controller

package
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 Go to latest Published: Jul 17, 2020 License: Apache-2.0 Imports: 38 Imported by: 0

Documentation

Overview

Package controller provides Kubernetes controller/pod/container spec items used for many Ceph daemons

Index

Constants

View Source 
const (
	// CephVersionLabelKey is the key used for reporting the Ceph version which Rook has detected is
	// configured for the labeled resource.
	CephVersionLabelKey = "ceph-version"
)
View Source 
const (
	// ConfigInitContainerName is the name which is given to the config initialization container
	// in all Ceph pods.
	ConfigInitContainerName = "config-init"
)
View Source 
const OperatorSettingConfigMapName string = "rook-ceph-operator-config"

OperatorSettingConfigMapName refers to ConfigMap that configures rook ceph operator

Variables

View Source 
var (
	// ImmediateRetryResult Return this for a immediate retry of the reconciliation loop with the same request object.
	ImmediateRetryResult = reconcile.Result{Requeue: true}

	// WaitForRequeueIfCephClusterNotReady waits for the CephCluster to be ready
	WaitForRequeueIfCephClusterNotReady = reconcile.Result{Requeue: true, RequeueAfter: 10 * time.Second}

	// WaitForRequeueIfFinalizerBlocked waits for resources to be cleaned up before the finalizer can be removed
	WaitForRequeueIfFinalizerBlocked = reconcile.Result{Requeue: true, RequeueAfter: 10 * time.Second}

	// OperatorCephBaseImageVersion is the ceph version in the operator image
	OperatorCephBaseImageVersion string
)
View Source 
var ClusterResource = k8sutil.CustomResource{
	Name:       "cephcluster",
	Plural:     "cephclusters",
	Group:      cephv1.CustomResourceGroup,
	Version:    cephv1.Version,
	Kind:       reflect.TypeOf(cephv1.CephCluster{}).Name(),
	APIVersion: fmt.Sprintf("%s/%s", cephv1.CustomResourceGroup, cephv1.Version),
}

ClusterResource operator-kit Custom Resource Definition

Functions

func AddCephVersionLabelToDaemonSet 

func AddCephVersionLabelToDaemonSet(cephVersion version.CephVersion, d *apps.DaemonSet)

AddCephVersionLabelToDaemonSet adds a label reporting the Ceph version which Rook has detected is running in the DaemonSet's pods.

func AddCephVersionLabelToDeployment 

func AddCephVersionLabelToDeployment(cephVersion version.CephVersion, d *apps.Deployment)

AddCephVersionLabelToDeployment adds a label reporting the Ceph version which Rook has detected is running in the Deployment's pods.

func AddCephVersionLabelToJob 

func AddCephVersionLabelToJob(cephVersion version.CephVersion, j *batch.Job)

AddCephVersionLabelToJob adds a label reporting the Ceph version which Rook has detected is running in the Job's pods.

func AddCephVersionLabelToObjectMeta 

func AddCephVersionLabelToObjectMeta(cephVersion version.CephVersion, meta *metav1.ObjectMeta)

func AddFinalizerIfNotPresent 

func AddFinalizerIfNotPresent(client client.Client, obj runtime.Object) error

AddFinalizerIfNotPresent adds a finalizer an object to avoid instant deletion of the object without finalizing it.

func AddVolumeMountSubPath 

func AddVolumeMountSubPath(podSpec *v1.PodSpec, volumeMountName string)

AddVolumeMountSubPath updates each init and regular container of the podspec such that each volume mount attached to a container is mounted under a subpath in the source volume. This is important because some daemons may not start if the volume mount directory is non-empty. When the volume is the root of an ext4 file system, one may find a "lost+found" directory.

func AdminFlags 

func AdminFlags(cluster *cephconfig.ClusterInfo) []string

AdminFlags returns the command line flags used for Ceph commands requiring admin authentication.

func AppLabels 

func AppLabels(appName, namespace string) map[string]string

AppLabels returns labels common for all Rook-Ceph applications which may be useful for admins. App name is the name of the application: e.g., 'rook-ceph-mon', 'rook-ceph-mgr', etc.

func CephVolumeMounts 

func CephVolumeMounts(dataPaths *config.DataPathMap, confGeneratedInPod bool) []v1.VolumeMount

CephVolumeMounts returns the common list of Kubernetes volume mounts for Ceph containers. This function is only used for OSDs.

func CheckPodMemory 

func CheckPodMemory(resources v1.ResourceRequirements, cephPodMinimumMemory uint64) error

CheckPodMemory verify pod's memory limit is valid

func ChownCephDataDirsInitContainer 

func ChownCephDataDirsInitContainer(
	dpm config.DataPathMap,
	containerImage string,
	volumeMounts []v1.VolumeMount,
	resources v1.ResourceRequirements,
	securityContext *v1.SecurityContext,
) v1.Container

ChownCephDataDirsInitContainer returns an init container which `chown`s the given data directories as the `ceph:ceph` user in the container. It also `chown`s the Ceph log dir in the container automatically. Doing a chown in a post start lifecycle hook does not reliably complete before the OSD process starts, which can cause the pod to fail without the lifecycle hook's chown command completing. It can take an arbitrarily long time for a pod restart to successfully chown the directory. This is a race condition for all daemons; therefore, do this in an init container. See more discussion here: https://github.com/rook/rook/pull/3594#discussion_r312279176

func ClusterOwnerRef 

func ClusterOwnerRef(clusterName, clusterID string) metav1.OwnerReference

ClusterOwnerRef represents the owner reference of the CephCluster CR

func ContainerEnvVarReference 

func ContainerEnvVarReference(envVarName string) string

ContainerEnvVarReference returns a reference to a Kubernetes container env var of the given name which can be used in command or argument fields.

func CreateOrUpdateObject 

func CreateOrUpdateObject(client client.Client, obj runtime.Object) error

CreateOrUpdateObject updates an object with a given status

func DaemonEnvVars 

func DaemonEnvVars(image string) []v1.EnvVar

DaemonEnvVars returns the container environment variables used by all Ceph daemons.

func DaemonFlags 

func DaemonFlags(cluster *cephconfig.ClusterInfo, daemonID string) []string

DaemonFlags returns the command line flags used by all Ceph daemons.

func DaemonVolumeMounts 

func DaemonVolumeMounts(dataPaths *config.DataPathMap, keyringResourceName string) []v1.VolumeMount

DaemonVolumeMounts returns volume mounts which correspond to the DaemonVolumes. These volume mounts are shared by most all Ceph daemon containers, both init and standard. If keyring resource name is empty, there will be no keyring mounted in the container.

func DaemonVolumes 

func DaemonVolumes(dataPaths *config.DataPathMap, keyringResourceName string) []v1.Volume

DaemonVolumes returns the pod volumes used by all Ceph daemons. If keyring resource name is empty, there will be no keyring volume created from a secret.

func DaemonVolumesBase 

func DaemonVolumesBase(dataPaths *config.DataPathMap, keyringResourceName string) []v1.Volume

DaemonVolumesBase returns the common / static set of volumes.

func DaemonVolumesContainsPVC 

func DaemonVolumesContainsPVC(volumes []v1.Volume) bool

DaemonVolumesContainsPVC returns true if a volume exists with a volume source configured with a persistent volume claim.

func DaemonVolumesDataHostPath 

func DaemonVolumesDataHostPath(dataPaths *config.DataPathMap) []v1.Volume

DaemonVolumesDataHostPath returns HostPath volume source for daemon container data.

func DaemonVolumesDataPVC 

func DaemonVolumesDataPVC(pvcName string) v1.Volume

DaemonVolumesDataPVC returns a PVC volume source for daemon container data.

func ExtractCephVersionFromLabel 

func ExtractCephVersionFromLabel(labelVersion string) (*version.CephVersion, error)

ExtractCephVersionFromLabel returns a CephVersion struct deserialized from a provided version label.

func GenerateLivenessProbeExecDaemon 

func GenerateLivenessProbeExecDaemon(daemonType, daemonID string) *v1.Probe

GenerateLivenessProbeExecDaemon makes sure a daemon has a socket and that it can be called and returns 0

func GenerateMinimalCephConfInitContainer 

func GenerateMinimalCephConfInitContainer(
	username, keyringPath string,
	containerImage string,
	volumeMounts []v1.VolumeMount,
	resources v1.ResourceRequirements,
	securityContext *v1.SecurityContext,
) v1.Container

GenerateMinimalCephConfInitContainer returns an init container that will generate the most basic Ceph config for connecting non-Ceph daemons to a Ceph cluster (e.g., nfs-ganesha). Effectively what this means is that it generates '/etc/ceph/ceph.conf' with 'mon_host' populated and a keyring path associated with the user given. 'mon_host' is determined by the 'ROOK_CEPH_MON_HOST' env var present in other Ceph daemon pods, and the keyring is expected to be mounted into the container with a Kubernetes pod volume+mount.

func GetCephVersionLabel 

func GetCephVersionLabel(cephVersion version.CephVersion) string

GetCephVersionLabel returns a formatted serialization of a provided CephVersion for use in resource labels.

func GetControllerObjectOwnerReference 

func GetControllerObjectOwnerReference(object metav1.Object, scheme *runtime.Scheme) (*metav1.OwnerReference, error)

GetControllerObjectOwnerReference returns the owner reference that should be used by all child objects of a given controller

func GetImageVersion 

func GetImageVersion(cephCluster cephv1.CephCluster) (*cephver.CephVersion, error)

GetImageVersion returns the CephVersion registered for a specified image (if any) and whether any image was found.

func IsReadyToReconcile 

func IsReadyToReconcile(c client.Client, clustercontext *clusterd.Context, namespacedName types.NamespacedName, controllerName string) (cephv1.CephCluster, bool, bool, reconcile.Result)

IsReadyToReconcile determines if a controller is ready to reconcile or not

func ObjectToCRMapper 

func ObjectToCRMapper(c client.Client, ro runtime.Object, scheme *runtime.Scheme) (handler.Mapper, error)

ObjectToCRMapper returns the list of a given object type metadata It is used to trigger a reconcile object Kind A when watching object Kind B So we reconcile Kind A instead of Kind B For instance, we watch for CephCluster CR changes but want to reconcile CephFilesystem based on a Spec change

func PodLabels 

func PodLabels(appName, namespace, daemonType, daemonID string) map[string]string

PodLabels returns pod labels common to all Rook-Ceph pods which may be useful for admins. App name is the name of the application: e.g., 'rook-ceph-mon', 'rook-ceph-mgr', etc. Daemon type is the Ceph daemon type: "mon", "mgr", "osd", "mds", "rgw" Daemon ID is the ID portion of the Ceph daemon name: "a" for "mon.a"; "c" for "mds.c"

func PodVolumes 

func PodVolumes(dataPaths *config.DataPathMap, dataDirHostPath string, confGeneratedInPod bool) []v1.Volume

PodVolumes fills in the volumes parameter with the common list of Kubernetes volumes for use in Ceph pods. This function is only used for OSDs.

func RemoveFinalizer 

func RemoveFinalizer(client client.Client, obj runtime.Object) error

RemoveFinalizer removes a finalizer from an object

func RookVolumeMounts 

func RookVolumeMounts(dataPaths *config.DataPathMap, confGeneratedInPod bool) []v1.VolumeMount

RookVolumeMounts returns the common list of Kubernetes volume mounts for Rook containers. This function is only used by OSDs.

func StoredLogAndCrashVolume 

func StoredLogAndCrashVolume(hostLogDir, hostCrashDir string) []v1.Volume

StoredLogAndCrashVolume returns a pod volume sourced from the stored log and crashes files.

func StoredLogAndCrashVolumeMount 

func StoredLogAndCrashVolumeMount(varLogCephDir, varLibCephCrashDir string) []v1.VolumeMount

StoredLogAndCrashVolumeMount returns a pod volume sourced from the stored log and crashes files.

func UpdateStatus 

func UpdateStatus(client client.Client, obj runtime.Object) error

UpdateStatus updates an object with a given status

func ValidateCephVersionsBetweenLocalAndExternalClusters 

func ValidateCephVersionsBetweenLocalAndExternalClusters(context *clusterd.Context, namespace string, localVersion cephver.CephVersion) (cephver.CephVersion, error)

ValidateCephVersionsBetweenLocalAndExternalClusters makes sure an external cluster can be connected by checking the external ceph versions available and comparing it with the local image provided

func WatchControllerPredicate 

func WatchControllerPredicate() predicate.Funcs

WatchControllerPredicate is a special update filter for update events do not reconcile if the the status changes, this avoids a reconcile storm loop

returning 'true' means triggering a reconciliation returning 'false' means do NOT trigger a reconciliation

func WatchPredicateForNonCRDObject 

func WatchPredicateForNonCRDObject(owner runtime.Object, scheme *runtime.Scheme) predicate.Funcs

WatchPredicateForNonCRDObject is a special filter for create events It only applies to non-CRD objects, meaning, for instance a cephv1.CephBlockPool{} object will not have this filter Only for objects like &v1.Secret{} etc...

We return 'false' on a create event so we don't overstep with the main watcher on cephv1.CephBlockPool{} This avoids a double reconcile when the secret gets deleted.

Types

type OwnerMatcher 

type OwnerMatcher struct {
	// contains filtered or unexported fields
}

OwnerMatcher is a struct representing the controller owner reference to use for comparison with child objects

func NewOwnerReferenceMatcher 

func NewOwnerReferenceMatcher(owner runtime.Object, scheme *runtime.Scheme) *OwnerMatcher

NewOwnerReferenceMatcher initializes a new owner reference matcher

func (*OwnerMatcher) Match 

func (e *OwnerMatcher) Match(object runtime.Object) (bool, metav1.Object, error)

Match checks whether a given object matches the parent controller owner reference It is used in the predicate functions for non-CRD objects to ensure we only watch resources that have the parent Kind in its owner reference AND the same UID

So we won't reconcile other object is we have multiple CRs

For example, for CephObjectStore we will only watch "secrets" that have an owner reference referencing the 'CephObjectStore' Kind

Source Files

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