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