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[feature] Add support (and documentation) for consul mesh gateways #9446
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stage/accepted
Confirmed, and intend to work on. No timeline committment though.
theme/consul/connect
Consul Connect integration
type/enhancement
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shoenig
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May 25, 2021
This PR implements first-class support for Nomad running Consul Connect Mesh Gateways. Mesh gateways enable services in the Connect mesh to make cross-DC connections via gateways, where each datacenter may not have full node interconnectivity. Consul docs with more information: https://www.consul.io/docs/connect/gateways/mesh-gateway The following group level service block can be used to establish a Connect mesh gateway. service { connect { gateway { mesh { // no configuration } } } } Services can make use of a mesh gateway by configuring so in their upstream blocks, e.g. service { connect { sidecar_service { proxy { upstreams { destination_name = "<service>" local_bind_port = <port> datacenter = "<datacenter>" mesh_gateway { mode = "<mode>" } } } } } } Typical use of a mesh gateway is to create a bridge between datacenters. A mesh gateway should then be configured with a service port that is mapped from a host_network configured on a WAN interface in Nomad agent config, e.g. client { host_network "public" { interface = "eth1" } } Create a port mapping in the group.network block for use by the mesh gateway service from the public host_network, e.g. network { mode = "bridge" port "mesh_wan" { host_network = "public" } } Use this port label for the service.port of the mesh gateway, e.g. service { name = "mesh-gateway" port = "mesh_wan" connect { gateway { mesh {} } } } Currently Envoy is the only supported gateway implementation in Consul. By default Nomad client will run the latest official Envoy docker image supported by the local Consul agent. The Envoy task can be customized by setting `meta.connect.gateway_image` in agent config or by setting the `connect.sidecar_task` block. Gateways require Consul 1.8.0+, enforced by the Nomad scheduler. Closes #9446
shoenig
added a commit
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May 25, 2021
This PR implements first-class support for Nomad running Consul Connect Mesh Gateways. Mesh gateways enable services in the Connect mesh to make cross-DC connections via gateways, where each datacenter may not have full node interconnectivity. Consul docs with more information: https://www.consul.io/docs/connect/gateways/mesh-gateway The following group level service block can be used to establish a Connect mesh gateway. service { connect { gateway { mesh { // no configuration } } } } Services can make use of a mesh gateway by configuring so in their upstream blocks, e.g. service { connect { sidecar_service { proxy { upstreams { destination_name = "<service>" local_bind_port = <port> datacenter = "<datacenter>" mesh_gateway { mode = "<mode>" } } } } } } Typical use of a mesh gateway is to create a bridge between datacenters. A mesh gateway should then be configured with a service port that is mapped from a host_network configured on a WAN interface in Nomad agent config, e.g. client { host_network "public" { interface = "eth1" } } Create a port mapping in the group.network block for use by the mesh gateway service from the public host_network, e.g. network { mode = "bridge" port "mesh_wan" { host_network = "public" } } Use this port label for the service.port of the mesh gateway, e.g. service { name = "mesh-gateway" port = "mesh_wan" connect { gateway { mesh {} } } } Currently Envoy is the only supported gateway implementation in Consul. By default Nomad client will run the latest official Envoy docker image supported by the local Consul agent. The Envoy task can be customized by setting `meta.connect.gateway_image` in agent config or by setting the `connect.sidecar_task` block. Gateways require Consul 1.8.0+, enforced by the Nomad scheduler. Closes #9446
shoenig
added a commit
that referenced
this issue
May 25, 2021
This PR implements first-class support for Nomad running Consul Connect Mesh Gateways. Mesh gateways enable services in the Connect mesh to make cross-DC connections via gateways, where each datacenter may not have full node interconnectivity. Consul docs with more information: https://www.consul.io/docs/connect/gateways/mesh-gateway The following group level service block can be used to establish a Connect mesh gateway. service { connect { gateway { mesh { // no configuration } } } } Services can make use of a mesh gateway by configuring so in their upstream blocks, e.g. service { connect { sidecar_service { proxy { upstreams { destination_name = "<service>" local_bind_port = <port> datacenter = "<datacenter>" mesh_gateway { mode = "<mode>" } } } } } } Typical use of a mesh gateway is to create a bridge between datacenters. A mesh gateway should then be configured with a service port that is mapped from a host_network configured on a WAN interface in Nomad agent config, e.g. client { host_network "public" { interface = "eth1" } } Create a port mapping in the group.network block for use by the mesh gateway service from the public host_network, e.g. network { mode = "bridge" port "mesh_wan" { host_network = "public" } } Use this port label for the service.port of the mesh gateway, e.g. service { name = "mesh-gateway" port = "mesh_wan" connect { gateway { mesh {} } } } Currently Envoy is the only supported gateway implementation in Consul. By default Nomad client will run the latest official Envoy docker image supported by the local Consul agent. The Envoy task can be customized by setting `meta.connect.gateway_image` in agent config or by setting the `connect.sidecar_task` block. Gateways require Consul 1.8.0+, enforced by the Nomad scheduler. Closes #9446
shoenig
added a commit
that referenced
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Jun 4, 2021
This PR implements first-class support for Nomad running Consul Connect Mesh Gateways. Mesh gateways enable services in the Connect mesh to make cross-DC connections via gateways, where each datacenter may not have full node interconnectivity. Consul docs with more information: https://www.consul.io/docs/connect/gateways/mesh-gateway The following group level service block can be used to establish a Connect mesh gateway. service { connect { gateway { mesh { // no configuration } } } } Services can make use of a mesh gateway by configuring so in their upstream blocks, e.g. service { connect { sidecar_service { proxy { upstreams { destination_name = "<service>" local_bind_port = <port> datacenter = "<datacenter>" mesh_gateway { mode = "<mode>" } } } } } } Typical use of a mesh gateway is to create a bridge between datacenters. A mesh gateway should then be configured with a service port that is mapped from a host_network configured on a WAN interface in Nomad agent config, e.g. client { host_network "public" { interface = "eth1" } } Create a port mapping in the group.network block for use by the mesh gateway service from the public host_network, e.g. network { mode = "bridge" port "mesh_wan" { host_network = "public" } } Use this port label for the service.port of the mesh gateway, e.g. service { name = "mesh-gateway" port = "mesh_wan" connect { gateway { mesh {} } } } Currently Envoy is the only supported gateway implementation in Consul. By default Nomad client will run the latest official Envoy docker image supported by the local Consul agent. The Envoy task can be customized by setting `meta.connect.gateway_image` in agent config or by setting the `connect.sidecar_task` block. Gateways require Consul 1.8.0+, enforced by the Nomad scheduler. Closes #9446
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Labels
stage/accepted
Confirmed, and intend to work on. No timeline committment though.
theme/consul/connect
Consul Connect integration
type/enhancement
Similar to #8294, add builtin support for Consul Connect Mesh Gateways in Nomad.
https://www.consul.io/docs/connect/gateways/mesh-gateway
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