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aerospike.go
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aerospike.go
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package aerospike
import (
"context"
"crypto/sha256"
"fmt"
"strconv"
"strings"
"time"
aero "github.com/aerospike/aerospike-client-go/v5"
log "github.com/hashicorp/go-hclog"
"github.com/hashicorp/go-secure-stdlib/strutil"
"github.com/hashicorp/vault/sdk/physical"
)
const (
keyBin = "keyBin"
valueBin = "valueBin"
defaultNamespace = "test"
defaultHostname = "127.0.0.1"
defaultPort = 3000
keyNotFoundError = "Key not found"
)
// AerospikeBackend is a physical backend that stores data in Aerospike.
type AerospikeBackend struct {
client *aero.Client
namespace string
set string
logger log.Logger
}
// Verify AerospikeBackend satisfies the correct interface.
var _ physical.Backend = (*AerospikeBackend)(nil)
// NewAerospikeBackend constructs an AerospikeBackend backend.
func NewAerospikeBackend(conf map[string]string, logger log.Logger) (physical.Backend, error) {
namespace, ok := conf["namespace"]
if !ok {
namespace = defaultNamespace
}
set := conf["set"]
policy, err := buildClientPolicy(conf)
if err != nil {
return nil, err
}
client, err := buildAerospikeClient(conf, policy)
if err != nil {
return nil, err
}
return &AerospikeBackend{
client: client,
namespace: namespace,
set: set,
logger: logger,
}, nil
}
func buildAerospikeClient(conf map[string]string, policy *aero.ClientPolicy) (*aero.Client, error) {
hostListString, ok := conf["hostlist"]
if !ok || hostListString == "" {
hostname, ok := conf["hostname"]
if !ok || hostname == "" {
hostname = defaultHostname
}
portString, ok := conf["port"]
if !ok || portString == "" {
portString = strconv.Itoa(defaultPort)
}
port, err := strconv.Atoi(portString)
if err != nil {
return nil, err
}
return aero.NewClientWithPolicy(policy, hostname, port)
}
hostList, err := parseHostList(hostListString)
if err != nil {
return nil, err
}
return aero.NewClientWithPolicyAndHost(policy, hostList...)
}
func buildClientPolicy(conf map[string]string) (*aero.ClientPolicy, error) {
policy := aero.NewClientPolicy()
policy.User = conf["username"]
policy.Password = conf["password"]
authMode := aero.AuthModeInternal
if mode, ok := conf["auth_mode"]; ok {
switch strings.ToUpper(mode) {
case "EXTERNAL":
authMode = aero.AuthModeExternal
case "INTERNAL":
authMode = aero.AuthModeInternal
default:
return nil, fmt.Errorf("'auth_mode' must be one of {INTERNAL, EXTERNAL}")
}
}
policy.AuthMode = authMode
policy.ClusterName = conf["cluster_name"]
if timeoutString, ok := conf["timeout"]; ok {
timeout, err := strconv.Atoi(timeoutString)
if err != nil {
return nil, err
}
policy.Timeout = time.Duration(timeout) * time.Millisecond
}
if idleTimeoutString, ok := conf["idle_timeout"]; ok {
idleTimeout, err := strconv.Atoi(idleTimeoutString)
if err != nil {
return nil, err
}
policy.IdleTimeout = time.Duration(idleTimeout) * time.Millisecond
}
return policy, nil
}
func (a *AerospikeBackend) key(userKey string) (*aero.Key, error) {
return aero.NewKey(a.namespace, a.set, hash(userKey))
}
// Put is used to insert or update an entry.
func (a *AerospikeBackend) Put(_ context.Context, entry *physical.Entry) error {
aeroKey, err := a.key(entry.Key)
if err != nil {
return err
}
// replace the Aerospike record if exists
writePolicy := aero.NewWritePolicy(0, 0)
writePolicy.RecordExistsAction = aero.REPLACE
binMap := make(aero.BinMap, 2)
binMap[keyBin] = entry.Key
binMap[valueBin] = entry.Value
return a.client.Put(writePolicy, aeroKey, binMap)
}
// Get is used to fetch an entry.
func (a *AerospikeBackend) Get(_ context.Context, key string) (*physical.Entry, error) {
aeroKey, err := a.key(key)
if err != nil {
return nil, err
}
record, err := a.client.Get(nil, aeroKey)
if err != nil {
if strings.Contains(err.Error(), keyNotFoundError) {
return nil, nil
}
return nil, err
}
value, ok := record.Bins[valueBin]
if !ok {
return nil, fmt.Errorf("Value bin was not found in the record")
}
return &physical.Entry{
Key: key,
Value: value.([]byte),
}, nil
}
// Delete is used to permanently delete an entry.
func (a *AerospikeBackend) Delete(_ context.Context, key string) error {
aeroKey, err := a.key(key)
if err != nil {
return err
}
_, err = a.client.Delete(nil, aeroKey)
return err
}
// List is used to list all the keys under a given
// prefix, up to the next prefix.
func (a *AerospikeBackend) List(_ context.Context, prefix string) ([]string, error) {
recordSet, err := a.client.ScanAll(nil, a.namespace, a.set)
if err != nil {
return nil, err
}
var keyList []string
for res := range recordSet.Results() {
if res.Err != nil {
return nil, res.Err
}
recordKey := res.Record.Bins[keyBin].(string)
if strings.HasPrefix(recordKey, prefix) {
trimPrefix := strings.TrimPrefix(recordKey, prefix)
keys := strings.Split(trimPrefix, "/")
if len(keys) == 1 {
keyList = append(keyList, keys[0])
} else {
withSlash := keys[0] + "/"
if !strutil.StrListContains(keyList, withSlash) {
keyList = append(keyList, withSlash)
}
}
}
}
return keyList, nil
}
func parseHostList(list string) ([]*aero.Host, error) {
hosts := strings.Split(list, ",")
var hostList []*aero.Host
for _, host := range hosts {
if host == "" {
continue
}
split := strings.Split(host, ":")
switch len(split) {
case 1:
hostList = append(hostList, aero.NewHost(split[0], defaultPort))
case 2:
port, err := strconv.Atoi(split[1])
if err != nil {
return nil, err
}
hostList = append(hostList, aero.NewHost(split[0], port))
default:
return nil, fmt.Errorf("Invalid 'hostlist' configuration")
}
}
return hostList, nil
}
func hash(s string) string {
hash := sha256.Sum256([]byte(s))
return fmt.Sprintf("%x", hash[:])
}