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package container // import "github.com/docker/docker/api/types/container"
import (
"strings"
"github.com/docker/docker/api/types/blkiodev"
"github.com/docker/docker/api/types/mount"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/go-connections/nat"
"github.com/docker/go-units"
)
// CgroupnsMode represents the cgroup namespace mode of the container
type CgroupnsMode string
// IsPrivate indicates whether the container uses its own private cgroup namespace
func (c CgroupnsMode) IsPrivate() bool {
return c == "private"
}
// IsHost indicates whether the container shares the host's cgroup namespace
func (c CgroupnsMode) IsHost() bool {
return c == "host"
}
// IsEmpty indicates whether the container cgroup namespace mode is unset
func (c CgroupnsMode) IsEmpty() bool {
return c == ""
}
// Valid indicates whether the cgroup namespace mode is valid
func (c CgroupnsMode) Valid() bool {
return c.IsEmpty() || c.IsPrivate() || c.IsHost()
}
// Isolation represents the isolation technology of a container. The supported
// values are platform specific
type Isolation string
// IsDefault indicates the default isolation technology of a container. On Linux this
// is the native driver. On Windows, this is a Windows Server Container.
func (i Isolation) IsDefault() bool {
return strings.ToLower(string(i)) == "default" || string(i) == ""
}
// IsHyperV indicates the use of a Hyper-V partition for isolation
func (i Isolation) IsHyperV() bool {
return strings.ToLower(string(i)) == "hyperv"
}
// IsProcess indicates the use of process isolation
func (i Isolation) IsProcess() bool {
return strings.ToLower(string(i)) == "process"
}
const (
// IsolationEmpty is unspecified (same behavior as default)
IsolationEmpty = Isolation("")
// IsolationDefault is the default isolation mode on current daemon
IsolationDefault = Isolation("default")
// IsolationProcess is process isolation mode
IsolationProcess = Isolation("process")
// IsolationHyperV is HyperV isolation mode
IsolationHyperV = Isolation("hyperv")
)
// IpcMode represents the container ipc stack.
type IpcMode string
// IsPrivate indicates whether the container uses its own private ipc namespace which can not be shared.
func (n IpcMode) IsPrivate() bool {
return n == "private"
}
// IsHost indicates whether the container shares the host's ipc namespace.
func (n IpcMode) IsHost() bool {
return n == "host"
}
// IsShareable indicates whether the container's ipc namespace can be shared with another container.
func (n IpcMode) IsShareable() bool {
return n == "shareable"
}
// IsContainer indicates whether the container uses another container's ipc namespace.
func (n IpcMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// IsNone indicates whether container IpcMode is set to "none".
func (n IpcMode) IsNone() bool {
return n == "none"
}
// IsEmpty indicates whether container IpcMode is empty
func (n IpcMode) IsEmpty() bool {
return n == ""
}
// Valid indicates whether the ipc mode is valid.
func (n IpcMode) Valid() bool {
return n.IsEmpty() || n.IsNone() || n.IsPrivate() || n.IsHost() || n.IsShareable() || n.IsContainer()
}
// Container returns the name of the container ipc stack is going to be used.
func (n IpcMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 && parts[0] == "container" {
return parts[1]
}
return ""
}
// NetworkMode represents the container network stack.
type NetworkMode string
// IsNone indicates whether container isn't using a network stack.
func (n NetworkMode) IsNone() bool {
return n == "none"
}
// IsDefault indicates whether container uses the default network stack.
func (n NetworkMode) IsDefault() bool {
return n == "default"
}
// IsPrivate indicates whether container uses its private network stack.
func (n NetworkMode) IsPrivate() bool {
return !(n.IsHost() || n.IsContainer())
}
// IsContainer indicates whether container uses a container network stack.
func (n NetworkMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// ConnectedContainer is the id of the container which network this container is connected to.
func (n NetworkMode) ConnectedContainer() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
//UserDefined indicates user-created network
func (n NetworkMode) UserDefined() string {
if n.IsUserDefined() {
return string(n)
}
return ""
}
// UsernsMode represents userns mode in the container.
type UsernsMode string
// IsHost indicates whether the container uses the host's userns.
func (n UsernsMode) IsHost() bool {
return n == "host"
}
// IsPrivate indicates whether the container uses the a private userns.
func (n UsernsMode) IsPrivate() bool {
return !(n.IsHost())
}
// Valid indicates whether the userns is valid.
func (n UsernsMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
default:
return false
}
return true
}
// CgroupSpec represents the cgroup to use for the container.
type CgroupSpec string
// IsContainer indicates whether the container is using another container cgroup
func (c CgroupSpec) IsContainer() bool {
parts := strings.SplitN(string(c), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Valid indicates whether the cgroup spec is valid.
func (c CgroupSpec) Valid() bool {
return c.IsContainer() || c == ""
}
// Container returns the name of the container whose cgroup will be used.
func (c CgroupSpec) Container() string {
parts := strings.SplitN(string(c), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// UTSMode represents the UTS namespace of the container.
type UTSMode string
// IsPrivate indicates whether the container uses its private UTS namespace.
func (n UTSMode) IsPrivate() bool {
return !(n.IsHost())
}
// IsHost indicates whether the container uses the host's UTS namespace.
func (n UTSMode) IsHost() bool {
return n == "host"
}
// Valid indicates whether the UTS namespace is valid.
func (n UTSMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
default:
return false
}
return true
}
// PidMode represents the pid namespace of the container.
type PidMode string
// IsPrivate indicates whether the container uses its own new pid namespace.
func (n PidMode) IsPrivate() bool {
return !(n.IsHost() || n.IsContainer())
}
// IsHost indicates whether the container uses the host's pid namespace.
func (n PidMode) IsHost() bool {
return n == "host"
}
// IsContainer indicates whether the container uses a container's pid namespace.
func (n PidMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Valid indicates whether the pid namespace is valid.
func (n PidMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
case "container":
if len(parts) != 2 || parts[1] == "" {
return false
}
default:
return false
}
return true
}
// Container returns the name of the container whose pid namespace is going to be used.
func (n PidMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// DeviceRequest represents a request for devices from a device driver.
// Used by GPU device drivers.
type DeviceRequest struct {
Driver string // Name of device driver
Count int // Number of devices to request (-1 = All)
DeviceIDs []string // List of device IDs as recognizable by the device driver
Capabilities [][]string // An OR list of AND lists of device capabilities (e.g. "gpu")
Options map[string]string // Options to pass onto the device driver
}
// DeviceMapping represents the device mapping between the host and the container.
type DeviceMapping struct {
PathOnHost string
PathInContainer string
CgroupPermissions string
}
// RestartPolicy represents the restart policies of the container.
type RestartPolicy struct {
Name string
MaximumRetryCount int
}
// IsNone indicates whether the container has the "no" restart policy.
// This means the container will not automatically restart when exiting.
func (rp *RestartPolicy) IsNone() bool {
return rp.Name == "no" || rp.Name == ""
}
// IsAlways indicates whether the container has the "always" restart policy.
// This means the container will automatically restart regardless of the exit status.
func (rp *RestartPolicy) IsAlways() bool {
return rp.Name == "always"
}
// IsOnFailure indicates whether the container has the "on-failure" restart policy.
// This means the container will automatically restart of exiting with a non-zero exit status.
func (rp *RestartPolicy) IsOnFailure() bool {
return rp.Name == "on-failure"
}
// IsUnlessStopped indicates whether the container has the
// "unless-stopped" restart policy. This means the container will
// automatically restart unless user has put it to stopped state.
func (rp *RestartPolicy) IsUnlessStopped() bool {
return rp.Name == "unless-stopped"
}
// IsSame compares two RestartPolicy to see if they are the same
func (rp *RestartPolicy) IsSame(tp *RestartPolicy) bool {
return rp.Name == tp.Name && rp.MaximumRetryCount == tp.MaximumRetryCount
}
// LogMode is a type to define the available modes for logging
// These modes affect how logs are handled when log messages start piling up.
type LogMode string
// Available logging modes
const (
LogModeUnset = ""
LogModeBlocking LogMode = "blocking"
LogModeNonBlock LogMode = "non-blocking"
)
// LogConfig represents the logging configuration of the container.
type LogConfig struct {
Type string
Config map[string]string
}
// Resources contains container's resources (cgroups config, ulimits...)
type Resources struct {
// Applicable to all platforms
CPUShares int64 `json:"CpuShares"` // CPU shares (relative weight vs. other containers)
Memory int64 // Memory limit (in bytes)
NanoCPUs int64 `json:"NanoCpus"` // CPU quota in units of 10<sup>-9</sup> CPUs.
// Applicable to UNIX platforms
CgroupParent string // Parent cgroup.
BlkioWeight uint16 // Block IO weight (relative weight vs. other containers)
BlkioWeightDevice []*blkiodev.WeightDevice
BlkioDeviceReadBps []*blkiodev.ThrottleDevice
BlkioDeviceWriteBps []*blkiodev.ThrottleDevice
BlkioDeviceReadIOps []*blkiodev.ThrottleDevice
BlkioDeviceWriteIOps []*blkiodev.ThrottleDevice
CPUPeriod int64 `json:"CpuPeriod"` // CPU CFS (Completely Fair Scheduler) period
CPUQuota int64 `json:"CpuQuota"` // CPU CFS (Completely Fair Scheduler) quota
CPURealtimePeriod int64 `json:"CpuRealtimePeriod"` // CPU real-time period
CPURealtimeRuntime int64 `json:"CpuRealtimeRuntime"` // CPU real-time runtime
CpusetCpus string // CpusetCpus 0-2, 0,1
CpusetMems string // CpusetMems 0-2, 0,1
Devices []DeviceMapping // List of devices to map inside the container
DeviceCgroupRules []string // List of rule to be added to the device cgroup
DeviceRequests []DeviceRequest // List of device requests for device drivers
KernelMemory int64 // Kernel memory limit (in bytes)
KernelMemoryTCP int64 // Hard limit for kernel TCP buffer memory (in bytes)
MemoryReservation int64 // Memory soft limit (in bytes)
MemorySwap int64 // Total memory usage (memory + swap); set `-1` to enable unlimited swap
MemorySwappiness *int64 // Tuning container memory swappiness behaviour
OomKillDisable *bool // Whether to disable OOM Killer or not
PidsLimit *int64 // Setting PIDs limit for a container; Set `0` or `-1` for unlimited, or `null` to not change.
Ulimits []*units.Ulimit // List of ulimits to be set in the container
// Applicable to Windows
CPUCount int64 `json:"CpuCount"` // CPU count
CPUPercent int64 `json:"CpuPercent"` // CPU percent
IOMaximumIOps uint64 // Maximum IOps for the container system drive
IOMaximumBandwidth uint64 // Maximum IO in bytes per second for the container system drive
}
// UpdateConfig holds the mutable attributes of a Container.
// Those attributes can be updated at runtime.
type UpdateConfig struct {
// Contains container's resources (cgroups, ulimits)
Resources
RestartPolicy RestartPolicy
}
// HostConfig the non-portable Config structure of a container.
// Here, "non-portable" means "dependent of the host we are running on".
// Portable information *should* appear in Config.
type HostConfig struct {
// Applicable to all platforms
Binds []string // List of volume bindings for this container
ContainerIDFile string // File (path) where the containerId is written
LogConfig LogConfig // Configuration of the logs for this container
NetworkMode NetworkMode // Network mode to use for the container
PortBindings nat.PortMap // Port mapping between the exposed port (container) and the host
RestartPolicy RestartPolicy // Restart policy to be used for the container
AutoRemove bool // Automatically remove container when it exits
VolumeDriver string // Name of the volume driver used to mount volumes
VolumesFrom []string // List of volumes to take from other container
// Applicable to UNIX platforms
CapAdd strslice.StrSlice // List of kernel capabilities to add to the container
CapDrop strslice.StrSlice // List of kernel capabilities to remove from the container
Capabilities []string `json:"Capabilities"` // List of kernel capabilities to be available for container (this overrides the default set)
CgroupnsMode CgroupnsMode // Cgroup namespace mode to use for the container
DNS []string `json:"Dns"` // List of DNS server to lookup
DNSOptions []string `json:"DnsOptions"` // List of DNSOption to look for
DNSSearch []string `json:"DnsSearch"` // List of DNSSearch to look for
ExtraHosts []string // List of extra hosts
GroupAdd []string // List of additional groups that the container process will run as
IpcMode IpcMode // IPC namespace to use for the container
Cgroup CgroupSpec // Cgroup to use for the container
Links []string // List of links (in the name:alias form)
OomScoreAdj int // Container preference for OOM-killing
PidMode PidMode // PID namespace to use for the container
Privileged bool // Is the container in privileged mode
PublishAllPorts bool // Should docker publish all exposed port for the container
ReadonlyRootfs bool // Is the container root filesystem in read-only
SecurityOpt []string // List of string values to customize labels for MLS systems, such as SELinux.
StorageOpt map[string]string `json:",omitempty"` // Storage driver options per container.
Tmpfs map[string]string `json:",omitempty"` // List of tmpfs (mounts) used for the container
UTSMode UTSMode // UTS namespace to use for the container
UsernsMode UsernsMode // The user namespace to use for the container
ShmSize int64 // Total shm memory usage
Sysctls map[string]string `json:",omitempty"` // List of Namespaced sysctls used for the container
Runtime string `json:",omitempty"` // Runtime to use with this container
// Applicable to Windows
ConsoleSize [2]uint // Initial console size (height,width)
Isolation Isolation // Isolation technology of the container (e.g. default, hyperv)
// Contains container's resources (cgroups, ulimits)
Resources
// Mounts specs used by the container
Mounts []mount.Mount `json:",omitempty"`
// MaskedPaths is the list of paths to be masked inside the container (this overrides the default set of paths)
MaskedPaths []string
// ReadonlyPaths is the list of paths to be set as read-only inside the container (this overrides the default set of paths)
ReadonlyPaths []string
// Run a custom init inside the container, if null, use the daemon's configured settings
Init *bool `json:",omitempty"`
}
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