Ensure the Volumes field in Compat Create is honored

Docker has, for unclear reasons, three separate fields in their
Create Container struct in which volumes can be placed. Right now
we support two of those - Binds and Mounts, which (roughly)
correspond to `-v` and `--mount` respectively. Unfortunately, we
did not support the third, `Volumes`, which is used for anonymous
named volumes created by `-v` (e.g. `-v /test`). It seems that
volumes listed here are *not* included in the remaining two from
my investigation, so it should be safe to just append them into
our handling of the `Binds` (`-v`) field.

Fixes #8649

Signed-off-by: Matthew Heon <mheon@redhat.com>

1 files changed, 24 insertions, 2 deletions

diff --git a/cmd/podman/common/create_opts.go b/cmd/podman/common/create_opts.go
index f252618ce..f3918d233 100644
--- a/cmd/podman/common/create_opts.go
+++ b/cmd/podman/common/create_opts.go
@@ -3,6 +3,7 @@ package common
 import (
 	"fmt"
 	"net"
+	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -383,8 +384,29 @@ func ContainerCreateToContainerCLIOpts(cc handlers.CreateContainerConfig, cgroup
 	}
 
 	// volumes
-	if volumes := cc.HostConfig.Binds; len(volumes) > 0 {
-		cliOpts.Volume = volumes
+	volDestinations := make(map[string]bool)
+	for _, vol := range cc.HostConfig.Binds {
+		cliOpts.Volume = append(cliOpts.Volume, vol)
+		// Extract the destination so we don't add duplicate mounts in
+		// the volumes phase.
+		splitVol := strings.SplitN(vol, ":", 3)
+		switch len(splitVol) {
+		case 1:
+			volDestinations[vol] = true
+		default:
+			volDestinations[splitVol[1]] = true
+		}
+	}
+	// Anonymous volumes are added differently from other volumes, in their
+	// own special field, for reasons known only to Docker. Still use the
+	// format of `-v` so we can just append them in there.
+	// Unfortunately, these may be duplicates of existing mounts in Binds.
+	// So... We need to catch that.
+	for vol := range cc.Volumes {
+		if _, ok := volDestinations[filepath.Clean(vol)]; ok {
+			continue
+		}
+		cliOpts.Volume = append(cliOpts.Volume, vol)
 	}
 	if len(cc.HostConfig.BlkioWeightDevice) > 0 {
 		devices := make([]string, 0, len(cc.HostConfig.BlkioWeightDevice))