Adding network filter to docker ps command

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>

daemon/list.go

@@ -33,6 +33,7 @@ var acceptedPsFilterTags = map[string]bool{
 	"status":    true,
 	"since":     true,
 	"volume":    true,
+	"network":   true,
 }
 
 // iterationAction represents possible outcomes happening during the container iteration.
@@ -374,6 +375,19 @@ func includeContainerInList(container *container.Container, ctx *listContext) it
 		}
 	}
 
+	networkExist := fmt.Errorf("container part of network")
+	if ctx.filters.Include("network") {
+		err := ctx.filters.WalkValues("network", func(value string) error {
+			if network := container.NetworkSettings.Networks[value]; network != nil {
+				return networkExist
+			}
+			return nil
+		})
+		if err != networkExist {
+			return excludeContainer
+		}
+	}
+
 	return includeContainer
 }
 

docs/reference/api/docker_remote_api.md

@@ -117,6 +117,7 @@ This section lists each version from latest to oldest.  Each listing includes a
 * `POST /containers/create` now takes `StorageOpt` field.
 * `GET /info` now returns `SecurityOptions` field, showing if `apparmor`, `seccomp`, or `selinux` is supported.
 * `GET /networks` now supports filtering by `label` and `driver`.
+* `GET /containers/json` now supports filtering containers by `network` name.
 * `POST /containers/create` now takes `MaximumIOps` and `MaximumIOBps` fields. Windows daemon only.
 * `POST /containers/create` now returns an HTTP 400 "bad parameter" message
   if no command is specified (instead of an HTTP 500 "server error")

docs/reference/api/docker_remote_api_v1.24.md

@@ -223,6 +223,7 @@ Query Parameters:
   -   `before`=(`<container id>` or `<container name>`)
   -   `since`=(`<container id>` or `<container name>`)
   -   `volume`=(`<volume name>` or `<mount point destination>`)
+  -   `network`=(`<network name>`)
 
 Status Codes:
 

docs/reference/commandline/ps.md

@@ -62,7 +62,7 @@ The currently supported filters are:
 * since (container's id or name) - filters containers created since given id or name
 * isolation (default|process|hyperv)   (Windows daemon only)
 * volume (volume name or mount point) - filters containers that mount volumes.
-
+* network (network name) - filters containers connected to the provided network name
 
 #### Label
 
@@ -207,6 +207,17 @@ The `volume` filter shows only containers that mount a specific volume or have a
     CONTAINER ID        MOUNTS
     9c3527ed70ce        remote-volume
 
+#### Network
+
+The `network` filter shows only containers that has endpoints on the provided network name.
+
+    $docker run -d --net=net1 --name=test1 ubuntu top
+    $docker run -d --net=net2 --name=test2 ubuntu top
+
+    $docker ps --filter network=net1
+    CONTAINER ID        IMAGE       COMMAND       CREATED             STATUS              PORTS               NAMES
+    9d4893ed80fe        ubuntu      "top"         10 minutes ago      Up 10 minutes                           test1
+
 
 ## Formatting
 

integration-cli/docker_cli_ps_test.go

@@ -804,3 +804,40 @@ func (s *DockerSuite) TestPsFormatSize(c *check.C) {
 	lines = strings.Split(out, "\n")
 	c.Assert(lines[8], checker.HasPrefix, "size:", check.Commentf("Size should be appended on a newline"))
 }
+
+func (s *DockerSuite) TestPsListContainersFilterNetwork(c *check.C) {
+	// create a container
+	out, _ := runSleepingContainer(c, "--net=bridge", "--name=onbridgenetwork")
+	out, _ = runSleepingContainer(c, "--net=none", "--name=onnonenetwork")
+
+	// Filter docker ps on network bridge
+	out, _ = dockerCmd(c, "ps", "--filter", "network=bridge")
+	containerOut := strings.TrimSpace(string(out))
+
+	lines := strings.Split(containerOut, "\n")
+
+	// skip header
+	lines = lines[1:]
+
+	// ps output should have only one container
+	c.Assert(lines, checker.HasLen, 1)
+
+	// Making sure onbridgenetwork is on the output
+	c.Assert(lines[0], checker.Contains, "onbridgenetwork", check.Commentf("Missing the container on network\n"))
+
+	// Filter docker ps on networks bridge and none
+	out, _ = dockerCmd(c, "ps", "--filter", "network=bridge", "--filter", "network=none")
+	containerOut = strings.TrimSpace(string(out))
+
+	lines = strings.Split(containerOut, "\n")
+
+	// skip header
+	lines = lines[1:]
+
+	//ps output should have both the containers
+	c.Assert(lines, checker.HasLen, 2)
+
+	// Making sure onbridgenetwork and onnonenetwork is on the output
+	c.Assert(lines[0], checker.Contains, "onnonenetwork", check.Commentf("Missing the container on none network\n"))
+	c.Assert(lines[1], checker.Contains, "onbridgenetwork", check.Commentf("Missing the container on bridge network\n"))
+}

man/docker-ps.1.md

@@ -36,6 +36,7 @@ the running containers.
    - since=(<container-name>|<container-id>)
    - ancestor=(<image-name>[:tag]|<image-id>|<image@digest>) - containers created from an image or a descendant.
    - volume=(<volume-name>|<mount-point-destination>)
+   - network=(<network-name>) - containers connected to the provided network name
 
 **--format**="*TEMPLATE*"
    Pretty-print containers using a Go template.