-
Notifications
You must be signed in to change notification settings - Fork 0
/
pool.go
252 lines (225 loc) · 6.1 KB
/
pool.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
package resolver
import (
"context"
"fmt"
"net/http"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/remotes"
"github.com/containerd/containerd/remotes/docker"
distreference "github.com/distribution/reference"
"github.com/khulnasoft/devkit/session"
"github.com/khulnasoft/devkit/solver/pb"
"github.com/khulnasoft/devkit/version"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// DefaultPool is the default shared resolver pool instance
var DefaultPool = NewPool()
// Pool is a cache of recently used resolvers
type Pool struct {
mu sync.Mutex
m map[string]*authHandlerNS
}
// NewPool creates a new pool for caching resolvers
func NewPool() *Pool {
p := &Pool{
m: map[string]*authHandlerNS{},
}
time.AfterFunc(5*time.Minute, p.gc)
return p
}
func (p *Pool) gc() {
p.mu.Lock()
defer p.mu.Unlock()
for k, ns := range p.m {
ns.muHandlers.Lock()
for key, h := range ns.handlers {
if time.Since(h.lastUsed) < 10*time.Minute {
continue
}
parts := strings.SplitN(key, "/", 2)
if len(parts) != 2 {
delete(ns.handlers, key)
continue
}
c, err := ns.sm.Get(context.TODO(), parts[1], true)
if c == nil || err != nil {
delete(ns.handlers, key)
}
}
if len(ns.handlers) == 0 {
delete(p.m, k)
}
ns.muHandlers.Unlock()
}
time.AfterFunc(5*time.Minute, p.gc)
}
// Clear deletes currently cached items. This may be called on config changes for example.
func (p *Pool) Clear() {
p.mu.Lock()
defer p.mu.Unlock()
p.m = map[string]*authHandlerNS{}
}
// GetResolver gets a resolver for a specified scope from the pool
func (p *Pool) GetResolver(hosts docker.RegistryHosts, ref, scope string, sm *session.Manager, g session.Group) *Resolver {
name := ref
named, err := distreference.ParseNormalizedNamed(ref)
if err == nil {
name = named.Name()
}
key := fmt.Sprintf("%s::%s", name, scope)
p.mu.Lock()
defer p.mu.Unlock()
h, ok := p.m[key]
if !ok {
h = newAuthHandlerNS(sm)
p.m[key] = h
}
return newResolver(hosts, h, sm, g)
}
func newResolver(hosts docker.RegistryHosts, handler *authHandlerNS, sm *session.Manager, g session.Group) *Resolver {
if hosts == nil {
hosts = docker.ConfigureDefaultRegistries(
docker.WithClient(newDefaultClient()),
docker.WithPlainHTTP(docker.MatchLocalhost),
)
}
r := &Resolver{
hosts: hosts,
sm: sm,
g: g,
handler: handler,
}
headers := http.Header{}
headers.Set("User-Agent", version.UserAgent())
r.Resolver = docker.NewResolver(docker.ResolverOptions{
Hosts: r.HostsFunc,
Headers: headers,
})
return r
}
// Resolver is a wrapper around remotes.Resolver
type Resolver struct {
remotes.Resolver
hosts docker.RegistryHosts
sm *session.Manager
g session.Group
handler *authHandlerNS
auth *dockerAuthorizer
is images.Store
mode ResolveMode
}
// HostsFunc implements registry configuration of this Resolver
func (r *Resolver) HostsFunc(host string) ([]docker.RegistryHost, error) {
return func(domain string) ([]docker.RegistryHost, error) {
v, err := r.handler.g.Do(context.TODO(), domain, func(ctx context.Context) ([]docker.RegistryHost, error) {
// long lock not needed because flightcontrol.Do
r.handler.muHosts.Lock()
v, ok := r.handler.hosts[domain]
r.handler.muHosts.Unlock()
if ok {
return v, nil
}
res, err := r.hosts(domain)
if err != nil {
return nil, err
}
r.handler.muHosts.Lock()
r.handler.hosts[domain] = res
r.handler.muHosts.Unlock()
return res, nil
})
if err != nil || v == nil {
return nil, err
}
if len(v) == 0 {
return nil, nil
}
// make a copy so authorizer is set on unique instance
res := make([]docker.RegistryHost, len(v))
copy(res, v)
auth := newDockerAuthorizer(res[0].Client, r.handler, r.sm, r.g)
for i := range res {
res[i].Authorizer = auth
}
return res, nil
}(host)
}
// WithSession returns a new resolver that works with new session group
func (r *Resolver) WithSession(s session.Group) *Resolver {
r2 := *r
r2.auth = nil
r2.g = s
r2.Resolver = docker.NewResolver(docker.ResolverOptions{
Hosts: r2.HostsFunc, // this refers to the newly-configured session so we need to recreate the resolver.
})
return &r2
}
// WithImageStore returns new resolver that can also resolve from local images store
func (r *Resolver) WithImageStore(is images.Store, mode ResolveMode) *Resolver {
r2 := *r
r2.Resolver = r.Resolver
r2.is = is
r2.mode = mode
return &r2
}
// Fetcher returns a new fetcher for the provided reference.
func (r *Resolver) Fetcher(ctx context.Context, ref string) (remotes.Fetcher, error) {
if atomic.LoadInt64(&r.handler.counter) == 0 {
r.Resolve(ctx, ref)
}
return r.Resolver.Fetcher(ctx, ref)
}
// Resolve attempts to resolve the reference into a name and descriptor.
func (r *Resolver) Resolve(ctx context.Context, ref string) (string, ocispecs.Descriptor, error) {
if r.mode == ResolveModePreferLocal && r.is != nil {
if img, err := r.is.Get(ctx, ref); err == nil {
return ref, img.Target, nil
}
}
n, desc, err := r.Resolver.Resolve(ctx, ref)
if err == nil {
atomic.AddInt64(&r.handler.counter, 1)
return n, desc, nil
}
if r.mode == ResolveModeDefault && r.is != nil {
if img, err := r.is.Get(ctx, ref); err == nil {
return ref, img.Target, nil
}
}
return "", ocispecs.Descriptor{}, err
}
type ResolveMode int
const (
ResolveModeDefault ResolveMode = iota
ResolveModeForcePull
ResolveModePreferLocal
)
func (r ResolveMode) String() string {
switch r {
case ResolveModeDefault:
return pb.AttrImageResolveModeDefault
case ResolveModeForcePull:
return pb.AttrImageResolveModeForcePull
case ResolveModePreferLocal:
return pb.AttrImageResolveModePreferLocal
default:
return ""
}
}
func ParseImageResolveMode(v string) (ResolveMode, error) {
switch v {
case pb.AttrImageResolveModeDefault, "":
return ResolveModeDefault, nil
case pb.AttrImageResolveModeForcePull:
return ResolveModeForcePull, nil
case pb.AttrImageResolveModePreferLocal:
return ResolveModePreferLocal, nil
default:
return 0, errors.Errorf("invalid resolvemode: %s", v)
}
}