diff options
Diffstat (limited to 'libpod/container_internal_linux.go')
| -rw-r--r-- | libpod/container_internal_linux.go | 75 |
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 |