I am trying to access gRPC service using REST. I have setup an envoy server; but neither I am able to access envoy admin console nor able to access gRPC service from REST. Please find below envoy-config.yml file.
admin:
access_log_path: /tmp/admin_access.log
address:
socket_address: { address: 0.0.0.0, port_value: 9901 } #1
static_resources:
listeners:
- name: main-listener
address:
socket_address: { address: 0.0.0.0, port_value: 51051 } #2
filter_chains:
- filters:
- name: envoy.http_connection_manager
typed_config:
"@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
stat_prefix: grpc_json
codec_type: AUTO
route_config:
name: local_route
virtual_hosts:
- name: local_service
domains: [ "*" ]
routes:
- match: { prefix: "/" , grpc: { } } # 3a grpc:{} means that requests are only forwarded if they are found in the grpc service definition, returning 404 for others
route: { cluster: grpc-backend-services, timeout: { seconds: 60 } } #3b
http_filters:
- name: envoy.grpc_json_transcoder
# configuration docs: https://github.com/envoyproxy/envoy/blob/master/api/envoy/config/filter/http/transcoder/v2/transcoder.proto
typed_config:
"@type": type.googleapis.com/envoy.extensions.filters.http.grpc_json_transcoder.v3.GrpcJsonTranscoder
proto_descriptor: "/data/reservation_service_definition.pb" #4
services: [ "reservations.v1.ReservationService" ] #5
print_options:
add_whitespace: true
always_print_primitive_fields: true
always_print_enums_as_ints: false
preserve_proto_field_names: false #6
- name: envoy.filters.http.router
typed_config:
"@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
clusters:
- name: grpc-backend-services
type: LOGICAL_DNS
lb_policy: ROUND_ROBIN
dns_lookup_family: V4_ONLY
typed_extension_protocol_options:
envoy.extensions.upstreams.http.v3.HttpProtocolOptions:
"@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions
explicit_http_config:
http2_protocol_options: { }
load_assignment:
cluster_name: grpc
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
# WARNING: "docker.for.mac.localhost" has been deprecated from Docker v18.03.0.
# If you're running an older version of Docker, please use "docker.for.mac.localhost" instead.
# Reference: https://docs.docker.com/docker-for-mac/release-notes/#docker-community-edition-18030-ce-mac59-2018-03-26
address: host.docker.internal
port_value: 9091
The gRPC service is running on port 9091.
envoy container is running
pushpak.mittal@BLRJPT121327LT grpc-server % docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
5a2ec1db0b54 envoyproxy/envoy:dev-6c702f45fadf4abd2f24605e3d9e81c748b13f85 "/docker-entrypoint.…" 42 minutes ago Up 42 minutes envoy
pushpak.mittal@BLRJPT121327LT grpc-server %
My POST request
curl -X POST \
http://localhost:51051/v1/reservations \
-H 'Content-Type: application/json' \
-d '{
"title": "Lunchmeeting2",
"venue": "JDriven Coltbaan 3",
"room": "atrium",
"timestamp": "2018-10-10T11:12:13",
"attendees": [
{
"ssn": "1234567890",
"firstName": "Jimmy",
"lastName": "Jones"
},
{
"ssn": "9999999999",
"firstName": "Dennis",
"lastName": "Richie"
}
]
}'
Response
curl: (7) Failed to connect to localhost port 51051 after 8 ms: Connection refused
pushpak.mittal@BLRJPT121327LT grpc-server %
Docker run command
docker run -it --rm --name envoy --network="host"\
-v "$(pwd)/reservation_service_definition.pb:/data/reservation_service_definition.pb:ro" \
-v "$(pwd)/envoy-config.yml:/etc/envoy/envoy.yaml:ro" \
envoyproxy/envoy:dev-6c702f45fadf4abd2f24605e3d9e81c748b13f85
