envoyを試す

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docker run \
    -d -p 8080:8080 -p :9901 \
    --name envoy \
    --net mynet \
    --rm \
    -v ~/envoy/envoy.yaml:/etc/envoy/envoy.yaml \
    envoyproxy/envoy:v1.9.0

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admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address: { address: 0.0.0.0, port_value: 9901 }
static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address: { address: 0.0.0.0,  port_value: 8080 }
    filter_chains:
    - filters:
      - name: envoy.http_connection_manager
        config:
          stat_prefix: ingress_http
          http_filters:
          - name: envoy.router
          route_config:
            name: route
            virtual_hosts:
            - name: keycloak_service
              domains: ["*"]
              routes:
              - match:
                  prefix: "/"
                route:
                  cluster: keycloak_cluster
          access_log:
          - name: envoy.file_access_log
            config:
              path: /tmp/access.log
  clusters:
  - name: keycloak_cluster
    type: STRICT_DNS
    connect_timeout: 0.25s
    lb_policy: ROUND_ROBIN
    load_assignment:
      cluster_name: keycloak_cluster
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address: { address: keycloak-1, port_value: 8080 }
        - endpoint:
            address:
              socket_address: { address: keycloak-2, port_value: 8080 }