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Diffstat (limited to 'pkg/specgen/specgen.go')
| -rw-r--r-- | pkg/specgen/specgen.go | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/pkg/specgen/specgen.go b/pkg/specgen/specgen.go new file mode 100644 index 000000000..d59e8025b --- /dev/null +++ b/pkg/specgen/specgen.go @@ -0,0 +1,363 @@ +package specgen + +import ( + "net" + + "github.com/containers/libpod/libpod" + spec "github.com/opencontainers/runtime-spec/specs-go" +) + +// TODO +type Namespace struct { +} + +// ContainerBasicConfig contains the basic parts of a container. +type ContainerBasicConfig struct { + // Name is the name the container will be given. + // If no name is provided, one will be randomly generated. + // Optional. + Name string + // Pod is the ID of the pod the container will join. + // Optional. + Pod string + // Entrypoint is the container's entrypoint. + // If not given and Image is specified, this will be populated by the + // image's configuration. + // Optional. + Entrypoint []string + // Command is the container's command. + // If not given and Image is specified, this will be populated by the + // image's configuration. + // Optional. + Command []string + // Env is a set of environment variables that will be set in the + // container. + // Optional. + Env map[string]string + // Terminal is whether the container will create a PTY. + Terminal bool + // Stdin is whether the container will keep its STDIN open. + Stdin bool + // Labels are key-valid labels that are used to add metadata to + // containers. + // Optional. + Labels map[string]string + // Annotations are key-value options passed into the container runtime + // that can be used to trigger special behavior. + // Optional. + Annotations map[string]string + // StopSignal is the signal that will be used to stop the container. + // Must be a non-zero integer below SIGRTMAX. + // If not provided, the default, SIGTERM, will be used. + // Will conflict with Systemd if Systemd is set to "true" or "always". + // Optional. + StopSignal *uint + // StopTimeout is a timeout between the container's stop signal being + // sent and SIGKILL being sent. + // If not provided, the default will be used. + // If 0 is used, stop signal will not be sent, and SIGKILL will be sent + // instead. + // Optional. + StopTimeout *uint + // LogDriver is the container's log driver. + // Optional. + LogDriver string + // LogPath is the path the container's logs will be stored at. + // Only available if LogDriver is set to "json-file" or "k8s-file". + // Optional. + LogPath string + // ConmonPidFile is a path at which a PID file for Conmon will be + // placed. + // If not given, a default location will be used. + // Optional. + ConmonPidFile string + // RestartPolicy is the container's restart policy - an action which + // will be taken when the container exits. + // If not given, the default policy, which does nothing, will be used. + // Optional. + RestartPolicy string + // RestartRetries is the number of attempts that will be made to restart + // the container. + // Only available when RestartPolicy is set to "on-failure". + // Optional. + RestartRetries *uint + // OCIRuntime is the name of the OCI runtime that will be used to create + // the container. + // If not specified, the default will be used. + // Optional. + OCIRuntime string + // Systemd is whether the container will be started in systemd mode. + // Valid options are "true", "false", and "always". + // "true" enables this mode only if the binary run in the container is + // /sbin/init or systemd. "always" unconditionally enables systemd mode. + // "false" unconditionally disables systemd mode. + // If enabled, mounts and stop signal will be modified. + // If set to "always" or set to "true" and conditionally triggered, + // conflicts with StopSignal. + // If not specified, "false" will be assumed. + // Optional. + Systemd string + // Namespace is the libpod namespace the container will be placed in. + // Optional. + Namespace string + + // PidNS is the container's PID namespace. + // It defaults to private. + // Mandatory. + PidNS Namespace + + // UtsNS is the container's UTS namespace. + // It defaults to private. + // Must be set to Private to set Hostname. + // Mandatory. + UtsNS Namespace + // Hostname is the container's hostname. If not set, the hostname will + // not be modified (if UtsNS is not private) or will be set to the + // container ID (if UtsNS is private). + // Conflicts with UtsNS if UtsNS is not set to private. + // Optional. + Hostname string +} + +// ContainerStorageConfig contains information on the storage configuration of a +// container. +type ContainerStorageConfig struct { + // Image is the image the container will be based on. The image will be + // used as the container's root filesystem, and its environment vars, + // volumes, and other configuration will be applied to the container. + // Conflicts with Rootfs. + // At least one of Image or Rootfs must be specified. + Image string + // Rootfs is the path to a directory that will be used as the + // container's root filesystem. No modification will be made to the + // directory, it will be directly mounted into the container as root. + // Conflicts with Image. + // At least one of Image or Rootfs must be specified. + Rootfs string + // ImageVolumeMode indicates how image volumes will be created. + // Supported modes are "ignore" (do not create), "tmpfs" (create as + // tmpfs), and "anonymous" (create as anonymous volumes). + // The default is anonymous. + // Optional. + ImageVolumeMode string + // VolumesFrom is a list of containers whose volumes will be added to + // this container. Supported mount options may be added after the + // container name with a : and include "ro" and "rw". + // Optional. + VolumesFrom []string + // Mounts are mounts that will be added to the container. + // These will supersede Image Volumes and VolumesFrom volumes where + // there are conflicts. + // Optional. + Mounts []spec.Mount + // Volumes are named volumes that will be added to the container. + // These will supersede Image Volumes and VolumesFrom volumes where + // there are conflicts. + // Optional. + Volumes []*libpod.ContainerNamedVolume + // Devices are devices that will be added to the container. + // Optional. + Devices []spec.LinuxDevice + // IpcNS is the container's IPC namespace. + // Default is private. + // Conflicts with ShmSize if not set to private. + // Mandatory. + IpcNS Namespace + // ShmSize is the size of the tmpfs to mount in at /dev/shm, in bytes. + // Conflicts with ShmSize if ShmSize is not private. + // Optional. + ShmSize *int64 + // WorkDir is the container's working directory. + // If unset, the default, /, will be used. + // Optional. + WorkDir string + // RootfsPropagation is the rootfs propagation mode for the container. + // If not set, the default of rslave will be used. + // Optional. + RootfsPropagation string +} + +// ContainerSecurityConfig is a container's security features, including +// SELinux, Apparmor, and Seccomp. +type ContainerSecurityConfig struct { + // Privileged is whether the container is privileged. + // Privileged does the following: + // - Adds all devices on the system to the container. + // - Adds all capabilities to the container. + // - Disables Seccomp, SELinux, and Apparmor confinement. + // TODO: this conflicts with things. + // TODO: this does more. + Privileged bool + // User is the user the container will be run as. + // Can be given as a UID or a username; if a username, it will be + // resolved within the container, using the container's /etc/passwd. + // If unset, the container will be run as root. + // Optional. + User string + // Groups are a list of supplemental groups the container's user will + // be granted access to. + // Optional. + Groups []string + // CapAdd are capabilities which will be added to the container. + // Conflicts with Privileged. + // Optional. + CapAdd []string + // CapDrop are capabilities which will be removed from the container. + // Conflicts with Privileged. + // Optional. + CapDrop []string + // SelinuxProcessLabel is the process label the container will use. + // If SELinux is enabled and this is not specified, a label will be + // automatically generated if not specified. + // Optional. + SelinuxProcessLabel string + // SelinuxMountLabel is the mount label the container will use. + // If SELinux is enabled and this is not specified, a label will be + // automatically generated if not specified. + // Optional. + SelinuxMountLabel string + // SelinuxOpts are options for configuring SELinux. + // Optional. + SelinuxOpts []string + // ApparmorProfile is the name of the Apparmor profile the container + // will use. + // Optional. + ApparmorProfile string + // SeccompProfilePath is the path to a JSON file containing the + // container's Seccomp profile. + // If not specified, no Seccomp profile will be used. + // Optional. + SeccompProfilePath string + // NoNewPrivileges is whether the container will set the no new + // privileges flag on create, which disables gaining additional + // privileges (e.g. via setuid) in the container. + NoNewPrivileges bool + // UserNS is the container's user namespace. + // It defaults to host, indicating that no user namespace will be + // created. + // If set to private, IDMappings must be set. + // Mandatory. + UserNS Namespace + // IDMappings are UID and GID mappings that will be used by user + // namespaces. + // Required if UserNS is private. + IDMappings storage.IDMappingOptions +} + +// ContainerCgroupConfig contains configuration information about a container's +// cgroups. +type ContainerCgroupConfig struct { + // CgroupNS is the container's cgroup namespace. + // It defaults to private. + // Conflicts with NoCgroups if not set to host. + // Mandatory. + CgroupNS Namespace + // NoCgroups indicates that the container should not create CGroups. + // Conflicts with CgroupParent and CgroupNS if CgroupNS is not set to + // host. + NoCgroups bool + // CgroupParent is the container's CGroup parent. + // If not set, the default for the current cgroup driver will be used. + // Conflicts with NoCgroups. + // Optional. + CgroupParent string +} + +// ContainerNetworkConfig contains information on a container's network +// configuration. +type ContainerNetworkConfig struct { + // NetNS is the configuration to use for the container's network + // namespace. + // Mandatory. + NetNS Namespace + // ConfigureNetNS is whether Libpod will configure the container's + // network namespace to send and receive traffic. + // Only available is NetNS is private - conflicts with other NetNS + // modes. + ConfigureNetNS bool + // StaticIP is the a IPv4 address of the container. + // Only available if ConfigureNetNS is true. + // Optional. + StaticIP *net.IP + // StaticIPv6 is a static IPv6 address to set in the container. + // Only available if ConfigureNetNS is true. + // Optional. + StaticIPv6 *net.IP + // StaticMAC is a static MAC address to set in the container. + // Only available if ConfigureNetNS is true. + // Optional. + StaticMAC *net.HardwareAddr + // PortBindings is a set of ports to map into the container. + // Only available if ConfigureNetNS is true. + // Optional. + PortMappings []ocicni.PortMapping + // PublishImagePorts will publish ports specified in the image to random + // ports outside. + // Requires Image to be set. + PublishImagePorts bool + // CNINetworks is a list of CNI networks to join the container to. + // If this list is empty, the default CNI network will be joined + // instead. If at least one entry is present, we will not join the + // default network (unless it is part of this list). + // Only available if ConfigureNetNS is true. + // Optional. + CNINetworks []string + // UseImageResolvConf indicates that resolv.conf should not be managed + // by Podman, but instead sourced from the image. + // Conflicts with DNSServer, DNSSearch, DNSOption. + UseImageResolvConf bool + // DNSServer is a set of DNS servers that will be used in the + // container's resolv.conf, replacing the host's DNS Servers which are + // used by default. + // Conflicts with UseImageResolvConf. + // Optional. + DNSServer []net.IP + // DNSSearch is a set of DNS search domains that will be used in the + // container's resolv.conf, replacing the host's DNS search domains + // which are used by default. + // Conflicts with UseImageResolvConf. + // Optional. + DNSSearch []string + // DNSOption is a set of DNS options that will be used in the + // container's resolv.conf, replacing the host's DNS options which are + // used by default. + // Conflicts with UseImageResolvConf. + // Optional. + DNSOption []string + // UseImageHosts indicates that /etc/hosts should not be managed by + // Podman, and instead sourced from the image. + // Conflicts with HostAdd. + UseImageHosts bool + // HostAdd is a set of hosts which will be added to the container's + // /etc/hosts file. + // Conflicts with UseImageHosts. + // Optional. + HostAdd []string +} + +// ContainerResourceConfig contains information on container resource limits. +type ContainerResourceConfig struct { + // ResourceLimits are resource limits to apply to the container. + // Can only be set as root on cgroups v1 systems, but can be set as + // rootless as well for cgroups v2. + // Optional. + ResourceLimits *spec.LinuxResources + // Rlimits are POSIX rlimits to apply to the container. + // Optional. + Rlimits []spec.POSIXRlimit + // OOMScoreAdj adjusts the score used by the OOM killer to determine + // processes to kill for the container's process. + // Optional. + OOMScoreAdj *int +} + +// SpecGenerator creates an OCI spec and Libpod configuration options to create +// a container based on the given configuration. +type SpecGenerator struct { + ContainerBasicConfig + ContainerStorageConfig + ContainerSecurityConfig + ContainerCgroupConfig + ContainerNetworkConfig + ContainerResourceConfig +} |