501-c134-4a62-ab4f-47813a74d190 |
|       name      |                mysql                 |
+-----------------+--------------------------------------+

查看 datastore 有哪些版本：

trove datastore-version-list mysql
+--------------------------------------+------+
|                  id                  | name |
+--------------------------------------+------+
| 8bacae40-c1ab-4444-9720-6d574901dbb5 | 5.5  |
+--------------------------------------+------+

查看 datastore 某个版本的详细信息：

trove datastore-version-show 8bacae40-c1ab-4444-9720-6d574901dbb5
+-----------+--------------------------------------+
|  Property |                Value                 |
+-----------+--------------------------------------+
|   active  |                 True                 |
| datastore | ea341501-c134-4a62-ab4f-47813a74d190 |
|     id    | 8bacae40-c1ab-4444-9720-6d574901dbb5 |
|   image   | cc3a7b02-5346-4d9f-8b94-7519c7429eee |
|    name   |                 5.5                  |
|  packages |           mysql-server-5.5           |
+-----------+--------------------------------------+

命令行方式创建 trove 实例

先看看 trove create 需要哪些参数：

trove create
usage: trove create  
                    [--size ]
                    [--databases  [ ...]]
                    [--users  [ ...]] [--backup ]
                    [--availability_zone ]
                    [--datastore ]
                    [--datastore_version ]
                    [--nic ]
                    [--configuration ]
error: too few arguments
Try 'trove help create' for more information.

一次性创建三个数据库： trovedba、trovedbb、trovedbc，并设置数据库用户和密码：

trove create TROVE_INSTANCE_NAME 2 --size 2 \
                                   --databases trovedba trovedbb trovedbc \
                                   --users longgeek:password \
                                   --datastore_version 5.5 \
                                   --datastore mysql \
                                   --nic net-id=9cbae051-78c7-4574-968e-2cb9b0f410ad

查看 trove instance 信息：

trove list
trove show INSTANCE_ID
trove user-list INSTANCE_ID
trove database-list INSTANCE_ID

界面创建方式 trove 实例

界面创建有一些缺陷，不能去指定 instance 所使用的网络、要创建数据库的类型，当然 horizon 的进度在 trove API 之后，估计 juno rc1、rc2 差不多就可以出来。现在的情况是界面上创建的 instance 后使用配置文件中指定的网络 id，用户没有办法去选择，同时创建的数据库类型也是在配置文件指定了默认的类型 default_datastore = mysql：

先上图看看 Trove 界面：

创建一个 trove instance，输入 instance 名字，选择一个 flavor，以及使用的 cinder volume 大小：

填入要创建的数据库名字、用户名、密码，以及访问限制：

创建完成了，状态显示正在 Build…：

那就看看它调用其它组件都做了什么，Heat 界面上自动生成了一个 stack，定义了 zone、volume、neutron、SecurityGroup、instance 等：

在来看看网络拓扑，绿色名为 Internal 是 admin 用户创建的一个共享内网网络，同时也写在了 trove.conf 中：

在创建 trove instance 时候，分配了 5G 的 volume 给 vm：

在 nova instance 界面中看到如下：

创建 trove instance 时候会自动根据 datastore type 来指定一个单独的安全组，默认开了相关数据库服务端口号：

刚才在 nova instance 界面中看到 vm 状态已经 Active，在回到 trove 的 database instance 上看到 vm 还是在 build 中，那就是 vm 正在启动，执行 cloud-init 自动扩展根分区、metadata 以及 heat 模版中自定义的脚本，最后重启了 trove-guestagent 服务，而 trove-guestagent 会监听 rpc 消息队列，trove-guestagent 服务启动后，更新状态为 Running，发送 rpc 消息，taskmanager 收到消息后，发送创建 db 请求，trove-guestagent 收到请求后创建相应 db，最后发送 Active 状态消息给 rpc，trove-taskmanager 收到 Active 消息后，不再发送创建数据库消息，而 trove-conductor 同时收到 trove-guestagent Active 消息后，去数据库里更新 trove instance 的状态，在界面就可以看到 instance Active 的状态了：

现在就可以验证数据库和用户到底有没有创建成功，heat 模版会自动给 instance 添加 floating ip，可以通过 floating ip 连接到数据库：

longgeek:~ Longgeek$ mysql -ulonggeek -ppassword -h 192.168.8.65
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 55
Server version: 5.5.37-0ubuntu0.12.04.1 (Ubuntu)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| dbname1            |
| dbname2            |
| dbname3            |
| dbname4            |
+--------------------+
5 rows in set (0.01 sec)

mysql> 

在来看看备份操作，输入一个备份名字、选择备份的 trove instance：

trove-guestagent 会执行命令去备份数据库：

默认备份的数据是放在了 swift 对象存储上，增加了数据的冗余性：

trove-guestagent 需要使用 keystone、amqp、swift，所在在创建 keystone、swift 的 endpoint 时候别弄成 127.0.0.1。
至于其它类型的数据库，还没有来得及做测试，后期有时间会记录一下。