0b592467d9
Ensure data-race-free access to the daemon configuration without locking by mutating a deep copy of the config and atomically storing a pointer to the copy into the daemon-wide configStore value. Any operations which need to read from the daemon config must capture the configStore value only once and pass it around to guarantee a consistent view of the config. Signed-off-by: Cory Snider <csnider@mirantis.com>
105 lines
3 KiB
Go
105 lines
3 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/containerd/containerd"
|
|
"github.com/containerd/containerd/containers"
|
|
"github.com/containerd/containerd/oci"
|
|
coci "github.com/containerd/containerd/oci"
|
|
"github.com/containerd/containerd/pkg/apparmor"
|
|
"github.com/docker/docker/container"
|
|
"github.com/docker/docker/daemon/config"
|
|
"github.com/docker/docker/oci/caps"
|
|
specs "github.com/opencontainers/runtime-spec/specs-go"
|
|
)
|
|
|
|
func withResetAdditionalGIDs() oci.SpecOpts {
|
|
return func(_ context.Context, _ oci.Client, _ *containers.Container, s *oci.Spec) error {
|
|
s.Process.User.AdditionalGids = nil
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func getUserFromContainerd(ctx context.Context, containerdCli *containerd.Client, ec *container.ExecConfig) (specs.User, error) {
|
|
ctr, err := containerdCli.LoadContainer(ctx, ec.Container.ID)
|
|
if err != nil {
|
|
return specs.User{}, err
|
|
}
|
|
|
|
cinfo, err := ctr.Info(ctx)
|
|
if err != nil {
|
|
return specs.User{}, err
|
|
}
|
|
|
|
spec, err := ctr.Spec(ctx)
|
|
if err != nil {
|
|
return specs.User{}, err
|
|
}
|
|
|
|
opts := []oci.SpecOpts{
|
|
coci.WithUser(ec.User),
|
|
withResetAdditionalGIDs(),
|
|
coci.WithAdditionalGIDs(ec.User),
|
|
}
|
|
for _, opt := range opts {
|
|
if err := opt(ctx, containerdCli, &cinfo, spec); err != nil {
|
|
return specs.User{}, err
|
|
}
|
|
}
|
|
|
|
return spec.Process.User, nil
|
|
}
|
|
|
|
func (daemon *Daemon) execSetPlatformOpt(ctx context.Context, daemonCfg *config.Config, ec *container.ExecConfig, p *specs.Process) error {
|
|
if len(ec.User) > 0 {
|
|
var err error
|
|
if daemon.UsesSnapshotter() {
|
|
p.User, err = getUserFromContainerd(ctx, daemon.containerdCli, ec)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
p.User, err = getUser(ec.Container, ec.User)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
if ec.Privileged {
|
|
p.Capabilities = &specs.LinuxCapabilities{
|
|
Bounding: caps.GetAllCapabilities(),
|
|
Permitted: caps.GetAllCapabilities(),
|
|
Effective: caps.GetAllCapabilities(),
|
|
}
|
|
}
|
|
|
|
if apparmor.HostSupports() {
|
|
var appArmorProfile string
|
|
if ec.Container.AppArmorProfile != "" {
|
|
appArmorProfile = ec.Container.AppArmorProfile
|
|
} else if ec.Container.HostConfig.Privileged {
|
|
// `docker exec --privileged` does not currently disable AppArmor
|
|
// profiles. Privileged configuration of the container is inherited
|
|
appArmorProfile = unconfinedAppArmorProfile
|
|
} else {
|
|
appArmorProfile = defaultAppArmorProfile
|
|
}
|
|
|
|
if appArmorProfile == defaultAppArmorProfile {
|
|
// Unattended upgrades and other fun services can unload AppArmor
|
|
// profiles inadvertently. Since we cannot store our profile in
|
|
// /etc/apparmor.d, nor can we practically add other ways of
|
|
// telling the system to keep our profile loaded, in order to make
|
|
// sure that we keep the default profile enabled we dynamically
|
|
// reload it if necessary.
|
|
if err := ensureDefaultAppArmorProfile(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
p.ApparmorProfile = appArmorProfile
|
|
}
|
|
s := &specs.Spec{Process: p}
|
|
return withRlimits(daemon, daemonCfg, ec.Container)(ctx, nil, nil, s)
|
|
}
|