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Merge pull request #7027 from ldelossa/louis/refactor-container-config

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TODO: Refactor container config
This commit is contained in:
OpenShift Merge Robot 2020-07-27 16:35:20 +02:00 committed by GitHub
parent 55a7faf2b8 10c4ab1149
commit 5e9b54f954
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 300 additions and 257 deletions
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62
libpod/common_test.go
View file

@ -19,33 +19,41 @@ import (
func getTestContainer(id, name string, manager lock.Manager) (*Container, error) {
ctr := &Container{
config: &ContainerConfig{
ID: id,
Name: name,
RootfsImageID: id,
RootfsImageName: "testimg",
StaticDir: "/does/not/exist/",
LogPath: "/does/not/exist/",
Stdin: true,
Labels: map[string]string{"a": "b", "c": "d"},
StopSignal: 0,
StopTimeout: 0,
CreatedTime: time.Now(),
Privileged: true,
Mounts: []string{"/does/not/exist"},
DNSServer: []net.IP{net.ParseIP("192.168.1.1"), net.ParseIP("192.168.2.2")},
DNSSearch: []string{"example.com", "example.example.com"},
PortMappings: []ocicni.PortMapping{
{
HostPort: 80,
ContainerPort: 90,
Protocol: "tcp",
HostIP: "192.168.3.3",
},
{
HostPort: 100,
ContainerPort: 110,
Protocol: "udp",
HostIP: "192.168.4.4",
ID: id,
Name: name,
ContainerRootFSConfig: ContainerRootFSConfig{
RootfsImageID: id,
RootfsImageName: "testimg",
StaticDir: "/does/not/exist/",
Mounts: []string{"/does/not/exist"},
},
ContainerMiscConfig: ContainerMiscConfig{
LogPath: "/does/not/exist/",
Stdin: true,
Labels: map[string]string{"a": "b", "c": "d"},
StopSignal: 0,
StopTimeout: 0,
CreatedTime: time.Now(),
},
ContainerSecurityConfig: ContainerSecurityConfig{
Privileged: true,
},
ContainerNetworkConfig: ContainerNetworkConfig{
DNSServer: []net.IP{net.ParseIP("192.168.1.1"), net.ParseIP("192.168.2.2")},
DNSSearch: []string{"example.com", "example.example.com"},
PortMappings: []ocicni.PortMapping{
{
HostPort: 80,
ContainerPort: 90,
Protocol: "tcp",
HostIP: "192.168.3.3",
},
{
HostPort: 100,
ContainerPort: 110,
Protocol: "udp",
HostIP: "192.168.4.4",
},
},
},
},

231
libpod/container.go
View file

@ -15,7 +15,6 @@ import (
"github.com/containers/image/v5/manifest"
"github.com/containers/libpod/v2/libpod/define"
"github.com/containers/libpod/v2/libpod/lock"
"github.com/containers/libpod/v2/pkg/namespaces"
"github.com/containers/libpod/v2/pkg/rootless"
"github.com/containers/libpod/v2/utils"
"github.com/containers/storage"
@ -215,233 +214,6 @@ type ContainerState struct {
containerPlatformState
}
// 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
type ContainerConfig struct {
Spec *spec.Spec `json:"spec"`
ID string `json:"id"`
Name string `json:"name"`
// Full ID of the pood the container belongs to
Pod string `json:"pod,omitempty"`
// Namespace the container is in
Namespace string `json:"namespace,omitempty"`
// ID of this container's lock
LockID uint32 `json:"lockID"`
// CreateCommand is the full command plus arguments of the process the
// container has been created with.
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"`
// TODO consider breaking these subsections up into smaller structs
// UID/GID mappings used by the storage
IDMappings storage.IDMappingOptions `json:"idMappingsOptions,omitempty"`
// Information on the image used for the root filesystem
RootfsImageID string `json:"rootfsImageID,omitempty"`
RootfsImageName string `json:"rootfsImageName,omitempty"`
// Rootfs to use for the container, this conflicts with RootfsImageID
Rootfs string `json:"rootfs,omitempty"`
// Src path to be mounted on /dev/shm in container.
ShmDir string `json:"ShmDir,omitempty"`
// Size of the container's SHM.
ShmSize int64 `json:"shmSize"`
// Static directory for container content that will persist across
// reboot.
StaticDir string `json:"staticDir"`
// Mounts list contains all additional mounts into the container rootfs.
// These include the SHM mount.
// These must be unmounted before the container's rootfs is unmounted.
Mounts []string `json:"mounts,omitempty"`
// NamedVolumes lists the named volumes to mount into the container.
NamedVolumes []*ContainerNamedVolume `json:"namedVolumes,omitempty"`
// OverlayVolumes lists the overlay volumes to mount into the container.
OverlayVolumes []*ContainerOverlayVolume `json:"overlayVolumes,omitempty"`
// Security Config
// Whether the container is privileged
Privileged bool `json:"privileged"`
// SELinux process label for container
ProcessLabel string `json:"ProcessLabel,omitempty"`
// SELinux mount label for root filesystem
MountLabel string `json:"MountLabel,omitempty"`
// LabelOpts are options passed in by the user to setup SELinux labels
LabelOpts []string `json:"labelopts,omitempty"`
// User and group to use in the container
// Can be specified by name or UID/GID
User string `json:"user,omitempty"`
// Additional groups to add
Groups []string `json:"groups,omitempty"`
// AddCurrentUserPasswdEntry indicates that the current user passwd entry
// should be added to the /etc/passwd within the container
AddCurrentUserPasswdEntry bool `json:"addCurrentUserPasswdEntry,omitempty"`
// Namespace Config
// 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"`
// IDs of dependency containers.
// These containers must be started before this container is started.
Dependencies []string
// Network Config
// 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.
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"`
// Image Config
// 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"`
// Misc Options
// 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"`
// Time container was created
CreatedTime time.Time `json:"createdTime"`
// 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"`
// 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
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"`
}
// ContainerNamedVolume is a named volume that will be mounted into the
// container. Each named volume is a libpod Volume present in the state.
type ContainerNamedVolume struct {
@ -1277,10 +1049,13 @@ func (c *Container) AutoRemove() bool {
return c.Spec().Annotations[define.InspectAnnotationAutoremove] == define.InspectResponseTrue
}
// Timezone returns the timezone configured inside the container.
// Local means it has the same timezone as the host machine
func (c *Container) Timezone() string {
return c.config.Timezone
}
// Umask returns the Umask bits configured inside the container.
func (c *Container) Umask() string {
return c.config.Umask
}

256
libpod/container_config.go Normal file
View file

@ -0,0 +1,256 @@
package libpod
import (
"net"
"time"
"github.com/containers/image/v5/manifest"
"github.com/containers/libpod/v2/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
type ContainerConfig struct {
Spec *spec.Spec `json:"spec"`
ID string `json:"id"`
Name string `json:"name"`
// Full ID of the pood the container belongs to
Pod string `json:"pod,omitempty"`
// Namespace the container is in
Namespace string `json:"namespace,omitempty"`
// ID of this container's lock
LockID uint32 `json:"lockID"`
// CreateCommand is the full command plus arguments of the process the
// container has been created with.
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"`
// UID/GID mappings used by the storage
IDMappings storage.IDMappingOptions `json:"idMappingsOptions,omitempty"`
// 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 string `json:"rootfsImageID,omitempty"`
RootfsImageName string `json:"rootfsImageName,omitempty"`
// Rootfs to use for the container, this conflicts with RootfsImageID
Rootfs string `json:"rootfs,omitempty"`
// Src path to be mounted on /dev/shm in container.
ShmDir string `json:"ShmDir,omitempty"`
// Size of the container's SHM.
ShmSize int64 `json:"shmSize"`
// Static directory for container content that will persist across
// reboot.
StaticDir string `json:"staticDir"`
// Mounts list contains all additional mounts into the container rootfs.
// These include the SHM mount.
// These must be unmounted before the container's rootfs is unmounted.
Mounts []string `json:"mounts,omitempty"`
// NamedVolumes lists the named volumes to mount into the container.
NamedVolumes []*ContainerNamedVolume `json:"namedVolumes,omitempty"`
// OverlayVolumes lists the overlay volumes to mount into the container.
OverlayVolumes []*ContainerOverlayVolume `json:"overlayVolumes,omitempty"`
}
// ContainerSecurityConfig is an embedded sub-config providing security configuration
// to the container.
type ContainerSecurityConfig struct {
// Whether the container is privileged
Privileged bool `json:"privileged"`
// SELinux process label for container
ProcessLabel string `json:"ProcessLabel,omitempty"`
// SELinux mount label for root filesystem
MountLabel string `json:"MountLabel,omitempty"`
// LabelOpts are options passed in by the user to setup SELinux labels
LabelOpts []string `json:"labelopts,omitempty"`
// User and group to use in the container
// Can be specified by name or UID/GID
User string `json:"user,omitempty"`
// Additional groups to add
Groups []string `json:"groups,omitempty"`
// AddCurrentUserPasswdEntry indicates that the current user passwd entry
// should be added to the /etc/passwd within 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.
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"`
}
// 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"`
// Time container was created
CreatedTime time.Time `json:"createdTime"`
// 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"`
// 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
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"`
}

4
libpod/container_internal_linux_test.go
View file

@ -20,8 +20,10 @@ func TestGenerateUserPasswdEntry(t *testing.T) {
c := Container{
config: &ContainerConfig{
User: "123:456",
Spec: &spec.Spec{},
ContainerSecurityConfig: ContainerSecurityConfig{
User: "123:456",
},
},
state: &ContainerState{
Mountpoint: "/does/not/exist/tmp/",

4
libpod/container_internal_test.go
View file

@ -35,7 +35,9 @@ func TestPostDeleteHooks(t *testing.T) {
"a": "b",
},
},
StaticDir: dir, // not the bundle, but good enough for this test
ContainerRootFSConfig: ContainerRootFSConfig{
StaticDir: dir, // not the bundle, but good enough for this test
},
},
state: &ContainerState{
ExtensionStageHooks: map[string][]rspec.Hook{