add network prune

add the ability to prune unused cni networks.  filters are not implemented
but included both compat and podman api endpoints.

Fixes :#8673

Signed-off-by: baude <bbaude@redhat.com>

4 files changed, 96 insertions, 13 deletions

diff --git a/pkg/api/handlers/compat/networks.go b/pkg/api/handlers/compat/networks.go
index f0b922885..f7a70816f 100644
--- a/pkg/api/handlers/compat/networks.go
+++ b/pkg/api/handlers/compat/networks.go
@@ -388,3 +388,25 @@ func Disconnect(w http.ResponseWriter, r *http.Request) {
 	}
 	utils.WriteResponse(w, http.StatusOK, "OK")
 }
+
+// Prune removes unused networks
+func Prune(w http.ResponseWriter, r *http.Request) {
+	// TODO Filters are not implemented
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	ic := abi.ContainerEngine{Libpod: runtime}
+	pruneOptions := entities.NetworkPruneOptions{}
+	pruneReports, err := ic.NetworkPrune(r.Context(), pruneOptions)
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+		return
+	}
+	var prunedNetworks []string //nolint
+	for _, pr := range pruneReports {
+		if pr.Error != nil {
+			logrus.Error(pr.Error)
+			continue
+		}
+		prunedNetworks = append(prunedNetworks, pr.Name)
+	}
+	utils.WriteResponse(w, http.StatusOK, prunedNetworks)
+}
diff --git a/pkg/api/handlers/compat/swagger.go b/pkg/api/handlers/compat/swagger.go
index 0a514822b..1d1f1ecf2 100644
--- a/pkg/api/handlers/compat/swagger.go
+++ b/pkg/api/handlers/compat/swagger.go
@@ -77,3 +77,10 @@ type swagCompatNetworkDisconnectRequest struct {
 	// in:body
 	Body struct{ types.NetworkDisconnect }
 }
+
+// Network prune
+// swagger:response NetworkPruneResponse
+type swagCompatNetworkPruneResponse struct {
+	// in:body
+	Body []string
+}
diff --git a/pkg/api/handlers/libpod/networks.go b/pkg/api/handlers/libpod/networks.go
index d3bf06988..998f89d96 100644
--- a/pkg/api/handlers/libpod/networks.go
+++ b/pkg/api/handlers/libpod/networks.go
@@ -175,3 +175,17 @@ func ExistsNetwork(w http.ResponseWriter, r *http.Request) {
 	}
 	utils.WriteResponse(w, http.StatusNoContent, "")
 }
+
+// Prune removes unused networks
+func Prune(w http.ResponseWriter, r *http.Request) {
+	// TODO Filters are not implemented
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	ic := abi.ContainerEngine{Libpod: runtime}
+	pruneOptions := entities.NetworkPruneOptions{}
+	pruneReports, err := ic.NetworkPrune(r.Context(), pruneOptions)
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+		return
+	}
+	utils.WriteResponse(w, http.StatusOK, pruneReports)
+}
diff --git a/pkg/api/server/register_networks.go b/pkg/api/server/register_networks.go
index 3d9e7fb89..d3345d8da 100644
--- a/pkg/api/server/register_networks.go
+++ b/pkg/api/server/register_networks.go
@@ -9,19 +9,6 @@ import (
 )
 
 func (s *APIServer) registerNetworkHandlers(r *mux.Router) error {
-	// swagger:operation POST /networks/prune compat compatPruneNetwork
-	// ---
-	// tags:
-	// - networks (compat)
-	// Summary: Delete unused networks
-	// description: Not supported
-	// produces:
-	// - application/json
-	// responses:
-	//   404:
-	//     $ref: "#/responses/NoSuchNetwork"
-	r.HandleFunc(VersionedPath("/networks/prune"), compat.UnsupportedHandler).Methods(http.MethodPost)
-	r.HandleFunc("/networks/prune", compat.UnsupportedHandler).Methods(http.MethodPost)
 	// swagger:operation DELETE /networks/{name} compat compatRemoveNetwork
 	// ---
 	// tags:
@@ -172,6 +159,35 @@ func (s *APIServer) registerNetworkHandlers(r *mux.Router) error {
 	//     $ref: "#/responses/InternalError"
 	r.HandleFunc(VersionedPath("/networks/{name}/disconnect"), s.APIHandler(compat.Disconnect)).Methods(http.MethodPost)
 	r.HandleFunc("/networks/{name}/disconnect", s.APIHandler(compat.Disconnect)).Methods(http.MethodPost)
+	// swagger:operation POST /networks/prune compat compatPruneNetwork
+	// ---
+	// tags:
+	//  - networks (compat)
+	// summary: Delete unused networks
+	// description: Remove CNI networks that do not have containers
+	// produces:
+	// - application/json
+	// parameters:
+	//  - in: query
+	//    name: filters
+	//    type: string
+	//    description: |
+	//      NOT IMPLEMENTED
+	//      Filters to process on the prune list, encoded as JSON (a map[string][]string).
+	//      Available filters:
+	//        - until=<timestamp> Prune networks created before this timestamp. The <timestamp> can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. 10m, 1h30m) computed relative to the daemon machine’s time.
+	//	      - label (label=<key>, label=<key>=<value>, label!=<key>, or label!=<key>=<value>) Prune networks with (or without, in case label!=... is used) the specified labels.
+	// responses:
+	//   200:
+	//     description: OK
+	//     schema:
+	//       type: array
+	//       items:
+	//         type: string
+	//   500:
+	//     $ref: "#/responses/InternalError"
+	r.HandleFunc(VersionedPath("/networks/prune"), s.APIHandler(compat.Prune)).Methods(http.MethodPost)
+	r.HandleFunc("/networks/prune", s.APIHandler(compat.Prune)).Methods(http.MethodPost)
 
 	// swagger:operation DELETE /libpod/networks/{name} libpod libpodRemoveNetwork
 	// ---
@@ -353,5 +369,29 @@ func (s *APIServer) registerNetworkHandlers(r *mux.Router) error {
 	//   500:
 	//     $ref: "#/responses/InternalError"
 	r.HandleFunc(VersionedPath("/libpod/networks/{name}/disconnect"), s.APIHandler(compat.Disconnect)).Methods(http.MethodPost)
+	// swagger:operation POST /libpod/networks/prune libpod libpodPruneNetwork
+	// ---
+	// tags:
+	//  - networks
+	// summary: Delete unused networks
+	// description: Remove CNI networks that do not have containers
+	// produces:
+	// - application/json
+	// parameters:
+	//  - in: query
+	//    name: filters
+	//    type: string
+	//    description: |
+	//      NOT IMPLEMENTED
+	//      Filters to process on the prune list, encoded as JSON (a map[string][]string).
+	//      Available filters:
+	//        - until=<timestamp> Prune networks created before this timestamp. The <timestamp> can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. 10m, 1h30m) computed relative to the daemon machine’s time.
+	//	      - label (label=<key>, label=<key>=<value>, label!=<key>, or label!=<key>=<value>) Prune networks with (or without, in case label!=... is used) the specified labels.
+	// responses:
+	//   200:
+	//     $ref: "#/responses/NetworkPruneResponse"
+	//   500:
+	//     $ref: "#/responses/InternalError"
+	r.HandleFunc(VersionedPath("/libpod/networks/prune"), s.APIHandler(libpod.Prune)).Methods(http.MethodPost)
 	return nil
 }