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This adds both a daemon-wide flag and a container creation property: - Set the `CgroupnsMode: "host|private"` HostConfig property at container creation time to control what cgroup namespace the container is created in - Set the `--default-cgroupns-mode=host|private` daemon flag to control what cgroup namespace containers are created in by default - Set the default if the daemon flag is unset to "host", for backward compatibility - Default to CgroupnsMode: "host" for client versions < 1.40 Signed-off-by: Rob Gulewich <rgulewich@netflix.com>
111 lines
4.2 KiB
Go
111 lines
4.2 KiB
Go
// +build linux freebsd
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package config // import "github.com/docker/docker/daemon/config"
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import (
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"fmt"
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containertypes "github.com/docker/docker/api/types/container"
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"github.com/docker/docker/opts"
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"github.com/docker/go-units"
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)
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const (
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// DefaultCgroupNamespaceMode is the default for a container's CgroupnsMode, if not set otherwise
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DefaultCgroupNamespaceMode = "host" // TODO: change to private
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// DefaultIpcMode is default for container's IpcMode, if not set otherwise
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DefaultIpcMode = "private"
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)
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// Config defines the configuration of a docker daemon.
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// It includes json tags to deserialize configuration from a file
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// using the same names that the flags in the command line uses.
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type Config struct {
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CommonConfig
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// These fields are common to all unix platforms.
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CommonUnixConfig
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// Fields below here are platform specific.
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CgroupParent string `json:"cgroup-parent,omitempty"`
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EnableSelinuxSupport bool `json:"selinux-enabled,omitempty"`
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RemappedRoot string `json:"userns-remap,omitempty"`
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Ulimits map[string]*units.Ulimit `json:"default-ulimits,omitempty"`
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CPURealtimePeriod int64 `json:"cpu-rt-period,omitempty"`
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CPURealtimeRuntime int64 `json:"cpu-rt-runtime,omitempty"`
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OOMScoreAdjust int `json:"oom-score-adjust,omitempty"`
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Init bool `json:"init,omitempty"`
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InitPath string `json:"init-path,omitempty"`
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SeccompProfile string `json:"seccomp-profile,omitempty"`
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ShmSize opts.MemBytes `json:"default-shm-size,omitempty"`
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NoNewPrivileges bool `json:"no-new-privileges,omitempty"`
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IpcMode string `json:"default-ipc-mode,omitempty"`
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CgroupNamespaceMode string `json:"default-cgroupns-mode,omitempty"`
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// ResolvConf is the path to the configuration of the host resolver
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ResolvConf string `json:"resolv-conf,omitempty"`
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Rootless bool `json:"rootless,omitempty"`
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}
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// BridgeConfig stores all the bridge driver specific
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// configuration.
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type BridgeConfig struct {
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commonBridgeConfig
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// These fields are common to all unix platforms.
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commonUnixBridgeConfig
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// Fields below here are platform specific.
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EnableIPv6 bool `json:"ipv6,omitempty"`
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EnableIPTables bool `json:"iptables,omitempty"`
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EnableIPForward bool `json:"ip-forward,omitempty"`
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EnableIPMasq bool `json:"ip-masq,omitempty"`
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EnableUserlandProxy bool `json:"userland-proxy,omitempty"`
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UserlandProxyPath string `json:"userland-proxy-path,omitempty"`
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FixedCIDRv6 string `json:"fixed-cidr-v6,omitempty"`
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}
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// IsSwarmCompatible defines if swarm mode can be enabled in this config
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func (conf *Config) IsSwarmCompatible() error {
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if conf.ClusterStore != "" || conf.ClusterAdvertise != "" {
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return fmt.Errorf("--cluster-store and --cluster-advertise daemon configurations are incompatible with swarm mode")
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}
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if conf.LiveRestoreEnabled {
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return fmt.Errorf("--live-restore daemon configuration is incompatible with swarm mode")
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}
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return nil
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}
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func verifyDefaultIpcMode(mode string) error {
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const hint = "Use \"shareable\" or \"private\"."
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dm := containertypes.IpcMode(mode)
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if !dm.Valid() {
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return fmt.Errorf("Default IPC mode setting (%v) is invalid. "+hint, dm)
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}
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if dm != "" && !dm.IsPrivate() && !dm.IsShareable() {
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return fmt.Errorf("IPC mode \"%v\" is not supported as default value. "+hint, dm)
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}
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return nil
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}
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func verifyDefaultCgroupNsMode(mode string) error {
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cm := containertypes.CgroupnsMode(mode)
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if !cm.Valid() {
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return fmt.Errorf("Default cgroup namespace mode (%v) is invalid. Use \"host\" or \"private\".", cm) // nolint: golint
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}
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return nil
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}
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// ValidatePlatformConfig checks if any platform-specific configuration settings are invalid.
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func (conf *Config) ValidatePlatformConfig() error {
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if err := verifyDefaultIpcMode(conf.IpcMode); err != nil {
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return err
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}
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return verifyDefaultCgroupNsMode(conf.CgroupNamespaceMode)
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}
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// IsRootless returns conf.Rootless
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func (conf *Config) IsRootless() bool {
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return conf.Rootless
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}
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