作者:Peter Stachowski peter@tesora.com,Trevor McCasland TM2086@att.com
翻译:S-tec
要继续执行此文档,我们建议您已安装数据库服务(trove),并将数据库的镜像填入您想要的数据库的类型和版本,并且可以创建和访问数据库。
此示例显示如何创建和应用模块到MySQL 5.6数据库和redis 3.2.6数据库集群。
如果要应用模块,则必须首先创建模块,并将其注册到trove服务。 用户不能直接将模块应用于trove实例。
这里创建的模块是一个名为ping的演示模块。 它是用于测试目的的基本类型。 要创建它,就像以下一样简单:command:echo命令:
$ echo“message = Module.V1”> ping1.dat
您可以通过执行以下操作来创建应用模块的测试模块和mysql数据库:
$ trove module-create mymod ping ping1.dat --live_update \
--datastore mysql
+----------------------+--------------------------------------+
| Property | Value |
+----------------------+--------------------------------------+
| apply_order | 5 |
| auto_apply | False |
| created | 2017-06-02T17:06:21 |
| datastore | all |
| datastore_id | None |
| datastore_version | all |
| datastore_version_id | None |
| description | None |
| id | 0065a8ed-0668-4db5-a4ad-d88d0a166388 |
| instance_count | 2 |
| is_admin | True |
| live_update | True |
| md5 | 7f700cc7b99606615f8b51946f6d3228 |
| name | mymod |
| priority_apply | False |
| tenant | eac1e46e5f7840e39012aff46a92073a |
| tenant_id | eac1e46e5f7840e39012aff46a92073a |
| type | ping |
| updated | 2017-06-02T17:06:21 |
| visible | True |
+----------------------+--------------------------------------+
$ trove create myinst 15 --size 1 --module mymod --datastore mysql
+-------------------------+--------------------------------------+
| Property | Value |
+-------------------------+--------------------------------------+
| created | 2017-06-02T17:22:24 |
| datastore | mysql |
| datastore_version | 5.6 |
| encrypted_rpc_messaging | True |
| flavor | 15 |
| id | 6221b30c-8292-4378-b624-c7e9b0f8ba9e |
| name | myinst |
| region | RegionOne |
| server_id | None |
| status | BUILD |
| tenant_id | eac1e46e5f7840e39012aff46a92073a |
| updated | 2017-06-02T17:22:24 |
| volume | 1 |
| volume_id | None |
+-------------------------+--------------------------------------+
您可以通过执行以下操作来查看实例上的模块:
$ trove module-query myinst
+-------+------+-----------+---------+--------+-----------+------------------------+------------------------+
| Name | Type | Datastore | Version | Status | Message | Created | Updated |
+-------+------+-----------+---------+--------+-----------+------------------------+------------------------+
| mymod | ping | all | all | OK | Module.V1 | 2017-06-02 17:23:40.50 | 2017-06-02 17:23:40.50 |
+-------+------+-----------+---------+--------+-----------+------------------------+------------------------+
您可以通过执行以下操作来计算每个模块应用的实例:
$ trove module-instance-count mymod
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | True | 1 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
您可以通过执行以下操作列出具有特定模块的实例:
$ trove module-instances mymod
+--------------------------------------+--------+-----------+-------------------+--------+-----------+------+-----------+----------------------------------+
| ID | Name | Datastore | Datastore Version | Status | Flavor ID | Size | Region | Tenant ID |
+--------------------------------------+--------+-----------+-------------------+--------+-----------+------+-----------+----------------------------------+
| 6221b30c-8292-4378-b624-c7e9b0f8ba9e | myinst | mysql | 5.6 | ACTIVE | 15 | 1 | RegionOne | eac1e46e5f7840e39012aff46a92073a |
+--------------------------------------+--------+-----------+-------------------+--------+-----------+------+-----------+----------------------------------+
要更新模块,您应该有另一个文件准备更新模块:
$ echo "message=Module.V2" > ping2.dat
$ trove module-update mymod --file ping2.dat
+----------------------+--------------------------------------+
| Property | Value |
+----------------------+--------------------------------------+
| apply_order | 5 |
| auto_apply | False |
| created | 2017-06-02T17:06:21 |
| datastore | all |
| datastore_id | None |
| datastore_version | all |
| datastore_version_id | None |
| description | None |
| id | 0065a8ed-0668-4db5-a4ad-d88d0a166388 |
| is_admin | True |
| live_update | True |
| md5 | ba7c204979c8de54be6efb70a17d40b9 |
| name | mymod |
| priority_apply | False |
| tenant | eac1e46e5f7840e39012aff46a92073a |
| tenant_id | eac1e46e5f7840e39012aff46a92073a |
| type | ping |
| updated | 2017-06-02T17:56:12 |
| visible | True |
+----------------------+--------------------------------------+
现在展示使用redis集群的用法,创建如下:
$ trove cluster-create myclust redis 3.2.6 \
--instance=flavor=15,volume=1,module=mymod \
--instance=flavor=15,volume=1,module=mymod \
--instance=flavor=15,volume=1,module=mymod
+-------------------+--------------------------------------+
| Property | Value |
+-------------------+--------------------------------------+
| created | 2017-06-02T18:00:17 |
| datastore | redis |
| datastore_version | 3.2.6 |
| id | e4d91ca6-5980-430c-94d0-bf7abc63f712 |
| instance_count | 3 |
| name | myclust |
| task_description | Building the initial cluster. |
| task_name | BUILDING |
| updated | 2017-06-02T18:00:17 |
+-------------------+--------------------------------------+
原来的:command:count命令将显示第一个实例,除非使用了--include_clustered选项。 您可以从每个应用的模块中看到MD5,并且您知道单个实例不是最新的。
$ trove module-instance-count mymod
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
| mymod | 2017-06-02T18:00:18 | 2017-06-02T18:00:18 | ba7c204979c8de54be6efb70a17d40b9 | True | 3 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
再次更新模块。 通过这样做,它将导致实例报告其模块不是最新的。
$ echo "message=Module.V3" > ping3.dat
$ trove module-update mymod --file ping3.dat
+----------------------+--------------------------------------+
| Property | Value |
+----------------------+--------------------------------------+
| apply_order | 5 |
| auto_apply | False |
| created | 2017-06-02T17:06:21 |
| datastore | all |
| datastore_id | None |
| datastore_version | all |
| datastore_version_id | None |
| description | None |
| id | 0065a8ed-0668-4db5-a4ad-d88d0a166388 |
| is_admin | True |
| live_update | True |
| md5 | 869744bdd18e306a96c145df562065ab |
| name | mymod |
| priority_apply | False |
| tenant | eac1e46e5f7840e39012aff46a92073a |
| tenant_id | eac1e46e5f7840e39012aff46a92073a |
| type | ping |
| updated | 2017-06-02T18:06:53 |
| visible | True |
+----------------------+--------------------------------------+
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
| mymod | 2017-06-02T18:00:18 | 2017-06-02T18:00:18 | ba7c204979c8de54be6efb70a17d40b9 | False | 3 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
要更新群集中的实例,可以使用:命令:`trove module-apply`:
$ trove cluster-instances myclust
+--------------------------------------+------------------+-----------+------+--------+
| ID | Name | Flavor ID | Size | Status |
+--------------------------------------+------------------+-----------+------+--------+
| 393462d5-906d-4214-af0d-538b7f618b2d | myclust-member-2 | 15 | 1 | ACTIVE |
| a3fc5326-e1b6-456a-a8b1-08ad6bbb2278 | myclust-member-3 | 15 | 1 | ACTIVE |
| cba31d4b-d038-42c2-ab03-56c6c176b49d | myclust-member-1 | 15 | 1 | ACTIVE |
+--------------------------------------+------------------+-----------+------+--------+
$ trove module-apply 393462d5-906d-4214-af0d-538b7f618b2d mymod
+-------+------+-----------+---------+--------+-----------+
| Name | Type | Datastore | Version | Status | Message |
+-------+------+-----------+---------+--------+-----------+
| mymod | ping | all | all | OK | Module.V3 |
+-------+------+-----------+---------+--------+-----------+
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
| mymod | 2017-06-02T18:00:18 | 2017-06-02T18:00:18 | ba7c204979c8de54be6efb70a17d40b9 | False | 2 |
| mymod | 2017-06-02T18:18:37 | 2017-06-02T18:18:37 | 869744bdd18e306a96c145df562065ab | True | 1 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
对于在例子中体现多样性,请再创建一个实例和模块:
$ trove create myinst_2 15 --size 1 --module mymod
+-------------------------+--------------------------------------+
| Property | Value |
+-------------------------+--------------------------------------+
| created | 2017-06-02T18:21:56 |
| datastore | redis |
| datastore_version | 3.2.6 |
| encrypted_rpc_messaging | True |
| flavor | 15 |
| id | cdd85d94-13a0-4d90-89eb-9c05523d2ac6 |
| name | myinst_2 |
| region | RegionOne |
| server_id | None |
| status | BUILD |
| tenant_id | eac1e46e5f7840e39012aff46a92073a |
| updated | 2017-06-02T18:21:56 |
| volume | 1 |
| volume_id | None |
+-------------------------+--------------------------------------+
$ echo "message=Module.V4" > ping4.dat
$ trove module-update mymod --file ping4.dat
+----------------------+--------------------------------------+
| Property | Value |
+----------------------+--------------------------------------+
| apply_order | 5 |
| auto_apply | False |
| created | 2017-06-02T17:06:21 |
| datastore | all |
| datastore_id | None |
| datastore_version | all |
| datastore_version_id | None |
| description | None |
| id | 0065a8ed-0668-4db5-a4ad-d88d0a166388 |
| is_admin | True |
| live_update | True |
| md5 | 6e2c81c1547d640b4c6e7752ed0e33ab |
| name | mymod |
| priority_apply | False |
| tenant | eac1e46e5f7840e39012aff46a92073a |
| tenant_id | eac1e46e5f7840e39012aff46a92073a |
| type | ping |
| updated | 2017-06-02T18:26:22 |
| visible | True |
+----------------------+--------------------------------------+
现在我们有两个单独的实例,在模块的各种版本上有3个集群实例,没有最新的
$ trove list
+--------------------------------------+----------+-----------+-------------------+--------+-----------+------+-----------+
| ID | Name | Datastore | Datastore Version | Status | Flavor ID | Size | Region |
+--------------------------------------+----------+-----------+-------------------+--------+-----------+------+-----------+
| 6221b30c-8292-4378-b624-c7e9b0f8ba9e | myinst | mysql | 5.6 | ACTIVE | 15 | 1 | RegionOne |
| cdd85d94-13a0-4d90-89eb-9c05523d2ac6 | myinst_2 | redis | 3.2.6 | ACTIVE | 15 | 1 | RegionOne |
+--------------------------------------+----------+-----------+-------------------+--------+-----------+------+-----------+
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
| mymod | 2017-06-02T18:00:18 | 2017-06-02T18:00:18 | ba7c204979c8de54be6efb70a17d40b9 | False | 2 |
| mymod | 2017-06-02T18:18:37 | 2017-06-02T18:21:57 | 869744bdd18e306a96c145df562065ab | False | 2 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
创建最新模块时,未使用--include_clustered。 使用:命令:`trove module-reapply`:
$ trove module-reapply mymod --md5=869744bdd18e306a96c145df562065ab --include_clustered
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
| mymod | 2017-06-02T18:00:18 | 2017-06-02T18:00:18 | ba7c204979c8de54be6efb70a17d40b9 | False | 2 |
| mymod | 2017-06-02T18:38:48 | 2017-06-02T18:38:48 | 6e2c81c1547d640b4c6e7752ed0e33ab | True | 2 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
现在他们都更新了。如果使用--force标志,则可以重新应用已应用的实例。 请注意,唯一更改的是最小和最大更新日期字段。
$ trove module-reapply mymod --md5=6e2c81c1547d640b4c6e7752ed0e33ab --include_clustered --force
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T17:22:25 | 2017-06-02T17:22:25 | 7f700cc7b99606615f8b51946f6d3228 | False | 1 |
| mymod | 2017-06-02T18:00:18 | 2017-06-02T18:00:18 | ba7c204979c8de54be6efb70a17d40b9 | False | 2 |
| mymod | 2017-06-02T18:40:45 | 2017-06-02T18:40:46 | 6e2c81c1547d640b4c6e7752ed0e33ab | True | 2 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
要使每个实例都到当前版本,请使用一些可选参数来控制同时更新多少个实例。 这对于避免潜在的网络问题(如果模块有效负载很大)是有用的。 由于我们没有使用--force标志,最小更新日期不会改变。
$ trove module-reapply mymod --include_clustered --batch_size=1 --delay=3
$ trove module-instance-count mymod --include_clustered
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| Module Name | Min Updated Date | Max Updated Date | Module MD5 | Current | Count |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
| mymod | 2017-06-02T18:40:45 | 2017-06-02T18:44:10 | 6e2c81c1547d640b4c6e7752ed0e33ab | True | 5 |
+-------------+---------------------+---------------------+----------------------------------+---------+-------+
此文章属博客园用户S-tec原创作品,受国家《著作权法》保护,未经许可,任何单位及个人不得做营利性使用;若仅做个人学习、交流等非营利性使用,应当指明作者姓名、作品名称,原文地址,并且不得侵犯作者依法享有的其他权利。
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