diff --git a/driver/docker-container/driver.go b/driver/docker-container/driver.go index 912a878bf6d..78538c8594f 100644 --- a/driver/docker-container/driver.go +++ b/driver/docker-container/driver.go @@ -37,6 +37,7 @@ const ( type Driver struct { driver.InitConfig factory driver.Factory + userNSRemap bool // true if dockerd is running with userns-remap mode netMode string image string cgroupParent string @@ -112,7 +113,6 @@ func (d *Driver) create(ctx context.Context, l progress.SubLogger) error { if err := l.Wrap("creating container "+d.Name, func() error { hc := &container.HostConfig{ Privileged: true, - UsernsMode: "host", Mounts: []mount.Mount{ { Type: mount.TypeVolume, @@ -121,6 +121,9 @@ func (d *Driver) create(ctx context.Context, l progress.SubLogger) error { }, }, } + if d.userNSRemap { + hc.UsernsMode = "host" + } if d.netMode != "" { hc.NetworkMode = container.NetworkMode(d.netMode) } diff --git a/driver/docker-container/factory.go b/driver/docker-container/factory.go index ae4d39b9a47..9b8212fd918 100644 --- a/driver/docker-container/factory.go +++ b/driver/docker-container/factory.go @@ -6,6 +6,7 @@ import ( "strings" "github.com/docker/buildx/driver" + dockertypes "github.com/docker/docker/api/types" dockerclient "github.com/docker/docker/client" "github.com/pkg/errors" ) @@ -40,6 +41,20 @@ func (f *factory) New(ctx context.Context, cfg driver.InitConfig) (driver.Driver return nil, errors.Errorf("%s driver requires docker API access", f.Name()) } d := &Driver{factory: f, InitConfig: cfg} + dockerInfo, err := cfg.DockerAPI.Info(ctx) + if err != nil { + return nil, err + } + secOpts, err := dockertypes.DecodeSecurityOptions(dockerInfo.SecurityOptions) + if err != nil { + return nil, err + } + for _, f := range secOpts { + if f.Name == "userns" { + d.userNSRemap = true + break + } + } for k, v := range cfg.DriverOpts { switch { case k == "network":