From c83e78277a9d238afff2178ec361be7f64620b0c Mon Sep 17 00:00:00 2001 From: Daniel J Walsh Date: Sat, 23 Feb 2019 07:52:05 -0500 Subject: In shared networkNS /etc/resolv.conf&/etc/hosts should be shared We should just bind mount the original containers /etc/resolv.conf and /etchosts into the new container. Changes in the resolv.conf and hosts should be seen by all containers, This matches Docker behaviour. In order to make this work the labels on these files need to have a shared SELinux label. Signed-off-by: Daniel J Walsh --- libpod/container_internal_linux.go | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) (limited to 'libpod/container_internal_linux.go') diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go index 86f94477e..3c0c5c3cf 100644 --- a/libpod/container_internal_linux.go +++ b/libpod/container_internal_linux.go @@ -26,7 +26,6 @@ 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" @@ -677,20 +676,12 @@ func (c *Container) makeBindMounts() error { // 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 - } + c.state.BindMounts["/etc/resolv.conf"] = resolvPath + } 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 + c.state.BindMounts["/etc/hosts"] = hostsPath } } else { newResolv, err := c.generateResolvConf() @@ -705,6 +696,14 @@ func (c *Container) makeBindMounts() error { } c.state.BindMounts["/etc/hosts"] = newHosts } + + if err := label.Relabel(c.state.BindMounts["/etc/hosts"], c.config.MountLabel, true); err != nil { + return err + } + + if err := label.Relabel(c.state.BindMounts["/etc/resolv.conf"], c.config.MountLabel, true); err != nil { + return err + } } // SHM is always added when we mount the container @@ -809,7 +808,7 @@ func (c *Container) generateResolvConf() (string, error) { } // Relabel resolv.conf for the container - if err := label.Relabel(destPath, c.config.MountLabel, false); err != nil { + if err := label.Relabel(destPath, c.config.MountLabel, true); err != nil { return "", err } -- cgit v1.2.3-54-g00ecf