mirror of https://github.com/docker/cli.git
cli/command/container: parseSecurityOpts: fix --security-opt seccomp=builtin
Docker v23.0 and up allow the daemon to be configured to have seccomp disabled
by default (using the "unconfined" profile as default), and introduced a new
"builtin" profile-name for the default (see [moby@f8795ed364586acd][1] and
[mnoby@ac449d6b5ad29a50][2]).
However, the CLI had no special handling for the "builtin" profile, which
resulted in it trying to load it as a file, which would fail;
docker run -it --rm --security-opt seccomp=builtin busybox
docker: opening seccomp profile (builtin) failed: open builtin: no such file or directory.
See 'docker run --help'.
This patch adds a special case for the "builtin" profile, to allow using the
default profile on daemons with seccomp disabled (unconfined) by default.
[1]: f8795ed364
[2]: ac449d6b5a
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
parent
8812e0ad3a
commit
6d0aa0a52d
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@ -28,6 +28,20 @@ import (
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cdi "tags.cncf.io/container-device-interface/pkg/parser"
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)
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const (
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// TODO(thaJeztah): define these in the API-types, or query available defaults
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// from the daemon, or require "local" profiles to be an absolute path or
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// relative paths starting with "./". The daemon-config has consts for this
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// but we don't want to import that package:
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// https://github.com/moby/moby/blob/v23.0.0/daemon/config/config.go#L63-L67
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// seccompProfileDefault is the built-in default seccomp profile.
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seccompProfileDefault = "builtin"
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// seccompProfileUnconfined is a special profile name for seccomp to use an
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// "unconfined" seccomp profile.
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seccompProfileUnconfined = "unconfined"
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)
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var deviceCgroupRuleRegexp = regexp.MustCompile(`^[acb] ([0-9]+|\*):([0-9]+|\*) [rwm]{1,3}$`)
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// containerOptions is a data object with all the options for creating a container
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@ -914,16 +928,23 @@ func parseSecurityOpts(securityOpts []string) ([]string, error) {
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// "no-new-privileges" is the only option that does not require a value.
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return securityOpts, errors.Errorf("Invalid --security-opt: %q", opt)
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}
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if k == "seccomp" && v != "unconfined" {
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f, err := os.ReadFile(v)
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if err != nil {
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return securityOpts, errors.Errorf("opening seccomp profile (%s) failed: %v", v, err)
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if k == "seccomp" {
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switch v {
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case seccompProfileDefault, seccompProfileUnconfined:
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// known special names for built-in profiles, nothing to do.
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default:
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// value may be a filename, in which case we send the profile's
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// content if it's valid JSON.
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f, err := os.ReadFile(v)
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if err != nil {
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return securityOpts, errors.Errorf("opening seccomp profile (%s) failed: %v", v, err)
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}
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b := bytes.NewBuffer(nil)
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if err := json.Compact(b, f); err != nil {
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return securityOpts, errors.Errorf("compacting json for seccomp profile (%s) failed: %v", v, err)
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}
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securityOpts[key] = fmt.Sprintf("seccomp=%s", b.Bytes())
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}
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b := bytes.NewBuffer(nil)
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if err := json.Compact(b, f); err != nil {
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return securityOpts, errors.Errorf("compacting json for seccomp profile (%s) failed: %v", v, err)
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}
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securityOpts[key] = fmt.Sprintf("seccomp=%s", b.Bytes())
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}
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}
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@ -1274,17 +1274,18 @@ in the image, or `SIGTERM` if the image has no `STOPSIGNAL` defined.
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### <a name="security-opt"></a> Optional security options (--security-opt)
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| Option | Description |
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|:------------------------------------------|:--------------------------------------------------------------------------|
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| `--security-opt="label=user:USER"` | Set the label user for the container |
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| `--security-opt="label=role:ROLE"` | Set the label role for the container |
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| `--security-opt="label=type:TYPE"` | Set the label type for the container |
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| `--security-opt="label=level:LEVEL"` | Set the label level for the container |
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| `--security-opt="label=disable"` | Turn off label confinement for the container |
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| `--security-opt="apparmor=PROFILE"` | Set the apparmor profile to be applied to the container |
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| `--security-opt="no-new-privileges=true"` | Disable container processes from gaining new privileges |
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| `--security-opt="seccomp=unconfined"` | Turn off seccomp confinement for the container |
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| `--security-opt="seccomp=profile.json"` | White-listed syscalls seccomp Json file to be used as a seccomp filter |
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| Option | Description |
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|:------------------------------------------|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| `--security-opt="label=user:USER"` | Set the label user for the container |
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| `--security-opt="label=role:ROLE"` | Set the label role for the container |
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| `--security-opt="label=type:TYPE"` | Set the label type for the container |
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| `--security-opt="label=level:LEVEL"` | Set the label level for the container |
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| `--security-opt="label=disable"` | Turn off label confinement for the container |
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| `--security-opt="apparmor=PROFILE"` | Set the apparmor profile to be applied to the container |
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| `--security-opt="no-new-privileges=true"` | Disable container processes from gaining new privileges |
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| `--security-opt="seccomp=unconfined"` | Turn off seccomp confinement for the container |
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| `--security-opt="seccomp=builtin"` | Use the default (built-in) seccomp profile for the container. This can be used to enable seccomp for a container running on a daemon with a custom default profile set, or with seccomp disabled ("unconfined"). |
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| `--security-opt="seccomp=profile.json"` | White-listed syscalls seccomp Json file to be used as a seccomp filter |
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The `--security-opt` flag lets you override the default labeling scheme for a
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container. Specifying the level in the following command allows you to share
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