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Deduplicate between Volumes and Mounts in compat API

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Docker Compose v2.0 passes mount specifications in two different
places: Volumes (just the destination) and Mounts (full info
provided - source, destination, etc). This was causing Podman to
refuse to create containers, as the destination was used twice.
Deduplicate between Mounts and Volumes, preferring volumes, to
resolve this.

Fixes #11822

Signed-off-by: Matthew Heon <mheon@redhat.com>
This commit is contained in:
Matthew Heon
2022-03-17 10:40:55 -04:00
parent ecd2746ce3
commit 0793a58343
1 changed files with 11 additions and 2 deletions
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13
cmd/podman/common/create_opts.go
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@ -97,12 +97,21 @@ func ContainerCreateToContainerCLIOpts(cc handlers.CreateContainerConfig, rtc *c
}
// mounts type=tmpfs/bind,source=...,target=...=,opt=val
volSources := make(map[string]bool)
volDestinations := make(map[string]bool)
mounts := make([]string, 0, len(cc.HostConfig.Mounts))
var builder strings.Builder
for _, m := range cc.HostConfig.Mounts {
addField(&builder, "type", string(m.Type))
addField(&builder, "source", m.Source)
addField(&builder, "target", m.Target)
// Store source/dest so we don't add duplicates if a volume is
// also mentioned in cc.Volumes.
// Which Docker Compose v2.0 does, for unclear reasons...
volSources[m.Source] = true
volDestinations[m.Target] = true
if m.ReadOnly {
addField(&builder, "ro", "true")
}
@ -328,8 +337,6 @@ func ContainerCreateToContainerCLIOpts(cc handlers.CreateContainerConfig, rtc *c
}
// volumes
volSources := make(map[string]bool)
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
@ -348,6 +355,8 @@ func ContainerCreateToContainerCLIOpts(cc handlers.CreateContainerConfig, rtc *c
// 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.
// This also handles volumes duplicated between cc.HostConfig.Mounts and
// cc.Volumes, as seen in compose v2.0.
for vol := range cc.Volumes {
if _, ok := volDestinations[filepath.Clean(vol)]; ok {
continue