API returns 500 in case network is not found instead of 404

libpod/define/errors.go

@@ -20,6 +20,9 @@ var (
 	// ErrNoSuchVolume indicates the requested volume does not exist
 	ErrNoSuchVolume = errors.New("no such volume")
 
+	// ErrNoSuchNetwork indicates the requested network does not exist
+	ErrNoSuchNetwork = errors.New("network not found")
+
 	// ErrNoSuchExecSession indicates that the requested exec session does
 	// not exist.
 	ErrNoSuchExecSession = errors.New("no such exec session")

pkg/api/handlers/compat/networks.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/containernetworking/cni/libcni"
 	"github.com/containers/podman/v2/libpod"
+	"github.com/containers/podman/v2/libpod/define"
 	"github.com/containers/podman/v2/pkg/api/handlers/utils"
 	"github.com/containers/podman/v2/pkg/domain/entities"
 	"github.com/containers/podman/v2/pkg/domain/infra/abi"
@@ -44,9 +45,7 @@ func InspectNetwork(w http.ResponseWriter, r *http.Request) {
 	name := utils.GetName(r)
 	_, err = network.InspectNetwork(config, name)
 	if err != nil {
-		// TODO our network package does not distinguish between not finding a
-		// specific network vs not being able to read it
-		utils.InternalServerError(w, err)
+		utils.NetworkNotFound(w, name, err)
 		return
 	}
 	report, err := getNetworkResourceByName(name, runtime)
@@ -285,7 +284,7 @@ func RemoveNetwork(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if !exists {
-		utils.Error(w, "network not found", http.StatusNotFound, network.ErrNetworkNotFound)
+		utils.Error(w, "network not found", http.StatusNotFound, define.ErrNoSuchNetwork)
 		return
 	}
 	if err := network.RemoveNetwork(config, name); err != nil {

pkg/api/handlers/libpod/networks.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 
 	"github.com/containers/podman/v2/libpod"
+	"github.com/containers/podman/v2/libpod/define"
 	"github.com/containers/podman/v2/pkg/api/handlers/utils"
 	"github.com/containers/podman/v2/pkg/domain/entities"
 	"github.com/containers/podman/v2/pkg/domain/infra/abi"
-	"github.com/containers/podman/v2/pkg/network"
 	"github.com/gorilla/schema"
 	"github.com/pkg/errors"
 )
@@ -78,7 +78,7 @@ func RemoveNetwork(w http.ResponseWriter, r *http.Request) {
 	}
 	if reports[0].Err != nil {
 		// If the network cannot be found, we return a 404.
-		if errors.Cause(err) == network.ErrNetworkNotFound {
+		if errors.Cause(err) == define.ErrNoSuchNetwork {
 			utils.Error(w, "Something went wrong", http.StatusNotFound, err)
 			return
 		}
@@ -104,7 +104,7 @@ func InspectNetwork(w http.ResponseWriter, r *http.Request) {
 	reports, err := ic.NetworkInspect(r.Context(), []string{name}, options)
 	if err != nil {
 		// If the network cannot be found, we return a 404.
-		if errors.Cause(err) == network.ErrNetworkNotFound {
+		if errors.Cause(err) == define.ErrNoSuchNetwork {
 			utils.Error(w, "Something went wrong", http.StatusNotFound, err)
 			return
 		}

pkg/api/handlers/utils/errors.go

@@ -39,6 +39,7 @@ func VolumeNotFound(w http.ResponseWriter, name string, err error) {
 	msg := fmt.Sprintf("No such volume: %s", name)
 	Error(w, msg, http.StatusNotFound, err)
 }
+
 func ContainerNotFound(w http.ResponseWriter, name string, err error) {
 	if errors.Cause(err) != define.ErrNoSuchCtr {
 		InternalServerError(w, err)
@@ -55,6 +56,14 @@ func ImageNotFound(w http.ResponseWriter, name string, err error) {
 	Error(w, msg, http.StatusNotFound, err)
 }
 
+func NetworkNotFound(w http.ResponseWriter, name string, err error) {
+	if errors.Cause(err) != define.ErrNoSuchNetwork {
+		InternalServerError(w, err)
+	}
+	msg := fmt.Sprintf("No such network: %s", name)
+	Error(w, msg, http.StatusNotFound, err)
+}
+
 func PodNotFound(w http.ResponseWriter, name string, err error) {
 	if errors.Cause(err) != define.ErrNoSuchPod {
 		InternalServerError(w, err)

pkg/network/config.go

@@ -2,7 +2,6 @@ package network
 
 import (
 	"encoding/json"
-	"errors"
 	"net"
 )
 
@@ -20,10 +19,6 @@ const (
 	DefaultPodmanDomainName = "dns.podman"
 )
 
-var (
-	ErrNetworkNotFound = errors.New("network not found")
-)
-
 // GetDefaultPodmanNetwork outputs the default network for podman
 func GetDefaultPodmanNetwork() (*net.IPNet, error) {
 	_, n, err := net.ParseCIDR("10.88.1.0/24")

pkg/network/files.go

@@ -10,6 +10,7 @@ import (
 	"github.com/containernetworking/cni/libcni"
 	"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
 	"github.com/containers/common/pkg/config"
+	"github.com/containers/podman/v2/libpod/define"
 	"github.com/pkg/errors"
 )
 
@@ -55,7 +56,7 @@ func GetCNIConfigPathByName(config *config.Config, name string) (string, error)
 			return confFile, nil
 		}
 	}
-	return "", errors.Wrap(ErrNetworkNotFound, fmt.Sprintf("unable to find network configuration for %s", name))
+	return "", errors.Wrap(define.ErrNoSuchNetwork, fmt.Sprintf("unable to find network configuration for %s", name))
 }
 
 // ReadRawCNIConfByName reads the raw CNI configuration for a CNI

pkg/network/network.go

@@ -8,6 +8,7 @@ import (
 	"github.com/containernetworking/cni/pkg/types"
 	"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
 	"github.com/containers/common/pkg/config"
+	"github.com/containers/podman/v2/libpod/define"
 	"github.com/containers/podman/v2/pkg/util"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -200,7 +201,7 @@ func InspectNetwork(config *config.Config, name string) (map[string]interface{},
 func Exists(config *config.Config, name string) (bool, error) {
 	_, err := ReadRawCNIConfByName(config, name)
 	if err != nil {
-		if errors.Cause(err) == ErrNetworkNotFound {
+		if errors.Cause(err) == define.ErrNoSuchNetwork {
 			return false, nil
 		}
 		return false, err

test/apiv2/35-networks.at

@@ -0,0 +1,8 @@
+# -*- sh -*-
+#
+# network-related tests
+#
+
+t GET /networks/non-existing-network 404
+
+# vim: filetype=sh