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authorMatthew Heon <matthew.heon@gmail.com>2017-12-06 14:03:55 -0500
committerAtomic Bot <atomic-devel@projectatomic.io>2017-12-14 23:59:21 +0000
commit824a648fcb87c112fb498db94b8e39a84ba649bd (patch)
tree518ae544ec07db8c3e59317083a7a5349a0cb806 /libpod/networking.go
parent16237fe067362f73d0ce5699cef9b3b62a45dd3e (diff)
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Add basic functions for dealing with network namespaces
Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #109 Approved by: mheon
Diffstat (limited to 'libpod/networking.go')
-rw-r--r--libpod/networking.go65
1 files changed, 65 insertions, 0 deletions
diff --git a/libpod/networking.go b/libpod/networking.go
new file mode 100644
index 000000000..893d6863a
--- /dev/null
+++ b/libpod/networking.go
@@ -0,0 +1,65 @@
+package libpod
+
+import (
+ "github.com/containernetworking/plugins/pkg/ns"
+ "github.com/cri-o/ocicni/pkg/ocicni"
+ "github.com/sirupsen/logrus"
+)
+
+// Get an OCICNI network config
+func getPodNetwork(id, name, nsPath string, ports []ocicni.PortMappings) ocicni.PodNetwork {
+ return ocicni.PodNetwork{
+ Name: name,
+ Namespace: name, // TODO is there something else we should put here? We don't know about Kube namespaces
+ ID: id,
+ NetNS: nsPath,
+ PortMappings: ports,
+ }
+}
+
+// Create and configure a new network namespace
+func (r *Runtime) createNetNS(id, name string, ports []ocicni.PortMapping) (n ns.NetNS, err error) {
+ ns, err := ns.NewNS()
+ if err != nil {
+ return nil, errors.Wrapf(err, "error creating network namespace %s", id)
+ }
+ defer func() {
+ if err != nil {
+ if err2 := ns.Close(); err2 != nil {
+ logrus.Errorf("Error closing partially created network namespace %s: %v", id, err2)
+ }
+ }
+ }()
+
+ podNetwork := getPodNetwork(id, name, ns.Path(), ports)
+
+ if err := r.netPlugin.SetUpPod(podNetwork); err != nil {
+ return nil, errors.Wrapf(err, "error configuring network namespace %s", id)
+ }
+
+ // TODO hostport mappings for forwarded ports
+
+ return ns, nil
+}
+
+// Join an existing network namespace
+func joinNetNS(path string) (ns.NetNS, error) {
+ ns, err := ns.GetNS(path)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error retrieving network namespace at %s", path)
+ }
+
+ return ns, nil
+}
+
+// Tear down a network namespace
+func (r *Runtime) teardownNetNS(id, name string, ports []ocicni.PortMapping, ns ns.NetNS) error {
+ // TODO hostport mappings for forwarded ports should be undone
+ podNetwork := getPodNetwork(id, name, ns.Path(), ports)
+
+ if err := r.netPlugin.TearDownPod(podNetwork); err != nil {
+ return errors.Wrapf(err, "failed to remove network namespace %s", id)
+ }
+
+ return nil
+}