微服务租户隔离架构设计

微服务租户隔离架构设计

1. Linkis在Gateway进行服务转发时是基于ribbon进行负载均衡的，但是有些情况下存在一些重要业务的任务希望做到服务级别的隔离，如果基于ribbon进行服务在均衡就会存在问题。比如租户A希望他的任务都路由到特定的Linkis-CG-Entrance服务，这样当其他的实例出现异常时可以不会影响到A服务的Entrance。另外支持服务的租户及隔离也可以做到快速隔离某个异常服务，支持灰度升级等场景。

支持通过解析请求的标签按照路由标签对服务进行转发
支持服务的标签注册和修改

此次特性新增主要修改点位linkis-mg-gateway和instance-label两个模块，设计到新增Gateway的转发逻辑，以及instance-label支持服务和标签的注册。

整体技术架构主要修改点位RestFul请求需要带上路由标签等标签参数信息，然后在Gateway进行转发时会解析对应的标签完成接口的路由转发。整体如下图所示

几点说明：

如果存在多个对应的服务打上了同一个roteLabel则随机转发
如果对应的routeLabel没有对应的服务，则接口直接失败
如果接口没有routeLabel则基于原有的转发逻辑，不会路由到打上了特定标签的服务

此次的特性主要是为了完成Restful租户隔离转发功能。功能点设计的模块如下：

组件名	一级模块	二级模块	功能点
Linkis	MG	Gateway	解析restful请求参数中的路由标签，完成接口按照路由标签的转发功能
Linkis	PS	InstanceLabel	InstanceLabel服务，完成服务和标签的关联

[输入端] 输入端为请求Gatway的restful请求，且是参数中待用roure label的请求才会进行处理
[处理流程] Gateway会判断请求是否带有对应的RouteLabel，如果存在则基于RouteLabel来进行转发。调用时序图如下：

1. DROP TABLE IF EXISTS `linkis_ps_instance_label`;
2. CREATE TABLE `linkis_ps_instance_label` (
3. `id` int(20) NOT NULL AUTO_INCREMENT,
4. `label_key` varchar(32) COLLATE utf8_bin NOT NULL COMMENT 'string key',
5. `label_value` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'string value',
6. `label_feature` varchar(16) COLLATE utf8_bin NOT NULL COMMENT 'store the feature of label, but it may be redundant',
7. `label_value_size` int(20) NOT NULL COMMENT 'size of key -> value map',
8. `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT 'update unix timestamp',
9. `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT 'update unix timestamp',
10. PRIMARY KEY (`id`),
11. UNIQUE KEY `label_key_value` (`label_key`,`label_value`)
12. ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

14. DROP TABLE IF EXISTS `linkis_ps_instance_info`;
15. CREATE TABLE `linkis_ps_instance_info` (
16. `id` int(11) NOT NULL AUTO_INCREMENT,
17. `instance` varchar(128) COLLATE utf8_bin DEFAULT NULL COMMENT 'structure like ${host|machine}:${port}',
18. `name` varchar(128) COLLATE utf8_bin DEFAULT NULL COMMENT 'equal application name in registry',
19. `update_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT 'update unix timestamp',
20. `create_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT 'create unix timestamp',
21. PRIMARY KEY (`id`),
22. UNIQUE KEY `instance` (`instance`)
23. ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

25. DROP TABLE IF EXISTS `linkis_ps_instance_label_relation`;
26. CREATE TABLE `linkis_ps_instance_label_relation` (
27. `id` int(20) NOT NULL AUTO_INCREMENT,
28. `label_id` int(20) DEFAULT NULL COMMENT 'id reference linkis_ps_instance_label -> id',
29. `service_instance` varchar(128) NOT NULL COLLATE utf8_bin COMMENT 'structure like ${host|machine}:${port}',
30. `update_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT 'update unix timestamp',
31. `create_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT 'create unix timestamp',
32. PRIMARY KEY (`id`)
33. ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

1. echo "spring.eureka.instance.metadata-map.route=et1" >> $LINKIS_CONF_DIR/linkis-cg-entrance.properties
2. sh  $LINKIS_HOME/sbin/linkis-damemon.sh restart cg-entrance

submit task:

1. url:/api/v1/entrance/submit
2. {
3. "executionContent": {"code": "echo 1", "runType":  "shell"},
4. "params": {"variable": {}, "configuration": {}},
5. "source":  {"scriptPath": "ip"},
6. "labels": {
7. "engineType": "shell-1",
8. "userCreator": "peacewong-IDE",
9. "route": "et1"
10. }
11. }

will be routed to a fixed service：

1. {
2. "method": "/api/entrance/submit",
3. "status": 0,
4. "message": "OK",
5. "data": {
6. "taskID": 45158,
7. "execID": "exec_id018030linkis-cg-entrancelocalhost:9205IDE_peacewong_shell_0"
8. }
9. }

or linkis-cli:

1. sh bin/linkis-cli -submitUser  hadoop  -engineType shell-1 -codeType shell  -code "whoami" -labelMap route=et1 --gatewayUrl http://127.0.0.1:9101

submit task:

1. url:/api/v1/entrance/submit
2. {
3. "executionContent": {"code": "echo 1", "runType":  "shell"},
4. "params": {"variable": {}, "configuration": {}},
5. "source":  {"scriptPath": "ip"},
6. "labels": {
7. "engineType": "shell-1",
8. "userCreator": "peacewong-IDE",
9. "route": "et1"
10. }
11. }

will get the error

1. {
2. "method": "/api/rest_j/v1/entrance/submit",
3. "status": 1,
4. "message": "GatewayErrorException: errCode: 11011 ,desc: Cannot route to the corresponding service, URL: /api/rest_j/v1/entrance/submit RouteLabel: [{\"stringValue\":\"et2\",\"labelKey\":\"route\",\"feature\":null,\"modifiable\":true,\"featureKey\":\"feature\",\"empty\":false}] ,ip: localhost ,port: 9101 ,serviceKind: linkis-mg-gateway",
5. "data": {
6. "data": "{\r\n    \"executionContent\": {\"code\": \"echo 1\", \"runType\":  \"shell\"},\r\n    \"params\": {\"variable\": {}, \"configuration\": {}},\r\n    \"source\":  {\"scriptPath\": \"ip\"},\r\n    \"labels\": {\r\n        \"engineType\": \"shell-1\",\r\n        \"userCreator\": \"peacewong-IDE\",\r\n        \"route\": \"et2\"\r\n    }\r\n}"
7. }
8. }

submit task:

1. url:/api/v1/entrance/submit
2. {
3. "executionContent": {"code": "echo 1", "runType":  "shell"},
4. "params": {"variable": {}, "configuration": {}},
5. "source":  {"scriptPath": "ip"},
6. "labels": {
7. "engineType": "shell-1",
8. "userCreator": "peacewong-IDE"
9. }
10. }

2. will route to untagged entranceservices
3. {
4. "method": "/api/entrance/submit",
5. "status": 0,
6. "message": "OK",
7. "data": {
8. "taskID": 45159,
9. "execID": "exec_id018018linkis-cg-entrancelocalhost2:9205IDE_peacewong_shell_0"
10. }
11. }

不涉及安全问题，restful需要登录认证

对Gateway转发性能影响较小，有缓存相应的label和instance的数据

不涉及