added node ip autodetection

Manager now auto-detects the address that an agent connects to the cluster
from and stores it. This is useful for many kinds of internal cluster
management tools.

Signed-off-by: Drew Erny <drew.erny@docker.com>
Upstream-commit: 9bcf623719104fbd196ab0ca14af48f790980499
Component: engine

components/engine/docs/reference/api/docker_remote_api.md

@@ -163,6 +163,7 @@ This section lists each version from latest to oldest.  Each listing includes a
 * Every API response now includes a `Docker-Experimental` header specifying if experimental features are enabled (value can be `true` or `false`).
 * The `hostConfig` option now accepts the fields `CpuRealtimePeriod` and `CpuRtRuntime` to allocate cpu runtime to rt tasks when `CONFIG_RT_GROUP_SCHED` is enabled in the kernel.
 * The `SecurityOptions` field within the `GET /info` response now includes `userns` if user namespaces are enabled in the daemon.
+* `GET /nodes` and `GET /node/(id or name)` now return `Addr` as part of a node's `Status`, which is the address that that node connects to the manager from.
 
 ### v1.24 API changes
 

components/engine/docs/reference/api/docker_remote_api_v1.25.md

@@ -4464,7 +4464,8 @@ List nodes
           }
         },
         "Status": {
-          "State": "ready"
+          "State": "ready",
+          "Addr": "172.17.0.2"
         },
         "ManagerStatus": {
           "Leader": true,
@@ -4555,7 +4556,8 @@ Return low-level information on the node `id`
         }
       },
       "Status": {
-        "State": "ready"
+        "State": "ready",
+        "Addr": "172.17.0.2"
       },
       "ManagerStatus": {
         "Leader": true,