nacos

基于 Nacos 的服务发现

当前模块的性能有待改进：

1. 并行发送请求。

Nacos 配置

在文件 conf/config.yaml 中添加以下配置到：

discovery:
  nacos:
    host:
      - "http://${username}:${password}@${host1}:${port1}"
    prefix: "/nacos/v1/"
    fetch_interval: 30    # default 30 sec
    weight: 100           # default 100
    timeout:
      connect: 2000       # default 2000 ms
      send: 2000          # default 2000 ms
      read: 5000          # default 5000 ms

也可以这样简洁配置（未配置项使用默认值）：

discovery:
  nacos:
    host:
      - "http://192.168.33.1:8848"

Upstream 设置

例如，转发 URI 匹配 "/nacos/*" 的请求到一个上游服务， 该服务在 Nacos 中的服务名是 APISIX-NACOS ，查询地址是 http://192.168.33.1:8848/nacos/v1/ns/instance/list?serviceName=APISIX-NACOS ，创建路由时指定服务发现类型为 nacos 。

$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
    "uri": "/nacos/*",
    "upstream": {
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos"
    }
}'

响应如下：

{
  "node": {
    "key": "\/apisix\/routes\/1",
    "value": {
      "id": "1",
      "create_time": 1615796097,
      "status": 1,
      "update_time": 1615799165,
      "upstream": {
        "hash_on": "vars",
        "pass_host": "pass",
        "scheme": "http",
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos"
      },
      "priority": 0,
      "uri": "\/nacos\/*"
    }
  },
  "action": "set"
}

参数

名字	类型	可选项	默认值	有效值	说明
namespace_id	string	可选	public		服务所在的命名空间
group_name	string	可选	DEFAULT_GROUP		服务所在的组

指定命名空间

例如，转发 URI 匹配 "/nacosWithNamespaceId/*" 的请求到一个上游服务， 该服务在 Nacos 中的服务名是 APISIX-NACOS，命名空间是 test_ns，查询地址是 http://192.168.33.1:8848/nacos/v1/ns/instance/list?serviceName=APISIX-NACOS&namespaceId=test_ns ，创建路由时指定服务发现类型为 nacos 。

$ curl http://127.0.0.1:9080/apisix/admin/routes/2 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
    "uri": "/nacosWithNamespaceId/*",
    "upstream": {
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos",
        "discovery_args": {
          "namespace_id": "test_ns"
        }
    }
}'

响应如下：

{
  "node": {
    "key": "\/apisix\/routes\/2",
    "value": {
      "id": "2",
      "create_time": 1615796097,
      "status": 1,
      "update_time": 1615799165,
      "upstream": {
        "hash_on": "vars",
        "pass_host": "pass",
        "scheme": "http",
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos",
        "discovery_args": {
          "namespace_id": "test_ns"
        }
      },
      "priority": 0,
      "uri": "\/nacosWithNamespaceId\/*"
    }
  },
  "action": "set"
}

指定组

例如，转发 URI 匹配 "/nacosWithGroupName/*" 的请求到一个上游服务， 该服务在 Nacos 中的服务名是 APISIX-NACOS，组名是 test_group，查询地址是 http://192.168.33.1:8848/nacos/v1/ns/instance/list?serviceName=APISIX-NACOS&groupName=test_group ，创建路由时指定服务发现类型为 nacos 。

$ curl http://127.0.0.1:9080/apisix/admin/routes/3 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
    "uri": "/nacosWithGroupName/*",
    "upstream": {
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos",
        "discovery_args": {
          "group_name": "test_group"
        }
    }
}'

响应如下：

{
  "node": {
    "key": "\/apisix\/routes\/3",
    "value": {
      "id": "3",
      "create_time": 1615796097,
      "status": 1,
      "update_time": 1615799165,
      "upstream": {
        "hash_on": "vars",
        "pass_host": "pass",
        "scheme": "http",
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos",
        "discovery_args": {
          "group_name": "test_group"
        }
      },
      "priority": 0,
      "uri": "\/nacosWithGroupName\/*"
    }
  },
  "action": "set"
}

同时指定命名空间和组

例如，转发 URI 匹配 "/nacosWithNamespaceIdAndGroupName/*" 的请求到一个上游服务， 该服务在 Nacos 中的服务名是 APISIX-NACOS，命名空间是 test_ns，组名是 test_group，查询地址是 http://192.168.33.1:8848/nacos/v1/ns/instance/list?serviceName=APISIX-NACOS&namespaceId=test_ns&groupName=test_group ，创建路由时指定服务发现类型为 nacos 。

$ curl http://127.0.0.1:9080/apisix/admin/routes/4 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
    "uri": "/nacosWithNamespaceIdAndGroupName/*",
    "upstream": {
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos",
        "discovery_args": {
          "namespace_id": "test_ns",
          "group_name": "test_group"
        }
    }
}'

响应如下：

{
  "node": {
    "key": "\/apisix\/routes\/4",
    "value": {
      "id": "4",
      "create_time": 1615796097,
      "status": 1,
      "update_time": 1615799165,
      "upstream": {
        "hash_on": "vars",
        "pass_host": "pass",
        "scheme": "http",
        "service_name": "APISIX-NACOS",
        "type": "roundrobin",
        "discovery_type": "nacos",
        "discovery_args": {
          "namespace_id": "test_ns",
          "group_name": "test_group"
        }
      },
      "priority": 0,
      "uri": "\/nacosWithNamespaceIdAndGroupName\/*"
    }
  },
  "action": "set"
}