使用RBAC网络筛选器阻止Envoy代理中服务的进/出

时间:2018-09-25 19:29:41

标签: kubernetes envoyproxy

我想尝试在Envoy代理中配置一个过滤器,以基于某些IP,主机名,路由表等阻止对该服务的进出。

我已经搜索了文档,看到了可能。但没有得到任何使用实例。

有人可以指出如何做到这一点的例子吗?

我发现了这样的东西:

network_filters:
   - name: service-access
     config: 
        rules: 
           action: ALLOW
           policies:
             "service-access":
                 principals:
                    source_ip: 192.168.135.211
                 permissions:
                    - destination_ip: 0.0.0.0
                    - destination_port: 443

但是我无法应用此网络过滤器。所有配置都会给我配置错误。

2 个答案:

答案 0 :(得分:0)

我会推荐Istio。您可以设置一个Rule,以拒绝所有不是源自192.168.0.1 IP的流量。

apiVersion: "config.istio.io/v1alpha2"
kind: denier
metadata:
  name: denyreviewsv3handler
spec:
  status:
    code: 7
    message: Not allowed
---
apiVersion: "config.istio.io/v1alpha2"
kind: checknothing
metadata:
  name: denyreviewsv3request
spec:
---
apiVersion: "config.istio.io/v1alpha2"
kind: rule
metadata:
  name: denyreviewsv3
spec:
  match: source.ip != ip("192.168.0.1")
  actions:
  - handler: denyreviewsv3handler.denier
    instances: [ denyreviewsv3request.checknothing ]

您可以匹配Attribute Vocabulary中指定的其他属性,例如,块curl命令match: match(request.headers["user-agent"], "curl*")

有关Traffic ManagementDenials and White/Black Listing的更多信息,请参见Istio文档。 我也可以向您推荐istio-workshop发布的szihai

答案 1 :(得分:0)

这是特使团队在他们的guthub问题中提供给我的完整rbac过滤器配置。尚未测试过。

static_resources:
      listeners:
      - name: "ingress listener"
        address:
          socket_address:
            address: 0.0.0.0
            port_value: 9001
        filter_chains:
          filters:
          - name: envoy.http_connection_manager
            config:
              codec_type: auto
              stat_prefix: ingress_http
              route_config:
                name: local_route
                virtual_hosts:
                - name: local_service
                  domains:
                  - "*"
                  routes:
                  - match:
                      prefix: "/"  
                    route:
                      cluster: local_service
                    per_filter_config:
                      envoy.filters.http.rbac:
                        rbac:
                          rules:
                            action: ALLOW
                            policies:
                              "per-route-rule":
                                permissions:
                                - any: true
                                principals:
                                - any: true
              http_filters:
              - name: envoy.filters.http.rbac 
                config: 
                  rules: 
                    action: ALLOW
                    policies:
                      "general-rules":
                        permissions:
                        - any: true
                        principals:
                        - any: true
              - name: envoy.router
                config: {}
              access_log:
                name: envoy.file_access_log
                config: {path: /dev/stdout}

      clusters:
      - name: local_service
        connect_timeout: 0.250s
        type: static
        lb_policy: round_robin
        http2_protocol_options: {}
        hosts:
        - socket_address:
            address: 127.0.0.1
            port_value: 9000

    admin:
      access_log_path: "/dev/null"
      address:
        socket_address:
          address: 0.0.0.0
          port_value: 8080