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add redis sentinel patch

Browse Source 
Signed-off-by: wang yan <wangyan@vmware.com>
This commit is contained in:
wang yan 2025-02-21 15:48:07 +08:00
parent 5d5c60f77c
commit c747ef149b
9 changed files with 779 additions and 18 deletions
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2
.github/workflows/build.yml vendored
View File

@ -9,7 +9,7 @@ on:
pull_request:
env:
DOCKERHUB_SLUG: distribution/distribution
DOCKERHUB_SLUG: goharbor/distribution
jobs:
build:

7
.github/workflows/ci.yml vendored
View File

@ -5,7 +5,6 @@ on:
pull_request:
jobs:
build:
runs-on: ubuntu-latest
env:
@ -19,7 +18,7 @@ jobs:
steps:
- uses: actions/checkout@v2
with:
path: src/github.com/docker/distribution
path: src/github.com/goharbor/distribution
fetch-depth: 50
- name: Set up Go
@ -34,7 +33,7 @@ jobs:
cd /tmp && go install github.com/vbatts/git-validation@latest
- name: Build
working-directory: ./src/github.com/docker/distribution
working-directory: ./src/github.com/goharbor/distribution
run: |
DCO_VERBOSITY=-q script/validate/dco
GO111MODULE=on script/setup/install-dev-tools
@ -47,4 +46,4 @@ jobs:
- uses: codecov/codecov-action@v1
with:
directory: ./src/github.com/docker/distribution
directory: ./src/github.com/goharbor/distribution

3
configuration/configuration.go
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@ -168,6 +168,9 @@ type Configuration struct {
// Addr specifies the the redis instance available to the application.
Addr string `yaml:"addr,omitempty"`
// SentinelMasterSet specifies the the redis sentinel master set name.
SentinelMasterSet string `yaml:"sentinelMasterSet,omitempty"`
// Password string to use when making a connection.
Password string `yaml:"password,omitempty"`

55
registry/handlers/app.go
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@ -3,6 +3,7 @@ package handlers
import (
"context"
"crypto/rand"
"errors"
"expvar"
"fmt"
"math"
@ -16,6 +17,7 @@ import (
"strings"
"time"
"github.com/FZambia/sentinel"
"github.com/distribution/reference"
"github.com/docker/distribution"
"github.com/docker/distribution/configuration"
@ -499,6 +501,45 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
return
}
var getRedisAddr func() (string, error)
var testOnBorrow func(c redis.Conn, t time.Time) error
if configuration.Redis.SentinelMasterSet != "" {
sntnl := &sentinel.Sentinel{
Addrs: strings.Split(configuration.Redis.Addr, ","),
MasterName: configuration.Redis.SentinelMasterSet,
Dial: func(addr string) (redis.Conn, error) {
c, err := redis.DialTimeout("tcp", addr,
configuration.Redis.DialTimeout,
configuration.Redis.ReadTimeout,
configuration.Redis.WriteTimeout)
if err != nil {
return nil, err
}
return c, nil
},
}
getRedisAddr = func() (string, error) {
return sntnl.MasterAddr()
}
testOnBorrow = func(c redis.Conn, t time.Time) error {
if !sentinel.TestRole(c, "master") {
return errors.New("role check failed")
}
return nil
}
} else {
getRedisAddr = func() (string, error) {
return configuration.Redis.Addr, nil
}
testOnBorrow = func(c redis.Conn, t time.Time) error {
// TODO(stevvooe): We can probably do something more interesting
// here with the health package.
_, err := c.Do("PING")
return err
}
}
pool := &redis.Pool{
Dial: func() (redis.Conn, error) {
// TODO(stevvooe): Yet another use case for contextual timing.
@ -514,8 +555,11 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
}
}
conn, err := redis.DialTimeout("tcp",
configuration.Redis.Addr,
redisAddr, err := getRedisAddr()
if err != nil {
return nil, err
}
conn, err := redis.DialTimeout("tcp", redisAddr,
configuration.Redis.DialTimeout,
configuration.Redis.ReadTimeout,
configuration.Redis.WriteTimeout)
@ -550,12 +594,7 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
MaxIdle: configuration.Redis.Pool.MaxIdle,
MaxActive: configuration.Redis.Pool.MaxActive,
IdleTimeout: configuration.Redis.Pool.IdleTimeout,
TestOnBorrow: func(c redis.Conn, t time.Time) error {
// TODO(stevvooe): We can probably do something more interesting
// here with the health package.
_, err := c.Do("PING")
return err
},
TestOnBorrow: testOnBorrow,
Wait: false, // if a connection is not available, proceed without cache.
}

55
registry/handlers/app_test.go
View File

@ -140,7 +140,7 @@ func TestAppDispatcher(t *testing.T) {
// TestNewApp covers the creation of an application via NewApp with a
// configuration.
func TestNewApp(t *testing.T) {
ctx := context.Background()
config := configuration.Configuration{
Storage: configuration.Storage{
"testdriver": nil,
@ -157,7 +157,60 @@ func TestNewApp(t *testing.T) {
},
},
}
runAppWithConfig(t, config)
}
// TestNewApp covers the creation of an application via NewApp with a
// configuration(with redis).
func TestNewAppWithRedis(t *testing.T) {
config := configuration.Configuration{
Storage: configuration.Storage{
"testdriver": nil,
"maintenance": configuration.Parameters{"uploadpurging": map[interface{}]interface{}{
"enabled": false,
}},
},
Auth: configuration.Auth{
// For now, we simply test that new auth results in a viable
// application.
"silly": {
"realm": "realm-test",
"service": "service-test",
},
},
}
config.Redis.Addr = "127.0.0.1:6379"
config.Redis.DB = 0
runAppWithConfig(t, config)
}
// TestNewApp covers the creation of an application via NewApp with a
// configuration(with redis sentinel cluster).
func TestNewAppWithRedisSentinelCluster(t *testing.T) {
config := configuration.Configuration{
Storage: configuration.Storage{
"testdriver": nil,
"maintenance": configuration.Parameters{"uploadpurging": map[interface{}]interface{}{
"enabled": false,
}},
},
Auth: configuration.Auth{
// For now, we simply test that new auth results in a viable
// application.
"silly": {
"realm": "realm-test",
"service": "service-test",
},
},
}
config.Redis.Addr = "192.168.0.11:26379,192.168.0.12:26379"
config.Redis.DB = 0
config.Redis.SentinelMasterSet = "mymaster"
runAppWithConfig(t, config)
}
func runAppWithConfig(t *testing.T, config configuration.Configuration) {
ctx := context.Background()
// Mostly, with this test, given a sane configuration, we are simply
// ensuring that NewApp doesn't panic. We might want to tweak this
// behavior.

1
vendor.conf
View File

@ -51,3 +51,4 @@ gopkg.in/yaml.v2 v2.2.1
rsc.io/letsencrypt e770c10b0f1a64775ae91d240407ce00d1a5bdeb https://github.com/dmcgowan/letsencrypt.git
github.com/opencontainers/go-digest ea51bea511f75cfa3ef6098cc253c5c3609b037a # v1.0.0
github.com/opencontainers/image-spec 67d2d5658fe0476ab9bf414cec164077ebff3920 # v1.0.2
github.com/FZambia/sentinel 5585739eb4b6478aa30161866ccf9ce0ef5847c7 https://github.com/jeremyxu2010/sentinel.git

201
vendor/github.com/FZambia/sentinel/LICENSE generated vendored Normal file
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@ -0,0 +1,201 @@
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39
vendor/github.com/FZambia/sentinel/README.md generated vendored Normal file
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@ -0,0 +1,39 @@
go-sentinel
===========
Redis Sentinel support for [redigo](https://github.com/gomodule/redigo) library.
Documentation
-------------
- [API Reference](http://godoc.org/github.com/FZambia/sentinel)
Alternative solution
--------------------
You can alternatively configure Haproxy between your application and Redis to proxy requests to Redis master instance if you only need HA:
```
listen redis
server redis-01 127.0.0.1:6380 check port 6380 check inter 2s weight 1 inter 2s downinter 5s rise 10 fall 2
server redis-02 127.0.0.1:6381 check port 6381 check inter 2s weight 1 inter 2s downinter 5s rise 10 fall 2 backup
bind *:6379
mode tcp
option tcpka
option tcplog
option tcp-check
tcp-check send PING\r\n
tcp-check expect string +PONG
tcp-check send info\ replication\r\n
tcp-check expect string role:master
tcp-check send QUIT\r\n
tcp-check expect string +OK
balance roundrobin
```
This way you don't need to use this library.
License
-------
Library is available under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html).

426
vendor/github.com/FZambia/sentinel/sentinel.go generated vendored Normal file
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@ -0,0 +1,426 @@
package sentinel
import (
"errors"
"fmt"
"net"
"strings"
"sync"
"time"
"github.com/garyburd/redigo/redis"
)
// Sentinel provides a way to add high availability (HA) to Redis Pool using
// preconfigured addresses of Sentinel servers and name of master which Sentinels
// monitor. It works with Redis >= 2.8.12 (mostly because of ROLE command that
// was introduced in that version, it's possible though to support old versions
// using INFO command).
//
// Example of the simplest usage to contact master "mymaster":
//
// func newSentinelPool() *redis.Pool {
// sntnl := &sentinel.Sentinel{
// Addrs: []string{":26379", ":26380", ":26381"},
// MasterName: "mymaster",
// Dial: func(addr string) (redis.Conn, error) {
// timeout := 500 * time.Millisecond
// c, err := redis.DialTimeout("tcp", addr, timeout, timeout, timeout)
// if err != nil {
// return nil, err
// }
// return c, nil
// },
// }
// return &redis.Pool{
// MaxIdle: 3,
// MaxActive: 64,
// Wait: true,
// IdleTimeout: 240 * time.Second,
// Dial: func() (redis.Conn, error) {
// masterAddr, err := sntnl.MasterAddr()
// if err != nil {
// return nil, err
// }
// c, err := redis.Dial("tcp", masterAddr)
// if err != nil {
// return nil, err
// }
// return c, nil
// },
// TestOnBorrow: func(c redis.Conn, t time.Time) error {
// if !sentinel.TestRole(c, "master") {
// return errors.New("Role check failed")
// } else {
// return nil
// }
// },
// }
// }
type Sentinel struct {
// Addrs is a slice with known Sentinel addresses.
Addrs []string
// MasterName is a name of Redis master Sentinel servers monitor.
MasterName string
// Dial is a user supplied function to connect to Sentinel on given address. This
// address will be chosen from Addrs slice.
// Note that as per the redis-sentinel client guidelines, a timeout is mandatory
// while connecting to Sentinels, and should not be set to 0.
Dial func(addr string) (redis.Conn, error)
// Pool is a user supplied function returning custom connection pool to Sentinel.
// This can be useful to tune options if you are not satisfied with what default
// Sentinel pool offers. See defaultPool() method for default pool implementation.
// In most cases you only need to provide Dial function and let this be nil.
Pool func(addr string) *redis.Pool
mu sync.RWMutex
pools map[string]*redis.Pool
addr string
}
// NoSentinelsAvailable is returned when all sentinels in the list are exhausted
// (or none configured), and contains the last error returned by Dial (which
// may be nil)
type NoSentinelsAvailable struct {
lastError error
}
func (ns NoSentinelsAvailable) Error() string {
if ns.lastError != nil {
return fmt.Sprintf("redigo: no sentinels available; last error: %s", ns.lastError.Error())
}
return fmt.Sprintf("redigo: no sentinels available")
}
// putToTop puts Sentinel address to the top of address list - this means
// that all next requests will use Sentinel on this address first.
//
// From Sentinel guidelines:
//
// The first Sentinel replying to the client request should be put at the
// start of the list, so that at the next reconnection, we'll try first
// the Sentinel that was reachable in the previous connection attempt,
// minimizing latency.
//
// Lock must be held by caller.
func (s *Sentinel) putToTop(addr string) {
addrs := s.Addrs
if addrs[0] == addr {
// Already on top.
return
}
newAddrs := []string{addr}
for _, a := range addrs {
if a == addr {
continue
}
newAddrs = append(newAddrs, a)
}
s.Addrs = newAddrs
}
// putToBottom puts Sentinel address to the bottom of address list.
// We call this method internally when see that some Sentinel failed to answer
// on application request so next time we start with another one.
//
// Lock must be held by caller.
func (s *Sentinel) putToBottom(addr string) {
addrs := s.Addrs
if addrs[len(addrs)-1] == addr {
// Already on bottom.
return
}
newAddrs := []string{}
for _, a := range addrs {
if a == addr {
continue
}
newAddrs = append(newAddrs, a)
}
newAddrs = append(newAddrs, addr)
s.Addrs = newAddrs
}
// defaultPool returns a connection pool to one Sentinel. This allows
// us to call concurrent requests to Sentinel using connection Do method.
func (s *Sentinel) defaultPool(addr string) *redis.Pool {
return &redis.Pool{
MaxIdle: 3,
MaxActive: 10,
Wait: true,
IdleTimeout: 240 * time.Second,
Dial: func() (redis.Conn, error) {
return s.Dial(addr)
},
TestOnBorrow: func(c redis.Conn, t time.Time) error {
_, err := c.Do("PING")
return err
},
}
}
func (s *Sentinel) get(addr string) redis.Conn {
pool := s.poolForAddr(addr)
return pool.Get()
}
func (s *Sentinel) poolForAddr(addr string) *redis.Pool {
s.mu.Lock()
if s.pools == nil {
s.pools = make(map[string]*redis.Pool)
}
pool, ok := s.pools[addr]
if ok {
s.mu.Unlock()
return pool
}
s.mu.Unlock()
newPool := s.newPool(addr)
s.mu.Lock()
p, ok := s.pools[addr]
if ok {
s.mu.Unlock()
return p
}
s.pools[addr] = newPool
s.mu.Unlock()
return newPool
}
func (s *Sentinel) newPool(addr string) *redis.Pool {
if s.Pool != nil {
return s.Pool(addr)
}
return s.defaultPool(addr)
}
// close connection pool to Sentinel.
// Lock must be hold by caller.
func (s *Sentinel) close() {
if s.pools != nil {
for _, pool := range s.pools {
pool.Close()
}
}
s.pools = nil
}
func (s *Sentinel) doUntilSuccess(f func(redis.Conn) (interface{}, error)) (interface{}, error) {
s.mu.RLock()
addrs := s.Addrs
s.mu.RUnlock()
var lastErr error
for _, addr := range addrs {
conn := s.get(addr)
reply, err := f(conn)
conn.Close()
if err != nil {
lastErr = err
s.mu.Lock()
pool, ok := s.pools[addr]
if ok {
pool.Close()
delete(s.pools, addr)
}
s.putToBottom(addr)
s.mu.Unlock()
continue
}
s.putToTop(addr)
return reply, nil
}
return nil, NoSentinelsAvailable{lastError: lastErr}
}
// MasterAddr returns an address of current Redis master instance.
func (s *Sentinel) MasterAddr() (string, error) {
res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
return queryForMaster(c, s.MasterName)
})
if err != nil {
return "", err
}
return res.(string), nil
}
// SlaveAddrs returns a slice with known slave addresses of current master instance.
func (s *Sentinel) SlaveAddrs() ([]string, error) {
res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
return queryForSlaveAddrs(c, s.MasterName)
})
if err != nil {
return nil, err
}
return res.([]string), nil
}
// Slave represents a Redis slave instance which is known by Sentinel.
type Slave struct {
ip string
port string
flags string
}
// Addr returns an address of slave.
func (s *Slave) Addr() string {
return net.JoinHostPort(s.ip, s.port)
}
// Available returns if slave is in working state at moment based on information in slave flags.
func (s *Slave) Available() bool {
return !strings.Contains(s.flags, "disconnected") && !strings.Contains(s.flags, "s_down")
}
// Slaves returns a slice with known slaves of master instance.
func (s *Sentinel) Slaves() ([]*Slave, error) {
res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
return queryForSlaves(c, s.MasterName)
})
if err != nil {
return nil, err
}
return res.([]*Slave), nil
}
// SentinelAddrs returns a slice of known Sentinel addresses Sentinel server aware of.
func (s *Sentinel) SentinelAddrs() ([]string, error) {
res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
return queryForSentinels(c, s.MasterName)
})
if err != nil {
return nil, err
}
return res.([]string), nil
}
// Discover allows to update list of known Sentinel addresses. From docs:
//
// A client may update its internal list of Sentinel nodes following this procedure:
// 1) Obtain a list of other Sentinels for this master using the command SENTINEL sentinels <master-name>.
// 2) Add every ip:port pair not already existing in our list at the end of the list.
func (s *Sentinel) Discover() error {
addrs, err := s.SentinelAddrs()
if err != nil {
return err
}
s.mu.Lock()
for _, addr := range addrs {
if !stringInSlice(addr, s.Addrs) {
s.Addrs = append(s.Addrs, addr)
}
}
s.mu.Unlock()
return nil
}
// Close closes current connection to Sentinel.
func (s *Sentinel) Close() error {
s.mu.Lock()
s.close()
s.mu.Unlock()
return nil
}
// TestRole wraps GetRole in a test to verify if the role matches an expected
// role string. If there was any error in querying the supplied connection,
// the function returns false. Works with Redis >= 2.8.12.
// It's not goroutine safe, but if you call this method on pooled connections
// then you are OK.
func TestRole(c redis.Conn, expectedRole string) bool {
role, err := getRole(c)
if err != nil || role != expectedRole {
return false
}
return true
}
// getRole is a convenience function supplied to query an instance (master or
// slave) for its role. It attempts to use the ROLE command introduced in
// redis 2.8.12.
func getRole(c redis.Conn) (string, error) {
res, err := c.Do("ROLE")
if err != nil {
return "", err
}
rres, ok := res.([]interface{})
if ok {
return redis.String(rres[0], nil)
}
return "", errors.New("redigo: can not transform ROLE reply to string")
}
func queryForMaster(conn redis.Conn, masterName string) (string, error) {
res, err := redis.Strings(conn.Do("SENTINEL", "get-master-addr-by-name", masterName))
if err != nil {
return "", err
}
if len(res) < 2 {
return "", errors.New("redigo: malformed get-master-addr-by-name reply")
}
masterAddr := net.JoinHostPort(res[0], res[1])
return masterAddr, nil
}
func queryForSlaveAddrs(conn redis.Conn, masterName string) ([]string, error) {
slaves, err := queryForSlaves(conn, masterName)
if err != nil {
return nil, err
}
slaveAddrs := make([]string, 0)
for _, slave := range slaves {
slaveAddrs = append(slaveAddrs, slave.Addr())
}
return slaveAddrs, nil
}
func queryForSlaves(conn redis.Conn, masterName string) ([]*Slave, error) {
res, err := redis.Values(conn.Do("SENTINEL", "slaves", masterName))
if err != nil {
return nil, err
}
slaves := make([]*Slave, 0)
for _, a := range res {
sm, err := redis.StringMap(a, err)
if err != nil {
return slaves, err
}
slave := &Slave{
ip: sm["ip"],
port: sm["port"],
flags: sm["flags"],
}
slaves = append(slaves, slave)
}
return slaves, nil
}
func queryForSentinels(conn redis.Conn, masterName string) ([]string, error) {
res, err := redis.Values(conn.Do("SENTINEL", "sentinels", masterName))
if err != nil {
return nil, err
}
sentinels := make([]string, 0)
for _, a := range res {
sm, err := redis.StringMap(a, err)
if err != nil {
return sentinels, err
}
sentinels = append(sentinels, fmt.Sprintf("%s:%s", sm["ip"], sm["port"]))
}
return sentinels, nil
}
func stringInSlice(str string, slice []string) bool {
for _, s := range slice {
if s == str {
return true
}
}
return false
}