472 lines
19 KiB
Go
472 lines
19 KiB
Go
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package specs
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import "os"
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// Spec is the base configuration for the container.
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type Spec struct {
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// Version is the version of the specification that is supported.
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Version string `json:"ociVersion"`
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// Platform is the host information for OS and Arch.
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Platform Platform `json:"platform"`
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// Process is the container's main process.
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Process Process `json:"process"`
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// Root is the root information for the container's filesystem.
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Root Root `json:"root"`
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// Hostname is the container's host name.
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Hostname string `json:"hostname,omitempty"`
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// Mounts profile configuration for adding mounts to the container's filesystem.
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Mounts []Mount `json:"mounts,omitempty"`
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// Hooks are the commands run at various lifecycle events of the container.
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Hooks Hooks `json:"hooks"`
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// Annotations is an unstructured key value map that may be set by external tools to store and retrieve arbitrary metadata.
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Annotations map[string]string `json:"annotations,omitempty"`
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// Linux is platform specific configuration for Linux based containers.
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Linux *Linux `json:"linux,omitempty" platform:"linux"`
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// Solaris is platform specific configuration for Solaris containers.
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Solaris *Solaris `json:"solaris,omitempty" platform:"solaris"`
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}
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// Process contains information to start a specific application inside the container.
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type Process struct {
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// Terminal creates an interactive terminal for the container.
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Terminal bool `json:"terminal,omitempty"`
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// User specifies user information for the process.
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User User `json:"user"`
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// Args specifies the binary and arguments for the application to execute.
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Args []string `json:"args"`
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// Env populates the process environment for the process.
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Env []string `json:"env,omitempty"`
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// Cwd is the current working directory for the process and must be
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// relative to the container's root.
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Cwd string `json:"cwd"`
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// Capabilities are Linux capabilities that are kept for the container.
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Capabilities []string `json:"capabilities,omitempty" platform:"linux"`
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// Rlimits specifies rlimit options to apply to the process.
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Rlimits []Rlimit `json:"rlimits,omitempty"`
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// NoNewPrivileges controls whether additional privileges could be gained by processes in the container.
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NoNewPrivileges bool `json:"noNewPrivileges,omitempty"`
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// ApparmorProfile specifies the apparmor profile for the container. (this field is platform dependent)
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ApparmorProfile string `json:"apparmorProfile,omitempty" platform:"linux"`
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// SelinuxLabel specifies the selinux context that the container process is run as. (this field is platform dependent)
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SelinuxLabel string `json:"selinuxLabel,omitempty" platform:"linux"`
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}
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// User specifies Linux/Solaris specific user and group information for the container's
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// main process.
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type User struct {
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// UID is the user id. (this field is platform dependent)
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UID uint32 `json:"uid" platform:"linux,solaris"`
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// GID is the group id. (this field is platform dependent)
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GID uint32 `json:"gid" platform:"linux,solaris"`
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// AdditionalGids are additional group ids set for the container's process. (this field is platform dependent)
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AdditionalGids []uint32 `json:"additionalGids,omitempty" platform:"linux,solaris"`
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}
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// Root contains information about the container's root filesystem on the host.
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type Root struct {
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// Path is the absolute path to the container's root filesystem.
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Path string `json:"path"`
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// Readonly makes the root filesystem for the container readonly before the process is executed.
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Readonly bool `json:"readonly,omitempty"`
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}
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// Platform specifies OS and arch information for the host system that the container
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// is created for.
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type Platform struct {
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// OS is the operating system.
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OS string `json:"os"`
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// Arch is the architecture
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Arch string `json:"arch"`
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}
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// Mount specifies a mount for a container.
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type Mount struct {
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// Destination is the path where the mount will be placed relative to the container's root. The path and child directories MUST exist, a runtime MUST NOT create directories automatically to a mount point.
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Destination string `json:"destination"`
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// Type specifies the mount kind.
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Type string `json:"type"`
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// Source specifies the source path of the mount. In the case of bind mounts on
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// Linux based systems this would be the file on the host.
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Source string `json:"source"`
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// Options are fstab style mount options.
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Options []string `json:"options,omitempty"`
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}
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// Hook specifies a command that is run at a particular event in the lifecycle of a container
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type Hook struct {
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Path string `json:"path"`
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Args []string `json:"args,omitempty"`
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Env []string `json:"env,omitempty"`
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Timeout *int `json:"timeout,omitempty"`
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}
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// Hooks for container setup and teardown
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type Hooks struct {
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// Prestart is a list of hooks to be run before the container process is executed.
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// On Linux, they are run after the container namespaces are created.
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Prestart []Hook `json:"prestart,omitempty"`
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// Poststart is a list of hooks to be run after the container process is started.
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Poststart []Hook `json:"poststart,omitempty"`
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// Poststop is a list of hooks to be run after the container process exits.
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Poststop []Hook `json:"poststop,omitempty"`
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}
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// Linux contains platform specific configuration for Linux based containers.
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type Linux struct {
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// UIDMapping specifies user mappings for supporting user namespaces on Linux.
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UIDMappings []IDMapping `json:"uidMappings,omitempty"`
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// GIDMapping specifies group mappings for supporting user namespaces on Linux.
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GIDMappings []IDMapping `json:"gidMappings,omitempty"`
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// Sysctl are a set of key value pairs that are set for the container on start
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Sysctl map[string]string `json:"sysctl,omitempty"`
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// Resources contain cgroup information for handling resource constraints
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// for the container
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Resources *Resources `json:"resources,omitempty"`
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// CgroupsPath specifies the path to cgroups that are created and/or joined by the container.
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// The path is expected to be relative to the cgroups mountpoint.
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// If resources are specified, the cgroups at CgroupsPath will be updated based on resources.
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CgroupsPath *string `json:"cgroupsPath,omitempty"`
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// Namespaces contains the namespaces that are created and/or joined by the container
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Namespaces []Namespace `json:"namespaces,omitempty"`
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// Devices are a list of device nodes that are created for the container
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Devices []Device `json:"devices,omitempty"`
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// Seccomp specifies the seccomp security settings for the container.
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Seccomp *Seccomp `json:"seccomp,omitempty"`
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// RootfsPropagation is the rootfs mount propagation mode for the container.
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RootfsPropagation string `json:"rootfsPropagation,omitempty"`
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// MaskedPaths masks over the provided paths inside the container.
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MaskedPaths []string `json:"maskedPaths,omitempty"`
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// ReadonlyPaths sets the provided paths as RO inside the container.
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ReadonlyPaths []string `json:"readonlyPaths,omitempty"`
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// MountLabel specifies the selinux context for the mounts in the container.
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MountLabel string `json:"mountLabel,omitempty"`
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}
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// Namespace is the configuration for a Linux namespace
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type Namespace struct {
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// Type is the type of Linux namespace
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Type NamespaceType `json:"type"`
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// Path is a path to an existing namespace persisted on disk that can be joined
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// and is of the same type
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Path string `json:"path,omitempty"`
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}
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// NamespaceType is one of the Linux namespaces
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type NamespaceType string
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const (
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// PIDNamespace for isolating process IDs
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PIDNamespace NamespaceType = "pid"
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// NetworkNamespace for isolating network devices, stacks, ports, etc
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NetworkNamespace = "network"
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// MountNamespace for isolating mount points
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MountNamespace = "mount"
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// IPCNamespace for isolating System V IPC, POSIX message queues
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IPCNamespace = "ipc"
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// UTSNamespace for isolating hostname and NIS domain name
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UTSNamespace = "uts"
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// UserNamespace for isolating user and group IDs
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UserNamespace = "user"
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// CgroupNamespace for isolating cgroup hierarchies
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CgroupNamespace = "cgroup"
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)
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// IDMapping specifies UID/GID mappings
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type IDMapping struct {
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// HostID is the UID/GID of the host user or group
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HostID uint32 `json:"hostID"`
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// ContainerID is the UID/GID of the container's user or group
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ContainerID uint32 `json:"containerID"`
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// Size is the length of the range of IDs mapped between the two namespaces
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Size uint32 `json:"size"`
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}
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// Rlimit type and restrictions
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type Rlimit struct {
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// Type of the rlimit to set
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Type string `json:"type"`
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// Hard is the hard limit for the specified type
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Hard uint64 `json:"hard"`
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// Soft is the soft limit for the specified type
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Soft uint64 `json:"soft"`
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}
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// HugepageLimit structure corresponds to limiting kernel hugepages
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type HugepageLimit struct {
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// Pagesize is the hugepage size
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Pagesize *string `json:"pageSize,omitempty"`
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// Limit is the limit of "hugepagesize" hugetlb usage
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Limit *uint64 `json:"limit,omitempty"`
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}
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// InterfacePriority for network interfaces
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type InterfacePriority struct {
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// Name is the name of the network interface
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Name string `json:"name"`
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// Priority for the interface
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Priority uint32 `json:"priority"`
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}
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// blockIODevice holds major:minor format supported in blkio cgroup
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type blockIODevice struct {
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// Major is the device's major number.
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Major int64 `json:"major"`
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// Minor is the device's minor number.
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Minor int64 `json:"minor"`
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}
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// WeightDevice struct holds a `major:minor weight` pair for blkioWeightDevice
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type WeightDevice struct {
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blockIODevice
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// Weight is the bandwidth rate for the device, range is from 10 to 1000
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Weight *uint16 `json:"weight,omitempty"`
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// LeafWeight is the bandwidth rate for the device while competing with the cgroup's child cgroups, range is from 10 to 1000, CFQ scheduler only
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LeafWeight *uint16 `json:"leafWeight,omitempty"`
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}
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// ThrottleDevice struct holds a `major:minor rate_per_second` pair
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type ThrottleDevice struct {
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blockIODevice
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// Rate is the IO rate limit per cgroup per device
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Rate *uint64 `json:"rate,omitempty"`
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}
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// BlockIO for Linux cgroup 'blkio' resource management
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type BlockIO struct {
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// Specifies per cgroup weight, range is from 10 to 1000
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Weight *uint16 `json:"blkioWeight,omitempty"`
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// Specifies tasks' weight in the given cgroup while competing with the cgroup's child cgroups, range is from 10 to 1000, CFQ scheduler only
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LeafWeight *uint16 `json:"blkioLeafWeight,omitempty"`
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// Weight per cgroup per device, can override BlkioWeight
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WeightDevice []WeightDevice `json:"blkioWeightDevice,omitempty"`
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// IO read rate limit per cgroup per device, bytes per second
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ThrottleReadBpsDevice []ThrottleDevice `json:"blkioThrottleReadBpsDevice,omitempty"`
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// IO write rate limit per cgroup per device, bytes per second
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ThrottleWriteBpsDevice []ThrottleDevice `json:"blkioThrottleWriteBpsDevice,omitempty"`
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// IO read rate limit per cgroup per device, IO per second
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ThrottleReadIOPSDevice []ThrottleDevice `json:"blkioThrottleReadIOPSDevice,omitempty"`
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// IO write rate limit per cgroup per device, IO per second
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ThrottleWriteIOPSDevice []ThrottleDevice `json:"blkioThrottleWriteIOPSDevice,omitempty"`
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}
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// Memory for Linux cgroup 'memory' resource management
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type Memory struct {
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// Memory limit (in bytes).
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Limit *uint64 `json:"limit,omitempty"`
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// Memory reservation or soft_limit (in bytes).
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Reservation *uint64 `json:"reservation,omitempty"`
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// Total memory limit (memory + swap).
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Swap *uint64 `json:"swap,omitempty"`
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// Kernel memory limit (in bytes).
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Kernel *uint64 `json:"kernel,omitempty"`
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// Kernel memory limit for tcp (in bytes)
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KernelTCP *uint64 `json:"kernelTCP"`
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// How aggressive the kernel will swap memory pages. Range from 0 to 100.
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Swappiness *uint64 `json:"swappiness,omitempty"`
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}
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// CPU for Linux cgroup 'cpu' resource management
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type CPU struct {
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// CPU shares (relative weight (ratio) vs. other cgroups with cpu shares).
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Shares *uint64 `json:"shares,omitempty"`
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// CPU hardcap limit (in usecs). Allowed cpu time in a given period.
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Quota *uint64 `json:"quota,omitempty"`
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// CPU period to be used for hardcapping (in usecs).
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Period *uint64 `json:"period,omitempty"`
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// How much time realtime scheduling may use (in usecs).
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RealtimeRuntime *uint64 `json:"realtimeRuntime,omitempty"`
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// CPU period to be used for realtime scheduling (in usecs).
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RealtimePeriod *uint64 `json:"realtimePeriod,omitempty"`
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// CPUs to use within the cpuset. Default is to use any CPU available.
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Cpus *string `json:"cpus,omitempty"`
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// List of memory nodes in the cpuset. Default is to use any available memory node.
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Mems *string `json:"mems,omitempty"`
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}
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// Pids for Linux cgroup 'pids' resource management (Linux 4.3)
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type Pids struct {
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// Maximum number of PIDs. Default is "no limit".
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Limit *int64 `json:"limit,omitempty"`
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}
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// Network identification and priority configuration
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type Network struct {
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// Set class identifier for container's network packets
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ClassID *uint32 `json:"classID"`
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// Set priority of network traffic for container
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Priorities []InterfacePriority `json:"priorities,omitempty"`
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}
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// Resources has container runtime resource constraints
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type Resources struct {
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// Devices are a list of device rules for the whitelist controller
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Devices []DeviceCgroup `json:"devices"`
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// DisableOOMKiller disables the OOM killer for out of memory conditions
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DisableOOMKiller *bool `json:"disableOOMKiller,omitempty"`
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// Specify an oom_score_adj for the container.
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OOMScoreAdj *int `json:"oomScoreAdj,omitempty"`
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// Memory restriction configuration
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Memory *Memory `json:"memory,omitempty"`
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// CPU resource restriction configuration
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CPU *CPU `json:"cpu,omitempty"`
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// Task resource restriction configuration.
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Pids *Pids `json:"pids,omitempty"`
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// BlockIO restriction configuration
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BlockIO *BlockIO `json:"blockIO,omitempty"`
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// Hugetlb limit (in bytes)
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HugepageLimits []HugepageLimit `json:"hugepageLimits,omitempty"`
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// Network restriction configuration
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Network *Network `json:"network,omitempty"`
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}
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// Device represents the mknod information for a Linux special device file
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type Device struct {
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// Path to the device.
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Path string `json:"path"`
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// Device type, block, char, etc.
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Type string `json:"type"`
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// Major is the device's major number.
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Major int64 `json:"major"`
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// Minor is the device's minor number.
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Minor int64 `json:"minor"`
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// FileMode permission bits for the device.
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FileMode *os.FileMode `json:"fileMode,omitempty"`
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// UID of the device.
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UID *uint32 `json:"uid,omitempty"`
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// Gid of the device.
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GID *uint32 `json:"gid,omitempty"`
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}
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// DeviceCgroup represents a device rule for the whitelist controller
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type DeviceCgroup struct {
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// Allow or deny
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||
|
|
Allow bool `json:"allow"`
|
||
|
|
// Device type, block, char, etc.
|
||
|
|
Type *string `json:"type,omitempty"`
|
||
|
|
// Major is the device's major number.
|
||
|
|
Major *int64 `json:"major,omitempty"`
|
||
|
|
// Minor is the device's minor number.
|
||
|
|
Minor *int64 `json:"minor,omitempty"`
|
||
|
|
// Cgroup access permissions format, rwm.
|
||
|
|
Access *string `json:"access,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// Seccomp represents syscall restrictions
|
||
|
|
type Seccomp struct {
|
||
|
|
DefaultAction Action `json:"defaultAction"`
|
||
|
|
Architectures []Arch `json:"architectures"`
|
||
|
|
Syscalls []Syscall `json:"syscalls,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// Solaris contains platform specific configuration for Solaris application containers.
|
||
|
|
type Solaris struct {
|
||
|
|
// SMF FMRI which should go "online" before we start the container process.
|
||
|
|
Milestone string `json:"milestone,omitempty"`
|
||
|
|
// Maximum set of privileges any process in this container can obtain.
|
||
|
|
LimitPriv string `json:"limitpriv,omitempty"`
|
||
|
|
// The maximum amount of shared memory allowed for this container.
|
||
|
|
MaxShmMemory string `json:"maxShmMemory,omitempty"`
|
||
|
|
// Specification for automatic creation of network resources for this container.
|
||
|
|
Anet []Anet `json:"anet,omitempty"`
|
||
|
|
// Set limit on the amount of CPU time that can be used by container.
|
||
|
|
CappedCPU *CappedCPU `json:"cappedCPU,omitempty"`
|
||
|
|
// The physical and swap caps on the memory that can be used by this container.
|
||
|
|
CappedMemory *CappedMemory `json:"cappedMemory,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// CappedCPU allows users to set limit on the amount of CPU time that can be used by container.
|
||
|
|
type CappedCPU struct {
|
||
|
|
Ncpus string `json:"ncpus,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// CappedMemory allows users to set the physical and swap caps on the memory that can be used by this container.
|
||
|
|
type CappedMemory struct {
|
||
|
|
Physical string `json:"physical,omitempty"`
|
||
|
|
Swap string `json:"swap,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// Anet provides the specification for automatic creation of network resources for this container.
|
||
|
|
type Anet struct {
|
||
|
|
// Specify a name for the automatically created VNIC datalink.
|
||
|
|
Linkname string `json:"linkname,omitempty"`
|
||
|
|
// Specify the link over which the VNIC will be created.
|
||
|
|
Lowerlink string `json:"lowerLink,omitempty"`
|
||
|
|
// The set of IP addresses that the container can use.
|
||
|
|
Allowedaddr string `json:"allowedAddress,omitempty"`
|
||
|
|
// Specifies whether allowedAddress limitation is to be applied to the VNIC.
|
||
|
|
Configallowedaddr string `json:"configureAllowedAddress,omitempty"`
|
||
|
|
// The value of the optional default router.
|
||
|
|
Defrouter string `json:"defrouter,omitempty"`
|
||
|
|
// Enable one or more types of link protection.
|
||
|
|
Linkprotection string `json:"linkProtection,omitempty"`
|
||
|
|
// Set the VNIC's macAddress
|
||
|
|
Macaddress string `json:"macAddress,omitempty"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// Arch used for additional architectures
|
||
|
|
type Arch string
|
||
|
|
|
||
|
|
// Additional architectures permitted to be used for system calls
|
||
|
|
// By default only the native architecture of the kernel is permitted
|
||
|
|
const (
|
||
|
|
ArchX86 Arch = "SCMP_ARCH_X86"
|
||
|
|
ArchX86_64 Arch = "SCMP_ARCH_X86_64"
|
||
|
|
ArchX32 Arch = "SCMP_ARCH_X32"
|
||
|
|
ArchARM Arch = "SCMP_ARCH_ARM"
|
||
|
|
ArchAARCH64 Arch = "SCMP_ARCH_AARCH64"
|
||
|
|
ArchMIPS Arch = "SCMP_ARCH_MIPS"
|
||
|
|
ArchMIPS64 Arch = "SCMP_ARCH_MIPS64"
|
||
|
|
ArchMIPS64N32 Arch = "SCMP_ARCH_MIPS64N32"
|
||
|
|
ArchMIPSEL Arch = "SCMP_ARCH_MIPSEL"
|
||
|
|
ArchMIPSEL64 Arch = "SCMP_ARCH_MIPSEL64"
|
||
|
|
ArchMIPSEL64N32 Arch = "SCMP_ARCH_MIPSEL64N32"
|
||
|
|
ArchPPC Arch = "SCMP_ARCH_PPC"
|
||
|
|
ArchPPC64 Arch = "SCMP_ARCH_PPC64"
|
||
|
|
ArchPPC64LE Arch = "SCMP_ARCH_PPC64LE"
|
||
|
|
ArchS390 Arch = "SCMP_ARCH_S390"
|
||
|
|
ArchS390X Arch = "SCMP_ARCH_S390X"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Action taken upon Seccomp rule match
|
||
|
|
type Action string
|
||
|
|
|
||
|
|
// Define actions for Seccomp rules
|
||
|
|
const (
|
||
|
|
ActKill Action = "SCMP_ACT_KILL"
|
||
|
|
ActTrap Action = "SCMP_ACT_TRAP"
|
||
|
|
ActErrno Action = "SCMP_ACT_ERRNO"
|
||
|
|
ActTrace Action = "SCMP_ACT_TRACE"
|
||
|
|
ActAllow Action = "SCMP_ACT_ALLOW"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Operator used to match syscall arguments in Seccomp
|
||
|
|
type Operator string
|
||
|
|
|
||
|
|
// Define operators for syscall arguments in Seccomp
|
||
|
|
const (
|
||
|
|
OpNotEqual Operator = "SCMP_CMP_NE"
|
||
|
|
OpLessThan Operator = "SCMP_CMP_LT"
|
||
|
|
OpLessEqual Operator = "SCMP_CMP_LE"
|
||
|
|
OpEqualTo Operator = "SCMP_CMP_EQ"
|
||
|
|
OpGreaterEqual Operator = "SCMP_CMP_GE"
|
||
|
|
OpGreaterThan Operator = "SCMP_CMP_GT"
|
||
|
|
OpMaskedEqual Operator = "SCMP_CMP_MASKED_EQ"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Arg used for matching specific syscall arguments in Seccomp
|
||
|
|
type Arg struct {
|
||
|
|
Index uint `json:"index"`
|
||
|
|
Value uint64 `json:"value"`
|
||
|
|
ValueTwo uint64 `json:"valueTwo"`
|
||
|
|
Op Operator `json:"op"`
|
||
|
|
}
|
||
|
|
|
||
|
|
// Syscall is used to match a syscall in Seccomp
|
||
|
|
type Syscall struct {
|
||
|
|
Name string `json:"name"`
|
||
|
|
Action Action `json:"action"`
|
||
|
|
Args []Arg `json:"args,omitempty"`
|
||
|
|
}
|