package libpod import ( "net" "time" "github.com/containers/common/pkg/secrets" "github.com/containers/image/v5/manifest" "github.com/containers/podman/v3/pkg/namespaces" "github.com/containers/storage" "github.com/cri-o/ocicni/pkg/ocicni" spec "github.com/opencontainers/runtime-spec/specs-go" ) // ContainerConfig contains all information that was used to create the // container. It may not be changed once created. // It is stored, read-only, on disk in Libpod's State. // Any changes will not be written back to the database, and will cause // inconsistencies with other Libpod instances. type ContainerConfig struct { // Spec is OCI runtime spec used to create the container. This is passed // in when the container is created, but it is not the final spec used // to run the container - it will be modified by Libpod to add things we // manage (e.g. bind mounts for /etc/resolv.conf, named volumes, a // network namespace prepared by CNI or slirp4netns) in the // generateSpec() function. Spec *spec.Spec `json:"spec"` // ID is a hex-encoded 256-bit pseudorandom integer used as a unique // identifier for the container. IDs are globally unique in Libpod - // once an ID is in use, no other container or pod will be created with // the same one until the holder of the ID has been removed. // ID is generated by Libpod, and cannot be chosen or influenced by the // user (except when restoring a checkpointed container). // ID is guaranteed to be 64 characters long. ID string `json:"id"` // Name is a human-readable name for the container. All containers must // have a non-empty name. Name may be provided when the container is // created; if no name is chosen, a name will be auto-generated. Name string `json:"name"` // Pod is the full ID of the pod the container belongs to. If the // container does not belong to a pod, this will be empty. // If this is not empty, a pod with this ID is guaranteed to exist in // the state for the duration of this container's existence. Pod string `json:"pod,omitempty"` // Namespace is the libpod Namespace the container is in. // Namespaces are used to divide containers in the state. Namespace string `json:"namespace,omitempty"` // LockID is the ID of this container's lock. Each container, pod, and // volume is assigned a unique Lock (from one of several backends) by // the libpod Runtime. This lock will belong only to this container for // the duration of the container's lifetime. LockID uint32 `json:"lockID"` // CreateCommand is the full command plus arguments that were used to // create the container. It is shown in the output of Inspect, and may // be used to recreate an identical container for automatic updates or // portable systemd unit files. CreateCommand []string `json:"CreateCommand,omitempty"` // RawImageName is the raw and unprocessed name of the image when creating // the container (as specified by the user). May or may not be set. One // use case to store this data are auto-updates where we need the _exact_ // name and not some normalized instance of it. RawImageName string `json:"RawImageName,omitempty"` // IDMappings are UID/GID mappings used by the container's user // namespace. They are used by the OCI runtime when creating the // container, and by c/storage to ensure that the container's files have // the appropriate owner. IDMappings storage.IDMappingOptions `json:"idMappingsOptions,omitempty"` // Dependencies are the IDs of dependency containers. // These containers must be started before this container is started. Dependencies []string // embedded sub-configs ContainerRootFSConfig ContainerSecurityConfig ContainerNameSpaceConfig ContainerNetworkConfig ContainerImageConfig ContainerMiscConfig } // ContainerRootFSConfig is an embedded sub-config providing config info // about the container's root fs. type ContainerRootFSConfig struct { // RootfsImageID is the ID of the image used to create the container. // If the container was created from a Rootfs, this will be empty. // If non-empty, Podman will create a root filesystem for the container // based on an image with this ID. // This conflicts with Rootfs. RootfsImageID string `json:"rootfsImageID,omitempty"` // RootfsImageName is the (normalized) name of the image used to create // the container. If the container was created from a Rootfs, this will // be empty. RootfsImageName string `json:"rootfsImageName,omitempty"` // Rootfs is a directory to use as the container's root filesystem. // If RootfsImageID is set, this will be empty. // If this is set, Podman will not create a root filesystem for the // container based on an image, and will instead use the given directory // as the container's root. // Conflicts with RootfsImageID. Rootfs string `json:"rootfs,omitempty"` // ShmDir is the path to be mounted on /dev/shm in container. // If not set manually at creation time, Libpod will create a tmpfs // with the size specified in ShmSize and populate this with the path of // said tmpfs. ShmDir string `json:"ShmDir,omitempty"` // ShmSize is the size of the container's SHM. Only used if ShmDir was // not set manually at time of creation. ShmSize int64 `json:"shmSize"` // Static directory for container content that will persist across // reboot. // StaticDir is a persistent directory for Libpod files that will // survive system reboot. It is not part of the container's rootfs and // is not mounted into the container. It will be removed when the // container is removed. // Usually used to store container log files, files that will be bind // mounted into the container (e.g. the resolv.conf we made for the // container), and other per-container content. StaticDir string `json:"staticDir"` // Mounts contains all additional mounts into the container rootfs. // It is presently only used for the container's SHM directory. // These must be unmounted before the container's rootfs is unmounted. Mounts []string `json:"mounts,omitempty"` // NamedVolumes lists the Libpod named volumes to mount into the // container. Each named volume is guaranteed to exist so long as this // container exists. NamedVolumes []*ContainerNamedVolume `json:"namedVolumes,omitempty"` // OverlayVolumes lists the overlay volumes to mount into the container. OverlayVolumes []*ContainerOverlayVolume `json:"overlayVolumes,omitempty"` // ImageVolumes lists the image volumes to mount into the container. // Please note that this is named ctrImageVolumes in JSON to // distinguish between these and the old `imageVolumes` field in Podman // pre-1.8, which was used in very old Podman versions to determine how // image volumes were handled in Libpod (support for these eventually // moved out of Libpod into pkg/specgen). // Please DO NOT re-use the `imageVolumes` name in container JSON again. ImageVolumes []*ContainerImageVolume `json:"ctrImageVolumes,omitempty"` // CreateWorkingDir indicates that Libpod should create the container's // working directory if it does not exist. Some OCI runtimes do this by // default, but others do not. CreateWorkingDir bool `json:"createWorkingDir,omitempty"` // Secrets lists secrets to mount into the container Secrets []*secrets.Secret `json:"secrets,omitempty"` // SecretPath is the secrets location in storage SecretsPath string `json:"secretsPath"` // Volatile specifies whether the container storage can be optimized // at the cost of not syncing all the dirty files in memory. Volatile bool `json:"volatile,omitempty"` } // ContainerSecurityConfig is an embedded sub-config providing security configuration // to the container. type ContainerSecurityConfig struct { // Privileged is whether the container is privileged. Privileged // containers have lessened security and increased access to the system. // Note that this does NOT directly correspond to Podman's --privileged // flag - most of the work of that flag is done in creating the OCI spec // given to Libpod. This only enables a small subset of the overall // operation, mostly around mounting the container image with reduced // security. Privileged bool `json:"privileged"` // ProcessLabel is the SELinux process label for the container. ProcessLabel string `json:"ProcessLabel,omitempty"` // MountLabel is the SELinux mount label for the container's root // filesystem. Only used if the container was created from an image. // If not explicitly set, an unused random MLS label will be assigned by // containers/storage (but only if SELinux is enabled). MountLabel string `json:"MountLabel,omitempty"` // LabelOpts are options passed in by the user to setup SELinux labels. // These are used by the containers/storage library. LabelOpts []string `json:"labelopts,omitempty"` // User and group to use in the container. Can be specified as only user // (in which case we will attempt to look up the user in the container // to determine the appropriate group) or user and group separated by a // colon. // Can be specified by name or UID/GID. // If unset, this will default to UID and GID 0 (root). User string `json:"user,omitempty"` // Groups are additional groups to add the container's user to. These // are resolved within the container using the container's /etc/passwd. Groups []string `json:"groups,omitempty"` // AddCurrentUserPasswdEntry indicates that Libpod should ensure that // the container's /etc/passwd contains an entry for the user running // Libpod - mostly used in rootless containers where the user running // Libpod wants to retain their UID inside the container. AddCurrentUserPasswdEntry bool `json:"addCurrentUserPasswdEntry,omitempty"` } // ContainerNameSpaceConfig is an embedded sub-config providing // namespace configuration to the container. type ContainerNameSpaceConfig struct { // IDs of container to share namespaces with // NetNsCtr conflicts with the CreateNetNS bool // These containers are considered dependencies of the given container // They must be started before the given container is started IPCNsCtr string `json:"ipcNsCtr,omitempty"` MountNsCtr string `json:"mountNsCtr,omitempty"` NetNsCtr string `json:"netNsCtr,omitempty"` PIDNsCtr string `json:"pidNsCtr,omitempty"` UserNsCtr string `json:"userNsCtr,omitempty"` UTSNsCtr string `json:"utsNsCtr,omitempty"` CgroupNsCtr string `json:"cgroupNsCtr,omitempty"` } // ContainerNetworkConfig is an embedded sub-config providing network configuration // to the container. type ContainerNetworkConfig struct { // CreateNetNS indicates that libpod should create and configure a new // network namespace for the container. // This cannot be set if NetNsCtr is also set. CreateNetNS bool `json:"createNetNS"` // StaticIP is a static IP to request for the container. // This cannot be set unless CreateNetNS is set. // If not set, the container will be dynamically assigned an IP by CNI. StaticIP net.IP `json:"staticIP"` // StaticMAC is a static MAC to request for the container. // This cannot be set unless CreateNetNS is set. // If not set, the container will be dynamically assigned a MAC by CNI. StaticMAC net.HardwareAddr `json:"staticMAC"` // PortMappings are the ports forwarded to the container's network // namespace // These are not used unless CreateNetNS is true PortMappings []ocicni.PortMapping `json:"portMappings,omitempty"` // UseImageResolvConf indicates that resolv.conf should not be // bind-mounted inside the container. // Conflicts with DNSServer, DNSSearch, DNSOption. UseImageResolvConf bool // DNS servers to use in container resolv.conf // Will override servers in host resolv if set DNSServer []net.IP `json:"dnsServer,omitempty"` // DNS Search domains to use in container resolv.conf // Will override search domains in host resolv if set DNSSearch []string `json:"dnsSearch,omitempty"` // DNS options to be set in container resolv.conf // With override options in host resolv if set DNSOption []string `json:"dnsOption,omitempty"` // UseImageHosts indicates that /etc/hosts should not be // bind-mounted inside the container. // Conflicts with HostAdd. UseImageHosts bool // Hosts to add in container // Will be appended to host's host file HostAdd []string `json:"hostsAdd,omitempty"` // Network names (CNI) to add container to. Empty to use default network. // Please note that these can be altered at runtime. The actual list is // stored in the DB and should be retrieved from there; this is only the // set of networks the container was *created* with. Networks []string `json:"networks,omitempty"` // Network mode specified for the default network. NetMode namespaces.NetworkMode `json:"networkMode,omitempty"` // NetworkOptions are additional options for each network NetworkOptions map[string][]string `json:"network_options,omitempty"` // NetworkAliases are aliases that will be added to each network. // These are additional names that this container can be accessed as via // DNS when the CNI dnsname plugin is in use. // Please note that these can be altered at runtime. As such, the actual // list is stored in the database and should be retrieved from there; // this is only the set of aliases the container was *created with*. // Formatted as map of network name to aliases. All network names must // be present in the Networks list above. NetworkAliases map[string][]string `json:"network_alises,omitempty"` } // ContainerImageConfig is an embedded sub-config providing image configuration // to the container. type ContainerImageConfig struct { // UserVolumes contains user-added volume mounts in the container. // These will not be added to the container's spec, as it is assumed // they are already present in the spec given to Libpod. Instead, it is // used when committing containers to generate the VOLUMES field of the // image that is created, and for triggering some OCI hooks which do not // fire unless user-added volume mounts are present. UserVolumes []string `json:"userVolumes,omitempty"` // Entrypoint is the container's entrypoint. // It is not used in spec generation, but will be used when the // container is committed to populate the entrypoint of the new image. Entrypoint []string `json:"entrypoint,omitempty"` // Command is the container's command. // It is not used in spec generation, but will be used when the // container is committed to populate the command of the new image. Command []string `json:"command,omitempty"` } // ContainerMiscConfig is an embedded sub-config providing misc configuration // to the container. type ContainerMiscConfig struct { // Whether to keep container STDIN open Stdin bool `json:"stdin,omitempty"` // Labels is a set of key-value pairs providing additional information // about a container Labels map[string]string `json:"labels,omitempty"` // StopSignal is the signal that will be used to stop the container StopSignal uint `json:"stopSignal,omitempty"` // StopTimeout is the signal that will be used to stop the container StopTimeout uint `json:"stopTimeout,omitempty"` // Timeout is maximimum time a container will run before getting the kill signal Timeout uint `json:"timeout,omitempty"` // Time container was created CreatedTime time.Time `json:"createdTime"` // CgroupManager is the cgroup manager used to create this container. // If empty, the runtime default will be used. CgroupManager string `json:"cgroupManager,omitempty"` // NoCgroups indicates that the container will not create CGroups. It is // incompatible with CgroupParent. Deprecated in favor of CgroupsMode. NoCgroups bool `json:"noCgroups,omitempty"` // CgroupsMode indicates how the container will create cgroups // (disabled, no-conmon, enabled). It supersedes NoCgroups. CgroupsMode string `json:"cgroupsMode,omitempty"` // Cgroup parent of the container. CgroupParent string `json:"cgroupParent"` // LogPath log location LogPath string `json:"logPath"` // LogTag is the tag used for logging LogTag string `json:"logTag"` // LogSize is the tag used for logging LogSize int64 `json:"logSize"` // LogDriver driver for logs LogDriver string `json:"logDriver"` // File containing the conmon PID ConmonPidFile string `json:"conmonPidFile,omitempty"` // RestartPolicy indicates what action the container will take upon // exiting naturally. // Allowed options are "no" (take no action), "on-failure" (restart on // non-zero exit code, up an a maximum of RestartRetries times), // and "always" (always restart the container on any exit code). // The empty string is treated as the default ("no") RestartPolicy string `json:"restart_policy,omitempty"` // RestartRetries indicates the number of attempts that will be made to // restart the container. Used only if RestartPolicy is set to // "on-failure". RestartRetries uint `json:"restart_retries,omitempty"` // TODO log options for log drivers // PostConfigureNetNS needed when a user namespace is created by an OCI runtime // if the network namespace is created before the user namespace it will be // owned by the wrong user namespace. PostConfigureNetNS bool `json:"postConfigureNetNS"` // OCIRuntime used to create the container OCIRuntime string `json:"runtime,omitempty"` // ExitCommand is the container's exit command. // This Command will be executed when the container exits by Conmon. // It is usually used to invoke post-run cleanup - for example, in // Podman, it invokes `podman container cleanup`, which in turn calls // Libpod's Cleanup() API to unmount the container and clean up its // network. ExitCommand []string `json:"exitCommand,omitempty"` // IsInfra is a bool indicating whether this container is an infra container used for // sharing kernel namespaces in a pod IsInfra bool `json:"pause"` // SdNotifyMode tells libpod what to do with a NOTIFY_SOCKET if passed SdNotifyMode string `json:"sdnotifyMode,omitempty"` // Systemd tells libpod to setup the container in systemd mode Systemd bool `json:"systemd"` // HealthCheckConfig has the health check command and related timings HealthCheckConfig *manifest.Schema2HealthConfig `json:"healthcheck"` // PreserveFDs is a number of additional file descriptors (in addition // to 0, 1, 2) that will be passed to the executed process. The total FDs // passed will be 3 + PreserveFDs. PreserveFDs uint `json:"preserveFds,omitempty"` // Timezone is the timezone inside the container. // Local means it has the same timezone as the host machine Timezone string `json:"timezone,omitempty"` // Umask is the umask inside the container. Umask string `json:"umask,omitempty"` // PidFile is the file that saves the pid of the container process PidFile string `json:"pid_file,omitempty"` // CDIDevices contains devices that use the CDI CDIDevices []string `json:"cdiDevices,omitempty"` }