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-rw-r--r--libpod/container_internal_linux.go75
1 files changed, 58 insertions, 17 deletions
diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index 4f2955110..93d20491e 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -26,6 +26,7 @@ import (
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/secrets"
"github.com/containers/storage/pkg/idtools"
+ "github.com/mrunalp/fileutils"
"github.com/opencontainers/runc/libcontainer/user"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/runtime-tools/generate"
@@ -645,28 +646,68 @@ func (c *Container) makeBindMounts() error {
}
if !netDisabled {
- // Make /etc/resolv.conf
- if _, ok := c.state.BindMounts["/etc/resolv.conf"]; ok {
- // If it already exists, delete so we can recreate
+ // If /etc/resolv.conf and /etc/hosts exist, delete them so we
+ // will recreate
+ if path, ok := c.state.BindMounts["/etc/resolv.conf"]; ok {
+ if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+ return errors.Wrapf(err, "error removing container %s resolv.conf", c.ID())
+ }
delete(c.state.BindMounts, "/etc/resolv.conf")
}
- newResolv, err := c.generateResolvConf()
- if err != nil {
- return errors.Wrapf(err, "error creating resolv.conf for container %s", c.ID())
- }
- c.state.BindMounts["/etc/resolv.conf"] = newResolv
-
- // Make /etc/hosts
- if _, ok := c.state.BindMounts["/etc/hosts"]; ok {
- // If it already exists, delete so we can recreate
+ if path, ok := c.state.BindMounts["/etc/hosts"]; ok {
+ if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+ return errors.Wrapf(err, "error removing container %s hosts", c.ID())
+ }
delete(c.state.BindMounts, "/etc/hosts")
}
- newHosts, err := c.generateHosts()
- if err != nil {
- return errors.Wrapf(err, "error creating hosts file for container %s", c.ID())
- }
- c.state.BindMounts["/etc/hosts"] = newHosts
+ if c.config.NetNsCtr != "" {
+ // We share a net namespace
+ // We want /etc/resolv.conf and /etc/hosts from the
+ // other container
+ depCtr, err := c.runtime.state.Container(c.config.NetNsCtr)
+ if err != nil {
+ return errors.Wrapf(err, "error fetching dependency %s of container %s", c.config.NetNsCtr, c.ID())
+ }
+
+ // We need that container's bind mounts
+ bindMounts, err := depCtr.BindMounts()
+ if err != nil {
+ return errors.Wrapf(err, "error fetching bind mounts from dependency %s of container %s", depCtr.ID(), c.ID())
+ }
+
+ // The other container may not have a resolv.conf or /etc/hosts
+ // If it doesn't, don't copy them
+ resolvPath, exists := bindMounts["/etc/resolv.conf"]
+ if exists {
+ resolvDest := filepath.Join(c.state.RunDir, "resolv.conf")
+ if err := fileutils.CopyFile(resolvPath, resolvDest); err != nil {
+ return errors.Wrapf(err, "error copying resolv.conf from dependency container %s of container %s", depCtr.ID(), c.ID())
+ }
+ c.state.BindMounts["/etc/resolv.conf"] = resolvDest
+ }
+
+ hostsPath, exists := bindMounts["/etc/hosts"]
+ if exists {
+ hostsDest := filepath.Join(c.state.RunDir, "hosts")
+ if err := fileutils.CopyFile(hostsPath, hostsDest); err != nil {
+ return errors.Wrapf(err, "error copying hosts file from dependency container %s of container %s", depCtr.ID(), c.ID())
+ }
+ c.state.BindMounts["/etc/hosts"] = hostsDest
+ }
+ } else {
+ newResolv, err := c.generateResolvConf()
+ if err != nil {
+ return errors.Wrapf(err, "error creating resolv.conf for container %s", c.ID())
+ }
+ c.state.BindMounts["/etc/resolv.conf"] = newResolv
+
+ newHosts, err := c.generateHosts()
+ if err != nil {
+ return errors.Wrapf(err, "error creating hosts file for container %s", c.ID())
+ }
+ c.state.BindMounts["/etc/hosts"] = newHosts
+ }
}
// SHM is always added when we mount the container