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kubernetes_lock_manager.go
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kubernetes_lock_manager.go
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package storage
import (
"context"
"fmt"
"sync"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
"github.com/werf/lockgate/pkg/distributed_locker"
"github.com/werf/werf/pkg/kubeutils"
"github.com/werf/werf/pkg/werf/locker_with_retry"
"k8s.io/apimachinery/pkg/runtime/schema"
"github.com/werf/lockgate"
"github.com/werf/logboek"
"github.com/werf/werf/pkg/werf"
)
func NewKubernetesLockManager(namespace string, kubeClient kubernetes.Interface, kubeDynamicClient dynamic.Interface, getConfigMapNameFunc func(projectName string) string) *KubernetesLockManager {
return &KubernetesLockManager{
KubeClient: kubeClient,
KubeDynamicClient: kubeDynamicClient,
Namespace: namespace,
LockerPerProject: make(map[string]lockgate.Locker),
GetConfigMapNameFunc: getConfigMapNameFunc,
}
}
type KubernetesLockManager struct {
KubeClient kubernetes.Interface
KubeDynamicClient dynamic.Interface
Namespace string
LockerPerProject map[string]lockgate.Locker
GetConfigMapNameFunc func(projectName string) string
mux sync.Mutex
}
func (manager *KubernetesLockManager) getLockerForProject(ctx context.Context, projectName string) (lockgate.Locker, error) {
manager.mux.Lock()
defer manager.mux.Unlock()
if locker, hasKey := manager.LockerPerProject[projectName]; hasKey {
return locker, nil
}
name := manager.GetConfigMapNameFunc(projectName)
if _, err := kubeutils.GetOrCreateConfigMapWithNamespaceIfNotExists(manager.KubeClient, manager.Namespace, name); err != nil {
return nil, err
}
locker := distributed_locker.NewKubernetesLocker(
manager.KubeDynamicClient, schema.GroupVersionResource{
Group: "",
Version: "v1",
Resource: "configmaps",
}, name, manager.Namespace,
)
lockerWithRetry := locker_with_retry.NewLockerWithRetry(ctx, locker, locker_with_retry.LockerWithRetryOptions{MaxAcquireAttempts: 10, MaxReleaseAttempts: 10})
manager.LockerPerProject[projectName] = lockerWithRetry
return locker, nil
}
func (manager *KubernetesLockManager) LockStage(ctx context.Context, projectName, digest string) (LockHandle, error) {
if locker, err := manager.getLockerForProject(ctx, projectName); err != nil {
return LockHandle{}, err
} else {
_, lock, err := locker.Acquire(kubernetesStageLockName(projectName, digest), werf.SetupLockerDefaultOptions(ctx, lockgate.AcquireOptions{}))
return LockHandle{LockgateHandle: lock, ProjectName: projectName}, err
}
}
func (manager *KubernetesLockManager) LockStageCache(ctx context.Context, projectName, digest string) (LockHandle, error) {
if locker, err := manager.getLockerForProject(ctx, projectName); err != nil {
return LockHandle{}, err
} else {
_, lock, err := locker.Acquire(kubernetesStageCacheLockName(projectName, digest), werf.SetupLockerDefaultOptions(ctx, lockgate.AcquireOptions{}))
return LockHandle{LockgateHandle: lock, ProjectName: projectName}, err
}
}
func (manager *KubernetesLockManager) Unlock(ctx context.Context, lock LockHandle) error {
if locker, err := manager.getLockerForProject(ctx, lock.ProjectName); err != nil {
return err
} else {
err := locker.Release(lock.LockgateHandle)
if err != nil {
logboek.Context(ctx).Error().LogF("ERROR: unable to release lock for %q: %s\n", lock.LockgateHandle.LockName, err)
}
return err
}
}
func kubernetesStageLockName(projectName, digest string) string {
return fmt.Sprintf("%s/stage/%s", projectName, digest)
}
func kubernetesStageCacheLockName(projectName, digest string) string {
return fmt.Sprintf("%s/stage-cache/%s", projectName, digest)
}