CatalogDestinationsOnly is a passthrough that would enable dialing
addresses outside of Consul's catalog. However, when this flag is set to
true only _connect_ endpoints for services can be dialed.
This flag is being renamed to signal that non-Connect endpoints can't be
dialed by transparent proxies when the value is set to true.
Previously if you were to follow these docs and register two external
services, you would set the Address field on the node. The second
registered service would change the address of the node for the first
service.
Now the docs explain the address key and how to register more than one
external service.
* Docs for Unix Domain Sockets
There are a number of cases where a user might wish to either 1)
expose a service through a Unix Domain Socket in the filesystem
('downstream') or 2) connect to an upstream service by a local unix
domain socket (upstream).
As of Consul (1.10-beta2) we've added new syntax and support to configure
the Envoy proxy to support this
To connect to a service via local Unix Domain Socket instead of a
port, add local_bind_socket_path and optionally local_bind_socket_mode
to the upstream config for a service:
upstreams = [
{
destination_name = "service-1"
local_bind_socket_path = "/tmp/socket_service_1"
local_bind_socket_mode = "0700"
...
}
...
]
This will cause Envoy to create a socket with the path and mode
provided, and connect that to service-1
The mode field is optional, and if omitted will use the default mode
for Envoy. This is not applicable for abstract sockets. See
https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/core/v3/address.proto#envoy-v3-api-msg-config-core-v3-pipe
for details
NOTE: These options conflict the local_bind_socket_port and
local_bind_socket_address options. We can bind to an port or we can
bind to a socket, but not both.
To expose a service listening on a Unix Domain socket to the service
mesh use either the 'socket_path' field in the service definition or the
'local_service_socket_path' field in the proxy definition. These
fields are analogous to the 'port' and 'service_port' fields in their
respective locations.
services {
name = "service-2"
socket_path = "/tmp/socket_service_2"
...
}
OR
proxy {
local_service_socket_path = "/tmp/socket_service_2"
...
}
There is no mode field since the service is expected to create the
socket it is listening on, not the Envoy proxy.
Again, the socket_path and local_service_socket_path fields conflict
with address/port and local_service_address/local_service_port
configuration entries.
Set up a simple service mesh with dummy services:
socat -d UNIX-LISTEN:/tmp/downstream.sock,fork UNIX-CONNECT:/tmp/upstream.sock
socat -v tcp-l:4444,fork exec:/bin/cat
services {
name = "sock_forwarder"
id = "sock_forwarder.1"
socket_path = "/tmp/downstream.sock"
connect {
sidecar_service {
proxy {
upstreams = [
{
destination_name = "echo-service"
local_bind_socket_path = "/tmp/upstream.sock"
config {
passive_health_check {
interval = "10s"
max_failures = 42
}
}
}
]
}
}
}
}
services {
name = "echo-service"
port = 4444
connect = { sidecar_service {} }
Kind = "ingress-gateway"
Name = "ingress-service"
Listeners = [
{
Port = 8080
Protocol = "tcp"
Services = [
{
Name = "sock_forwarder"
}
]
}
]
consul agent -dev -enable-script-checks -config-dir=./consul.d
consul connect envoy -sidecar-for sock_forwarder.1
consul connect envoy -sidecar-for echo-service -admin-bind localhost:19001
consul config write ingress-gateway.hcl
consul connect envoy -gateway=ingress -register -service ingress-service -address '{{ GetInterfaceIP "eth0" }}:8888' -admin-bind localhost:19002
netcat 127.0.0.1 4444
netcat 127.0.0.1 8080
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* fixup Unix capitalization
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Update website/content/docs/connect/registration/service-registration.mdx
Co-authored-by: Blake Covarrubias <blake@covarrubi.as>
* Provide examples in hcl and json
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Apply suggestions from code review
Co-authored-by: Blake Covarrubias <blake@covarrubi.as>
* One more fixup for docs
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
Co-authored-by: Blake Covarrubias <blake@covarrubi.as>
This PR adds cluster members to the metrics API. The number of members per
segment are reported as well as the total number of members.
Tested by running a multi-node cluster locally and ensuring the numbers were
correct. Also added unit test coverage to add the new expected gauges to
existing test cases.
Adds more clear indicators that the collections on the learn.hashicorp.com sites have specific instructions for single node deployments.
Co-Authored by: soonoo <qpseh2m7@gmail.com>
* Update glossary.mdx
1. Update header to the first section to "Consul Vocabulary" since these are the terms used in the context of Consul conversations.
2. Kept the header "Consul Glossary" since these are the terms useful for practitioners in the consul space.
3. Removed interlinking to terms on the same page.
Co-authored-by: Hans Hasselberg <me@hans.io>
Co-authored-by: Swarna Podila <swarnap@users.noreply.github.com>
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