mirror of
https://github.com/minio/minio.git
synced 2025-11-08 21:24:55 -05:00
simplify webhook DNS further generalize for gateway (#10448)
continuation of the changes from eaaf05a7cc
this further simplifies, enables this for gateway deployments as well
This commit is contained in:
Harshavardhana
GitHub
298
cmd/config/dns/etcd_dns.go
Normal file
298
cmd/config/dns/etcd_dns.go
Normal file
@@ -0,0 +1,298 @@
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/*
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* MinIO Cloud Storage, (C) 2018,2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dns
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net"
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"sort"
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"strings"
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"time"
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"github.com/coredns/coredns/plugin/etcd/msg"
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"github.com/minio/minio-go/v7/pkg/set"
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"go.etcd.io/etcd/v3/clientv3"
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)
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// ErrNoEntriesFound - Indicates no entries were found for the given key (directory)
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var ErrNoEntriesFound = errors.New("No entries found for this key")
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const etcdPathSeparator = "/"
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// create a new coredns service record for the bucket.
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func newCoreDNSMsg(ip string, port string, ttl uint32, t time.Time) ([]byte, error) {
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return json.Marshal(&SrvRecord{
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Host: ip,
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Port: json.Number(port),
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TTL: ttl,
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CreationDate: t,
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})
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}
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// Close closes the internal etcd client and cannot be used further
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func (c *CoreDNS) Close() error {
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c.etcdClient.Close()
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return nil
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}
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// List - Retrieves list of DNS entries for the domain.
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func (c *CoreDNS) List() (map[string][]SrvRecord, error) {
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var srvRecords = map[string][]SrvRecord{}
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for _, domainName := range c.domainNames {
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key := msg.Path(fmt.Sprintf("%s.", domainName), c.prefixPath)
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records, err := c.list(key)
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if err != nil {
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return nil, err
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}
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for _, record := range records {
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if record.Key == "" {
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continue
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}
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srvRecords[record.Key] = append(srvRecords[record.Key], record)
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}
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}
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return srvRecords, nil
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}
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// Get - Retrieves DNS records for a bucket.
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func (c *CoreDNS) Get(bucket string) ([]SrvRecord, error) {
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var srvRecords []SrvRecord
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for _, domainName := range c.domainNames {
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key := msg.Path(fmt.Sprintf("%s.%s.", bucket, domainName), c.prefixPath)
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records, err := c.list(key)
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if err != nil {
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return nil, err
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}
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// Make sure we have record.Key is empty
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// this can only happen when record.Key
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// has bucket entry with exact prefix
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// match any record.Key which do not
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// match the prefixes we skip them.
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for _, record := range records {
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if record.Key != "" {
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continue
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}
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srvRecords = append(srvRecords, record)
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}
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}
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if len(srvRecords) == 0 {
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return nil, ErrNoEntriesFound
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}
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return srvRecords, nil
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}
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// msgUnPath converts a etcd path to domainname.
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func msgUnPath(s string) string {
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ks := strings.Split(strings.Trim(s, etcdPathSeparator), etcdPathSeparator)
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for i, j := 0, len(ks)-1; i < j; i, j = i+1, j-1 {
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ks[i], ks[j] = ks[j], ks[i]
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}
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return strings.Join(ks, ".")
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}
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// Retrieves list of entries under the key passed.
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// Note that this method fetches entries upto only two levels deep.
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func (c *CoreDNS) list(key string) ([]SrvRecord, error) {
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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r, err := c.etcdClient.Get(ctx, key, clientv3.WithPrefix())
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defer cancel()
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if err != nil {
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return nil, err
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}
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if r.Count == 0 {
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key = strings.TrimSuffix(key, etcdPathSeparator)
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r, err = c.etcdClient.Get(ctx, key)
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if err != nil {
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return nil, err
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}
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}
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var srvRecords []SrvRecord
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for _, n := range r.Kvs {
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var srvRecord SrvRecord
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if err = json.Unmarshal([]byte(n.Value), &srvRecord); err != nil {
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return nil, err
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}
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srvRecord.Key = strings.TrimPrefix(string(n.Key), key)
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srvRecord.Key = strings.TrimSuffix(srvRecord.Key, srvRecord.Host)
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// Skip non-bucket entry like for a key
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// /skydns/net/miniocloud/10.0.0.1 that may exist as
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// dns entry for the server (rather than the bucket
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// itself).
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if srvRecord.Key == "" {
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continue
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}
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srvRecord.Key = msgUnPath(srvRecord.Key)
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srvRecords = append(srvRecords, srvRecord)
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}
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sort.Slice(srvRecords, func(i int, j int) bool {
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return srvRecords[i].Key < srvRecords[j].Key
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})
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return srvRecords, nil
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}
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// Put - Adds DNS entries into etcd endpoint in CoreDNS etcd message format.
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func (c *CoreDNS) Put(bucket string) error {
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c.Delete(bucket) // delete any existing entries.
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t := time.Now().UTC()
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for ip := range c.domainIPs {
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bucketMsg, err := newCoreDNSMsg(ip, c.domainPort, defaultTTL, t)
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if err != nil {
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return err
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}
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for _, domainName := range c.domainNames {
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key := msg.Path(fmt.Sprintf("%s.%s", bucket, domainName), c.prefixPath)
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key = key + etcdPathSeparator + ip
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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_, err = c.etcdClient.Put(ctx, key, string(bucketMsg))
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defer cancel()
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if err != nil {
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ctx, cancel = context.WithTimeout(context.Background(), defaultContextTimeout)
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c.etcdClient.Delete(ctx, key)
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defer cancel()
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return err
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}
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}
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}
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return nil
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}
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// Delete - Removes DNS entries added in Put().
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func (c *CoreDNS) Delete(bucket string) error {
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for _, domainName := range c.domainNames {
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key := msg.Path(fmt.Sprintf("%s.%s.", bucket, domainName), c.prefixPath)
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srvRecords, err := c.list(key)
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if err != nil {
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return err
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}
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for _, record := range srvRecords {
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dctx, dcancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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if _, err = c.etcdClient.Delete(dctx, key+etcdPathSeparator+record.Host); err != nil {
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dcancel()
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return err
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}
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dcancel()
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}
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}
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return nil
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}
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// DeleteRecord - Removes a specific DNS entry
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func (c *CoreDNS) DeleteRecord(record SrvRecord) error {
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for _, domainName := range c.domainNames {
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key := msg.Path(fmt.Sprintf("%s.%s.", record.Key, domainName), c.prefixPath)
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dctx, dcancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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if _, err := c.etcdClient.Delete(dctx, key+etcdPathSeparator+record.Host); err != nil {
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dcancel()
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return err
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}
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dcancel()
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}
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return nil
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}
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// String stringer name for this implementation of dns.Store
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func (c *CoreDNS) String() string {
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return "etcdDNS"
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}
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// CoreDNS - represents dns config for coredns server.
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type CoreDNS struct {
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domainNames []string
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domainIPs set.StringSet
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domainPort string
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prefixPath string
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etcdClient *clientv3.Client
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}
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// EtcdOption - functional options pattern style
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type EtcdOption func(*CoreDNS)
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// DomainNames set a list of domain names used by this CoreDNS
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// client setting, note this will fail if set to empty when
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// constructor initializes.
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func DomainNames(domainNames []string) EtcdOption {
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return func(args *CoreDNS) {
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args.domainNames = domainNames
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}
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}
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// DomainIPs set a list of custom domain IPs, note this will
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// fail if set to empty when constructor initializes.
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func DomainIPs(domainIPs set.StringSet) EtcdOption {
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return func(args *CoreDNS) {
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args.domainIPs = domainIPs
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}
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}
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// DomainPort - is a string version of server port
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func DomainPort(domainPort string) EtcdOption {
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return func(args *CoreDNS) {
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args.domainPort = domainPort
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}
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}
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// CoreDNSPath - custom prefix on etcd to populate DNS
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// service records, optional and can be empty.
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// if empty then c.prefixPath is used i.e "/skydns"
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func CoreDNSPath(prefix string) EtcdOption {
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return func(args *CoreDNS) {
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args.prefixPath = prefix
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}
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}
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// NewCoreDNS - initialize a new coreDNS set/unset values.
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func NewCoreDNS(cfg clientv3.Config, setters ...EtcdOption) (Store, error) {
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etcdClient, err := clientv3.New(cfg)
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if err != nil {
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return nil, err
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}
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args := &CoreDNS{
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etcdClient: etcdClient,
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}
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for _, setter := range setters {
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setter(args)
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}
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if len(args.domainNames) == 0 || args.domainIPs.IsEmpty() {
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return nil, errors.New("invalid argument")
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}
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// strip ports off of domainIPs
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domainIPsWithoutPorts := args.domainIPs.ApplyFunc(func(ip string) string {
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host, _, err := net.SplitHostPort(ip)
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if err != nil {
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if strings.Contains(err.Error(), "missing port in address") {
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host = ip
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}
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}
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return host
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})
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args.domainIPs = domainIPsWithoutPorts
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return args, nil
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}
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221
cmd/config/dns/operator_dns.go
Normal file
221
cmd/config/dns/operator_dns.go
Normal file
@@ -0,0 +1,221 @@
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/*
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* MinIO Cloud Storage, (C) 2020 MinIO, Inc.
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*
|
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* Licensed under the Apache License, Version 2.0 (the "License");
|
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* 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.
|
||||
*/
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package dns
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"errors"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"strconv"
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"time"
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"github.com/dgrijalva/jwt-go"
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"github.com/minio/minio/cmd/config"
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xhttp "github.com/minio/minio/cmd/http"
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)
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var (
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defaultOperatorContextTimeout = 10 * time.Second
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// ErrNotImplemented - Indicates the functionality which is not implemented
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ErrNotImplemented = errors.New("The method is not implemented")
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)
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func (c *OperatorDNS) addAuthHeader(r *http.Request) error {
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if c.username == "" || c.password == "" {
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return nil
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}
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claims := &jwt.StandardClaims{
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ExpiresAt: int64(15 * time.Minute),
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Issuer: c.username,
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Subject: config.EnvDNSWebhook,
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS512, claims)
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ss, err := token.SignedString([]byte(c.password))
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if err != nil {
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return err
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}
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r.Header.Set("Authorization", "Bearer "+ss)
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return nil
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}
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func (c *OperatorDNS) endpoint(bucket string, delete bool) (string, error) {
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u, err := url.Parse(c.Endpoint)
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if err != nil {
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return "", err
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}
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q := u.Query()
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q.Add("bucket", bucket)
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q.Add("delete", strconv.FormatBool(delete))
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u.RawQuery = q.Encode()
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return u.String(), nil
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}
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// Put - Adds DNS entries into operator webhook server
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func (c *OperatorDNS) Put(bucket string) error {
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ctx, cancel := context.WithTimeout(context.Background(), defaultOperatorContextTimeout)
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defer cancel()
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e, err := c.endpoint(bucket, false)
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if err != nil {
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return err
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, e, nil)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if err = c.addAuthHeader(req); err != nil {
|
||||
return err
|
||||
}
|
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resp, err := c.httpClient.Do(req)
|
||||
if err != nil {
|
||||
if derr := c.Delete(bucket); derr != nil {
|
||||
return derr
|
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}
|
||||
}
|
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xhttp.DrainBody(resp.Body)
|
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if resp.StatusCode != http.StatusOK {
|
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return fmt.Errorf("request to create the service for bucket %s, failed with status %s", bucket, resp.Status)
|
||||
}
|
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return nil
|
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}
|
||||
|
||||
// Delete - Removes DNS entries added in Put().
|
||||
func (c *OperatorDNS) Delete(bucket string) error {
|
||||
ctx, cancel := context.WithTimeout(context.Background(), defaultOperatorContextTimeout)
|
||||
defer cancel()
|
||||
e, err := c.endpoint(bucket, true)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
req, err := http.NewRequestWithContext(ctx, http.MethodPost, e, nil)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if err = c.addAuthHeader(req); err != nil {
|
||||
return err
|
||||
}
|
||||
resp, err := c.httpClient.Do(req)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
xhttp.DrainBody(resp.Body)
|
||||
if resp.StatusCode != http.StatusOK {
|
||||
return fmt.Errorf("request to delete the service for bucket %s, failed with status %s", bucket, resp.Status)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// DeleteRecord - Removes a specific DNS entry
|
||||
// No Op for Operator because operator deals on with bucket entries
|
||||
func (c *OperatorDNS) DeleteRecord(record SrvRecord) error {
|
||||
return ErrNotImplemented
|
||||
}
|
||||
|
||||
// Close closes the internal http client
|
||||
func (c *OperatorDNS) Close() error {
|
||||
c.httpClient.CloseIdleConnections()
|
||||
return nil
|
||||
}
|
||||
|
||||
// List - Retrieves list of DNS entries for the domain.
|
||||
// This is a No Op for Operator because, there is no intent to enforce global
|
||||
// namespace at MinIO level with this DNS entry. The global namespace in
|
||||
// enforced by the Kubernetes Operator
|
||||
func (c *OperatorDNS) List() (srvRecords map[string][]SrvRecord, err error) {
|
||||
return nil, ErrNotImplemented
|
||||
}
|
||||
|
||||
// Get - Retrieves DNS records for a bucket.
|
||||
// This is a No Op for Operator because, there is no intent to enforce global
|
||||
// namespace at MinIO level with this DNS entry. The global namespace in
|
||||
// enforced by the Kubernetes Operator
|
||||
func (c *OperatorDNS) Get(bucket string) (srvRecords []SrvRecord, err error) {
|
||||
return nil, ErrNotImplemented
|
||||
}
|
||||
|
||||
// String stringer name for this implementation of dns.Store
|
||||
func (c *OperatorDNS) String() string {
|
||||
return "webhookDNS"
|
||||
}
|
||||
|
||||
// OperatorDNS - represents dns config for MinIO k8s operator.
|
||||
type OperatorDNS struct {
|
||||
httpClient *http.Client
|
||||
Endpoint string
|
||||
rootCAs *x509.CertPool
|
||||
username string
|
||||
password string
|
||||
}
|
||||
|
||||
// OperatorOption - functional options pattern style for OperatorDNS
|
||||
type OperatorOption func(*OperatorDNS)
|
||||
|
||||
// Authentication - custom username and password for authenticating at the endpoint
|
||||
func Authentication(username, password string) OperatorOption {
|
||||
return func(args *OperatorDNS) {
|
||||
args.username = username
|
||||
args.password = password
|
||||
}
|
||||
}
|
||||
|
||||
// RootCAs - add custom trust certs pool
|
||||
func RootCAs(CAs *x509.CertPool) OperatorOption {
|
||||
return func(args *OperatorDNS) {
|
||||
args.rootCAs = CAs
|
||||
}
|
||||
}
|
||||
|
||||
// NewOperatorDNS - initialize a new K8S Operator DNS set/unset values.
|
||||
func NewOperatorDNS(endpoint string, setters ...OperatorOption) (Store, error) {
|
||||
if endpoint == "" {
|
||||
return nil, errors.New("invalid argument")
|
||||
}
|
||||
|
||||
args := &OperatorDNS{
|
||||
Endpoint: endpoint,
|
||||
}
|
||||
for _, setter := range setters {
|
||||
setter(args)
|
||||
}
|
||||
args.httpClient = &http.Client{
|
||||
Transport: &http.Transport{
|
||||
Proxy: http.ProxyFromEnvironment,
|
||||
DialContext: (&net.Dialer{
|
||||
Timeout: 3 * time.Second,
|
||||
KeepAlive: 5 * time.Second,
|
||||
}).DialContext,
|
||||
ResponseHeaderTimeout: 3 * time.Second,
|
||||
TLSHandshakeTimeout: 3 * time.Second,
|
||||
ExpectContinueTimeout: 3 * time.Second,
|
||||
TLSClientConfig: &tls.Config{
|
||||
RootCAs: args.rootCAs,
|
||||
},
|
||||
// Go net/http automatically unzip if content-type is
|
||||
// gzip disable this feature, as we are always interested
|
||||
// in raw stream.
|
||||
DisableCompression: true,
|
||||
},
|
||||
}
|
||||
return args, nil
|
||||
}
|
||||
28
cmd/config/dns/store.go
Normal file
28
cmd/config/dns/store.go
Normal file
@@ -0,0 +1,28 @@
|
||||
/*
|
||||
* MinIO Cloud Storage, (C) 2020 MinIO, Inc.
|
||||
*
|
||||
* 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 dns
|
||||
|
||||
// Store dns record store
|
||||
type Store interface {
|
||||
Put(bucket string) error
|
||||
Get(bucket string) ([]SrvRecord, error)
|
||||
Delete(bucket string) error
|
||||
List() (map[string][]SrvRecord, error)
|
||||
DeleteRecord(record SrvRecord) error
|
||||
Close() error
|
||||
String() string
|
||||
}
|
||||
56
cmd/config/dns/types.go
Normal file
56
cmd/config/dns/types.go
Normal file
@@ -0,0 +1,56 @@
|
||||
/*
|
||||
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
|
||||
*
|
||||
* 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 dns
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"time"
|
||||
)
|
||||
|
||||
const (
|
||||
defaultTTL = 30
|
||||
defaultContextTimeout = 5 * time.Minute
|
||||
)
|
||||
|
||||
// SrvRecord - represents a DNS service record
|
||||
type SrvRecord struct {
|
||||
Host string `json:"host,omitempty"`
|
||||
Port json.Number `json:"port,omitempty"`
|
||||
Priority int `json:"priority,omitempty"`
|
||||
Weight int `json:"weight,omitempty"`
|
||||
Text string `json:"text,omitempty"`
|
||||
Mail bool `json:"mail,omitempty"` // Be an MX record. Priority becomes Preference.
|
||||
TTL uint32 `json:"ttl,omitempty"`
|
||||
|
||||
// Holds info about when the entry was created first.
|
||||
CreationDate time.Time `json:"creationDate"`
|
||||
|
||||
// When a SRV record with a "Host: IP-address" is added, we synthesize
|
||||
// a srv.Target domain name. Normally we convert the full Key where
|
||||
// the record lives to a DNS name and use this as the srv.Target. When
|
||||
// TargetStrip > 0 we strip the left most TargetStrip labels from the
|
||||
// DNS name.
|
||||
TargetStrip int `json:"targetstrip,omitempty"`
|
||||
|
||||
// Group is used to group (or *not* to group) different services
|
||||
// together. Services with an identical Group are returned in
|
||||
// the same answer.
|
||||
Group string `json:"group,omitempty"`
|
||||
|
||||
// Key carries the original key used during Put().
|
||||
Key string `json:"-"`
|
||||
}
|
||||
Reference in New Issue
Block a user