my-rook-config/pkg/operator/ceph/object/objectstore.go

/*
Copyright 2016 The Rook Authors. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package object

import (
	"encoding/json"
	"fmt"
	"strconv"
	"strings"

	"github.com/pkg/errors"
	cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
	"github.com/rook/rook/pkg/daemon/ceph/client"
	ceph "github.com/rook/rook/pkg/daemon/ceph/client"
)

const (
	rootPool = ".rgw.root"

	// AppName is the name Rook uses for the object store's application
	AppName = "rook-ceph-rgw"
)

var (
	metadataPools = []string{
		// .rgw.root (rootPool) is appended to this slice where needed
		"rgw.control",
		"rgw.meta",
		"rgw.log",
		"rgw.buckets.index",
		"rgw.buckets.non-ec",
	}
	dataPoolName = "rgw.buckets.data"
)

type idType struct {
	ID string `json:"id"`
}

type realmType struct {
	Realms []string `json:"realms"`
}

func deleteRealmAndPools(context *Context, spec cephv1.ObjectStoreSpec) error {
	stores, err := getObjectStores(context)
	if err != nil {
		return errors.Wrapf(err, "failed to detect object stores during deletion")
	}
	logger.Infof("Found stores %v when deleting store %s", stores, context.Name)

	err = deleteRealm(context)
	if err != nil {
		return errors.Wrapf(err, "failed to delete realm")
	}

	lastStore := false
	if len(stores) == 1 && stores[0] == context.Name {
		lastStore = true
	}

	if !spec.PreservePoolsOnDelete {
		err = deletePools(context, spec, lastStore)
		if err != nil {
			return errors.Wrapf(err, "failed to delete object store pools")
		}
	} else {
		logger.Infof("PreservePoolsOnDelete is set in object store %s. Pools not deleted", context.Name)
	}
	return nil
}

func reconcileRealm(context *Context, serviceIP string, port int32) error {
	zoneArg := fmt.Sprintf("--rgw-zone=%s", context.Name)
	endpointArg := fmt.Sprintf("--endpoints=%s:%d", serviceIP, port)
	updatePeriod := false

	// The first realm must be marked as the default
	defaultArg := ""
	stores, err := getObjectStores(context)
	if err != nil {
		return errors.Wrapf(err, "failed to get object stores")
	}
	if len(stores) == 0 {
		defaultArg = "--default"
	}

	// create the realm if it doesn't exist yet
	output, err := runAdminCommand(context, "realm", "get")
	if err != nil {
		updatePeriod = true
		output, err = runAdminCommand(context, "realm", "create", defaultArg)
		if err != nil {
			return errors.Wrapf(err, "failed to create rgw realm %s", context.Name)
		}
	}

	realmID, err := decodeID(output)
	if err != nil {
		return errors.Wrapf(err, "failed to parse realm id")
	}

	// create the zonegroup if it doesn't exist yet
	output, err = runAdminCommand(context, "zonegroup", "get")
	if err != nil {
		updatePeriod = true
		output, err = runAdminCommand(context, "zonegroup", "create", "--master", endpointArg, defaultArg)
		if err != nil {
			return errors.Wrapf(err, "failed to create rgw zonegroup for %s", context.Name)
		}
	}

	zoneGroupID, err := decodeID(output)
	if err != nil {
		return errors.Wrapf(err, "failed to parse zone group id")
	}

	// create the zone if it doesn't exist yet
	output, err = runAdminCommand(context, "zone", "get", zoneArg)
	if err != nil {
		updatePeriod = true
		output, err = runAdminCommand(context, "zone", "create", "--master", endpointArg, zoneArg, defaultArg)
		if err != nil {
			return errors.Wrapf(err, "failed to create rgw zonegroup for %s", context.Name)
		}
	}
	zoneID, err := decodeID(output)
	if err != nil {
		return errors.Wrapf(err, "failed to parse zone id")
	}

	if updatePeriod {
		// the period will help notify other zones of changes if there are multi-zones
		_, err := runAdminCommandNoRealm(context, "period", "update", "--commit")
		if err != nil {
			return errors.Wrapf(err, "failed to update period")
		}
	}

	logger.Infof("RGW: realm=%s, zonegroup=%s, zone=%s", realmID, zoneGroupID, zoneID)
	return nil
}

func deleteRealm(context *Context) error {
	//  <name>
	_, err := runAdminCommand(context, "realm", "delete", "--rgw-realm", context.Name)
	if err != nil {
		logger.Warningf("failed to delete rgw realm %q. %v", context.Name, err)
	}

	_, err = runAdminCommand(context, "zonegroup", "delete", "--rgw-zonegroup", context.Name)
	if err != nil {
		logger.Warningf("failed to delete rgw zonegroup %q. %v", context.Name, err)
	}

	_, err = runAdminCommand(context, "zone", "delete", "--rgw-zone", context.Name)
	if err != nil {
		logger.Warningf("failed to delete rgw zone %q. %v", context.Name, err)
	}

	return nil
}

func decodeID(data string) (string, error) {
	var id idType
	err := json.Unmarshal([]byte(data), &id)
	if err != nil {
		return "", errors.Wrapf(err, "Failed to unmarshal json")
	}

	return id.ID, err
}

func getObjectStores(context *Context) ([]string, error) {
	output, err := runAdminCommandNoRealm(context, "realm", "list")
	if err != nil {
		if strings.Index(err.Error(), "exit status 2") != 0 {
			return []string{}, nil
		}
		return nil, err
	}

	var r realmType
	err = json.Unmarshal([]byte(output), &r)
	if err != nil {
		return nil, errors.Wrapf(err, "Failed to unmarshal realms")
	}

	return r.Realms, nil
}

func deletePools(context *Context, spec cephv1.ObjectStoreSpec, lastStore bool) error {
	if emptyPool(spec.DataPool) && emptyPool(spec.MetadataPool) {
		logger.Info("skipping removal of pools since not specified in the object store")
		return nil
	}

	pools := append(metadataPools, dataPoolName)
	if lastStore {
		pools = append(pools, rootPool)
	}

	for _, pool := range pools {
		name := poolName(context.Name, pool)
		if err := ceph.DeletePool(context.Context, context.ClusterName, name); err != nil {
			logger.Warningf("failed to delete pool %q. %v", name, err)
		}
	}

	// Delete erasure code profile if any
	erasureCodes, err := ceph.ListErasureCodeProfiles(context.Context, context.ClusterName)
	if err != nil {
		return errors.Wrapf(err, "failed to list erasure code profiles for cluster %s", context.ClusterName)
	}
	// cleans up the EC profile for the data pool only. Metadata pools don't support EC (only replication is supported).
	ecProfileName := client.GetErasureCodeProfileForPool(context.Name)
	for i := range erasureCodes {
		if erasureCodes[i] == ecProfileName {
			if err := ceph.DeleteErasureCodeProfile(context.Context, context.ClusterName, ecProfileName); err != nil {
				return errors.Wrapf(err, "failed to delete erasure code profile %s for object store %s", ecProfileName, context.Name)
			}
			break
		}
	}

	return nil
}

func createPools(context *Context, spec cephv1.ObjectStoreSpec) error {
	if emptyPool(spec.DataPool) && emptyPool(spec.MetadataPool) {
		logger.Info("no pools specified for the object store, checking for their existence...")
		pools := append(metadataPools, dataPoolName)
		pools = append(pools, rootPool)
		var missingPools []string
		for _, pool := range pools {
			poolName := poolName(context.Name, pool)
			_, err := ceph.GetPoolDetails(context.Context, context.ClusterName, poolName)
			if err != nil {
				logger.Debugf("failed to find pool %q. %v", poolName, err)
				missingPools = append(missingPools, poolName)
			}
		}
		if len(missingPools) > 0 {
			return fmt.Errorf("object store pools are missing: %v", missingPools)
		}
	}

	if err := createSimilarPools(context, append(metadataPools, rootPool), spec.MetadataPool, ""); err != nil {
		return errors.Wrapf(err, "failed to create metadata pools")
	}

	ecProfileName := ""
	if spec.DataPool.IsErasureCoded() {
		ecProfileName = client.GetErasureCodeProfileForPool(context.Name)
		// create a new erasure code profile for the data pool
		if err := ceph.CreateErasureCodeProfile(context.Context, context.ClusterName, ecProfileName, spec.DataPool); err != nil {
			return errors.Wrapf(err, "failed to create erasure code profile for object store %s", context.Name)
		}
	}

	if err := createSimilarPools(context, []string{dataPoolName}, spec.DataPool, ecProfileName); err != nil {
		return errors.Wrapf(err, "failed to create data pool")
	}

	return nil
}

func createSimilarPools(context *Context, pools []string, poolSpec cephv1.PoolSpec, ecProfileName string) error {
	for _, pool := range pools {
		// create the pool if it doesn't exist yet
		name := poolName(context.Name, pool)
		if poolDetails, err := ceph.GetPoolDetails(context.Context, context.ClusterName, name); err != nil {
			// If the ceph config has an EC profile, an EC pool must be created. Otherwise, it's necessary
			// to create a replicated pool.
			var err error
			if poolSpec.IsErasureCoded() {
				// An EC pool backing an object store does not need to enable EC overwrites, so the pool is
				// created with that property disabled to avoid unnecessary performance impact.
				err = ceph.CreateECPoolForApp(context.Context, context.ClusterName, name, ecProfileName, poolSpec, AppName, false /* enableECOverwrite */)
			} else {
				err = ceph.CreateReplicatedPoolForApp(context.Context, context.ClusterName, name, poolSpec, AppName)
			}
			if err != nil {
				return errors.Wrapf(err, "failed to create pool %s for object store %s.", name, context.Name)
			}
		} else {
			// pools already exist
			if !poolSpec.IsErasureCoded() {
				// detect if the replication is different from the pool details
				if poolDetails.Size != poolSpec.Replicated.Size {
					logger.Infof("pool size is changed from %d to %d", poolDetails.Size, poolSpec.Replicated.Size)
					if err := ceph.SetPoolReplicatedSizeProperty(context.Context, context.ClusterName, poolDetails.Name, strconv.FormatUint(uint64(poolSpec.Replicated.Size), 10)); err != nil {
						return errors.Wrapf(err, "failed to set size property to replicated pool %q to %d", poolDetails.Name, poolSpec.Replicated.Size)
					}
				}
			}
		}
	}
	return nil
}

func poolName(storeName, poolName string) string {
	if strings.HasPrefix(poolName, ".") {
		return poolName
	}
	// the name of the pool is <instance>.<name>, except for the pool ".rgw.root" that spans object stores
	return fmt.Sprintf("%s.%s", storeName, poolName)
}