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authorAdrian Reber <areber@redhat.com>2018-12-11 16:27:05 +0000
committerAdrian Reber <adrian@lisas.de>2019-01-09 07:34:57 +0100
commit2553dad766afef1ff36d610a95a5f1a22450d5c3 (patch)
treec469b7b3e0db4225a15200dad22ab3a77a65a40c
parentab8e03b3e7b682263d72ca53d31a059c7259320d (diff)
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Use existing interface to request IP address during restore
The initial implementation to request the same IP address for a container during a restore was based on environment variables influencing CNI. With this commit the IP address selection switches to Podman's internal static IP API. This commit does a comment change in libpod/container_easyjson.go to avoid unnecessary re-generation of libpod/container_easyjson.go during build as this fails in CI. The reason for this is that make sees that libpod/container_easyjson.go needs to be re-created. The commit, however, only changes a part of libpod/container.go which is marked as 'ffjson: skip'. Signed-off-by: Adrian Reber <areber@redhat.com>
-rw-r--r--libpod/container.go5
-rw-r--r--libpod/container_easyjson.go2
-rw-r--r--libpod/container_internal_linux.go10
-rw-r--r--libpod/networking_linux.go22
4 files changed, 27 insertions, 12 deletions
diff --git a/libpod/container.go b/libpod/container.go
index 44992c534..d0eb6a992 100644
--- a/libpod/container.go
+++ b/libpod/container.go
@@ -128,6 +128,11 @@ type Container struct {
rootlessSlirpSyncR *os.File
rootlessSlirpSyncW *os.File
+
+ // A restored container should have the same IP address as before
+ // being checkpointed. If requestedIP is set it will be used instead
+ // of config.StaticIP.
+ requestedIP net.IP
}
// containerState contains the current state of the container
diff --git a/libpod/container_easyjson.go b/libpod/container_easyjson.go
index 50741df11..f1cb09bcc 100644
--- a/libpod/container_easyjson.go
+++ b/libpod/container_easyjson.go
@@ -1,6 +1,6 @@
// +build seccomp ostree selinux varlink exclude_graphdriver_devicemapper
-// Code generated by easyjson for marshaling/unmarshaling. DO NOT EDIT.
+// Code generated by easyjson for marshaling/unmarshaling. DO NOT EDIT
package libpod
diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index 0745b7732..1bab596fb 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -547,10 +547,8 @@ func (c *Container) restore(ctx context.Context, options ContainerCheckpointOpti
}
}
if IP != nil {
- env := fmt.Sprintf("IP=%s", IP)
// Tell CNI which IP address we want.
- os.Setenv("CNI_ARGS", env)
- logrus.Debugf("Restoring container with %s", env)
+ c.requestedIP = IP
}
}
@@ -566,12 +564,6 @@ func (c *Container) restore(ctx context.Context, options ContainerCheckpointOpti
return err
}
- // TODO: use existing way to request static IPs, once it is merged in ocicni
- // https://github.com/cri-o/ocicni/pull/23/
-
- // CNI_ARGS was used to request a certain IP address. Unconditionally remove it.
- os.Unsetenv("CNI_ARGS")
-
// Read config
jsonPath := filepath.Join(c.bundlePath(), "config.json")
logrus.Debugf("generate.NewFromFile at %v", jsonPath)
diff --git a/libpod/networking_linux.go b/libpod/networking_linux.go
index 43d0a61a4..a343bee6a 100644
--- a/libpod/networking_linux.go
+++ b/libpod/networking_linux.go
@@ -50,7 +50,16 @@ func (r *Runtime) getPodNetwork(id, name, nsPath string, networks []string, port
// Create and configure a new network namespace for a container
func (r *Runtime) configureNetNS(ctr *Container, ctrNS ns.NetNS) ([]*cnitypes.Result, error) {
- podNetwork := r.getPodNetwork(ctr.ID(), ctr.Name(), ctrNS.Path(), ctr.config.Networks, ctr.config.PortMappings, ctr.config.StaticIP)
+ var requestedIP net.IP
+ if ctr.requestedIP != nil {
+ requestedIP = ctr.requestedIP
+ // cancel request for a specific IP in case the container is reused later
+ ctr.requestedIP = nil
+ } else {
+ requestedIP = ctr.config.StaticIP
+ }
+
+ podNetwork := r.getPodNetwork(ctr.ID(), ctr.Name(), ctrNS.Path(), ctr.config.Networks, ctr.config.PortMappings, requestedIP)
results, err := r.netPlugin.SetUpPod(podNetwork)
if err != nil {
@@ -258,7 +267,16 @@ func (r *Runtime) teardownNetNS(ctr *Container) error {
logrus.Debugf("Tearing down network namespace at %s for container %s", ctr.state.NetNS.Path(), ctr.ID())
- podNetwork := r.getPodNetwork(ctr.ID(), ctr.Name(), ctr.state.NetNS.Path(), ctr.config.Networks, ctr.config.PortMappings, ctr.config.StaticIP)
+ var requestedIP net.IP
+ if ctr.requestedIP != nil {
+ requestedIP = ctr.requestedIP
+ // cancel request for a specific IP in case the container is reused later
+ ctr.requestedIP = nil
+ } else {
+ requestedIP = ctr.config.StaticIP
+ }
+
+ podNetwork := r.getPodNetwork(ctr.ID(), ctr.Name(), ctr.state.NetNS.Path(), ctr.config.Networks, ctr.config.PortMappings, requestedIP)
// The network may have already been torn down, so don't fail here, just log
if err := r.netPlugin.TearDownPod(podNetwork); err != nil {