后端支持服务为开发者提供即买即用的大数据服务，后端支持服务可以按照开发者的用量需求来申请，数十秒钟内即可得到一个高可用的后端支持服务。
使用后端支持服务，需要按需申请后端支持服务实例。
登录 DataFoundry，执行命令行：
$ oc get backingservice -n openshift
得到 DataFoundry 提供的后端支持服务，示例如下：
NAME LABELS BINDABLE STATUS
Cassandra asiainfo.io/servicebroker=etcd true Active
ETCD asiainfo.io/servicebroker=etcd true Active
Greenplum asiainfo.io/servicebroker=rdb true Active
Kafka asiainfo.io/servicebroker=etcd true Active
MongoDB asiainfo.io/servicebroker=rdb true Active
Mysql asiainfo.io/servicebroker=rdb true Active
PostgreSQL asiainfo.io/servicebroker=rdb true Active
RabbitMQ asiainfo.io/servicebroker=etcd true Active
Redis asiainfo.io/servicebroker=etcd true Active
Spark asiainfo.io/servicebroker=etcd true Active
Storm asiainfo.io/servicebroker=etcd true Active
ZooKeeper asiainfo.io/servicebroker=etcd true Active
以 MongoDB 为例，执行命令：
$ oc describe backingservice NAME -n openshift
参数说明：
- NAME ：后端支持服务名称
执行命令：
$ oc describe backingservice MongoDB -n openshift
得到 MongoDB 后端支持服务的描述：
Name: MongoDB
Created: 10 days ago
Labels: asiainfo.io/servicebroker=rdb
Annotations: Class=RDB
Description: A MongoDB Instance
Status: Active
Bindable: true
Updateable: false
documentationUrl: https://docs.mongodb.org/manual/
longDescription: MongoDB unleashes the power of software and data for innovators everywhere
providerDisplayName: asiainfoLDP
supportUrl: https://www.mongodb.org/
displayName: MongoDB
────────────────────
Plan: Experimental
PlanID: E28FB3AE-C237-484F-AC9D-FB0A80223F85
PlanDesc: share a mongodb database in one instance
PlanFree: true
Bullets:
20 GB of Disk
20 connections
PlanCosts:
CostUnit: MONTHLY
Amount:
eur: 49
usd: 99
CostUnit: 1GB of messages over 20GB
Amount:
eur: 0.49
usd: 0.99
────────────────────
Plan: ShareandCommon
PlanID: 257C6C2B-A376-4551-90E8-82D4E619C852
PlanDesc: share a mongodb database in one instance,but can select from database aqi_demo
PlanFree: false
Bullets:
20 GB of Disk
20 connections
PlanCosts:
CostUnit: MONTHLY
Amount:
eur: 49
usd: 99
CostUnit: 1GB of messages over 20GB
Amount:
eur: 0.49
usd: 0.99
No events.
执行命令：
$ oc new-backingserviceinstance NAME --backingservice_name=BackingServiceName --planid=BackingServicePlanGuid [options]
参数说明：
- NAME：后端支持服务实例名称；
- backingservice_name：后端支持服务名称；
- planid：订购的后端支持服务套餐 id。
以 MongoDB 为例，执行命令：
$ oc new-backingserviceinstance mongodb-demo --backingservice_name=MongoDB --planid=257C6C2B-A376-4551-90E8-82D4E619C852
执行命令：
$ oc get backingserviceinstance
查询结果：
NAME SERVICE PLAN BOUND STATUS
mongodb-demo MongoDB ShareandCommon 0 Unbound
my-mongodb MongoDB ShareandCommon 3 Bound
my-test-sql Mysql Experimental 0 Unbound
mysql-inst1 Mysql Experimental 0 Unbound
new-mongodb MongoDB ShareandCommon 0 Unbound
spark Spark-v1.5.2 One_Worker 2 Bound
内容说明：
- NAME：已申请的后端支持服务实例名称；
- SERVICE：后端支持服务实例所属的后端支持服务名称；
- PLAN：申请的后端支持服务实例所选套餐名称；
- BOUND：绑定服务的个数；
- STATUS：后端支持服务实例状态，可能的状态为：创建中、未绑定、已绑定、删除中。
执行命令：
$ oc describe backingserviceinstance NAME
参数说明：
NAME：后端支持服务实例名称。
以 mongodb-demo 为例，执行命令：
$ oc describe backingserviceinstance mongodb-demo
得到 mongodb-demo 后端支持服务实例描述：
Name: mongodb-demo
Created: 2 minutes ago
Labels: <none>
Annotations: <none>
Status: Unbound
DashboardUrl: http://rockmongo-service-broker-db.app.dataos.io/index.php?action=autologin.index&user=66ac2632a7ec0ea0a9480d513539f773&pass=6ba8f37b0a9c914c0bc0adffb37646a7&instance=a20ad002-1d98-11e6-813a-fa163d0e0615
BackingServiceName: MongoDB
BackingServicePlanName: ShareandCommon
BackingServicePlanGuid: 257C6C2B-A376-4551-90E8-82D4E619C852
Parameters:
instance_id: a20ad002-1d98-11e6-813a-fa163d0e0615
Bound: 0
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
2m 2m 1 {bsi} Normal Provisioning bsi provisioning done, instanceid: a20ad002-1d98-11e6-813a-fa163d0e0615
执行命令：
$ oc bind BackingServiceInstanceName DeployConfigName [options]
参数说明：
- BackingServiceInstanceName：绑定的后端支持服务实例名称；
- DeployConfigName：绑定的服务名称。
以 mongodb-demo 与 RStudio 绑定为例：
执行命令：
$ oc bind mongodb-demo rstudio
执行命令，查看后端支持服务实例：
$ oc get backingserviceinstance
执行结果：
NAME SERVICE PLAN BOUND STATUS
mongodb-demo MongoDB ShareandCommon 1 Bound
my-mongodb MongoDB ShareandCommon 3 Bound
my-test-sql Mysql Experimental 0 Unbound
mysql-inst1 Mysql Experimental 0 Unbound
new-mongodb MongoDB ShareandCommon 0 Unbound
spark Spark-v1.5.2 One_Worker 2 Bound
可看到 mongodb-demo 已绑定一个服务。
执行命令，查看绑定的服务的详情：
Name: rstudio
Created: 5 weeks ago
Labels: run=rstudio
Annotations: openshift.io/deployment.cancelled=5
Latest Version: 9
Selector: run=rstudio
Replicas: 1
Triggers: Config
Strategy: Rolling
Template:
Labels: run=rstudio
Containers:
rstudio:
Image: registry.dataos.io/guestbook/rstudio
Port:
QoS Tier:
cpu: BestEffort
memory: BestEffort
Environment Variables:
VCAP_SERVICES: {"MongoDB":[{"name":"mongodb-demo","label":"","plan":"ShareandCommon","credentials":{"Host":"dashboard.servicebroker.dataos.io","Name":"a20ad002-1d98-11e6-813a-fa163d0e0615","Password":"382565069e4325e17f7406c61bb69f17","Port":"27017","Uri":"mongodb://c5b787259abb48fc5124e7b87994e4da:382565069e4325e17f7406c61bb69f17@dashboard.servicebroker.dataos.io:27017/a20ad002-1d98-11e6-813a-fa163d0e0615","Username":"c5b787259abb48fc5124e7b87994e4da","Vhost":""}}]}
BSI_MONGODBDEMO_PORT: 27017
BSI_MONGODBDEMO_VHOST:
BSI_MONGODBDEMO_URI: mongodb://c5b787259abb48fc5124e7b87994e4da:382565069e4325e17f7406c61bb69f17@dashboard.servicebroker.dataos.io:27017/a20ad002-1d98-11e6-813a-fa163d0e0615
BSI_MONGODBDEMO_NAME: a20ad002-1d98-11e6-813a-fa163d0e0615
BSI_MONGODBDEMO_USERNAME: c5b787259abb48fc5124e7b87994e4da
BSI_MONGODBDEMO_PASSWORD: 382565069e4325e17f7406c61bb69f17
BSI_MONGODBDEMO_HOST: dashboard.servicebroker.dataos.io
No volumes.
Deployment #9 (latest):
Name: rstudio-9
Created: 19 minutes ago
Status: Complete
Replicas: 1 current / 1 desired
Selector: deployment=rstudio-9,deploymentconfig=rstudio,run=rstudio
Labels: openshift.io/deployment-config.name=rstudio,run=rstudio
Pods Status: 1 Running / 0 Waiting / 0 Succeeded / 0 Failed
Deployment #8:
Created: 11 days ago
Status: Complete
Replicas: 0 current / 0 desired
Deployment #7:
Created: 12 days ago
Status: Failed
Replicas: 0 current / 0 desired
Deployment #6:
Created: 4 weeks ago
Status: Complete
Replicas: 0 current / 0 desired
Deployment #5:
Created: 4 weeks ago
Status: Complete
Replicas: 0 current / 0 desired
Deployment #4:
Created: 4 weeks ago
Status: Failed
Replicas: 0 current / 0 desired
Deployment #3:
Created: 4 weeks ago
Status: Complete
Replicas: 0 current / 0 desired
Deployment #2:
Created: 4 weeks ago
Status: Failed
Replicas: 0 current / 0 desired
Deployment #1:
Created: 5 weeks ago
Status: Complete
Replicas: 0 current / 0 desired
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
19m 19m 1 {deploymentconfig-controller } Normal DeploymentCreated Created new deployment "rstudio-9" for version 9
19m 19m 1 {deployment-controller } Warning FailedUpdate Cannot update deployment dangsha/rstudio-9 status to Pending: replicationcontrollers "rstudio-9" cannot be updated: the object has been modified; please apply your changes to the latest version and try again
服务的配置详情中，后端支持服务实例环境变量被加入了服务的配置信息中。
环境变量的命名规则：BSI_$BSINAME_$ENV
执行命令：
oc unbind BackingServiceInstanceName DeployConfigName
参数说明：
- BackingServiceInstanceName：后端支持服务实例名称；
- DeployConfigName：服务名称。
以 mongodb-demo 与 RStudio 解绑为例：
oc unbind mongodb-demo rstudio
可用 oc get bsi 以及 oc describe dc dcname 来查询解绑是否成功。
登录 DataFoundry，点击“后端支持服务”，查看后端支持服务。
点击“申请实例”，输入后端支持服务实例名称，选择服务套餐，点击创建。
点击“我的后端服务实例”，查看已申请的后端支持服务实例。
点击“我的后端服务实例”，点击“服务绑定”、“新增绑定”，从服务列表中，选择要绑定的服务。
