From 1ae410d19e0ead7db89192b3d0e290a677314d6e Mon Sep 17 00:00:00 2001 From: Matthew Heon Date: Tue, 19 Jan 2021 13:41:50 -0500 Subject: 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 --- cmd/podman/common/create_opts.go | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) (limited to 'cmd') diff --git a/cmd/podman/common/create_opts.go b/cmd/podman/common/create_opts.go index a4da8da9e..d86a6d364 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)) -- cgit v1.2.3-54-g00ecf