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https://github.com/k3s-io/k3s.git
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618b0f98bf
Support repository regex rewrite rules when fetching image content.
Example configuration:
```yaml
# /etc/rancher/k3s/registries.yaml
mirrors:
"docker.io":
endpoint:
- "https://registry-1.docker.io/v2"
rewrite:
"^library/alpine$": "my-org/alpine"
```
This will instruct k3s containerd to fetch content for `alpine` images
from `docker.io/my-org/alpine` instead of the default
`docker.io/library/alpine` locations.
Signed-off-by: Jacob Blain Christen <jacob@rancher.com>
118 lines
3.1 KiB
Go
118 lines
3.1 KiB
Go
// +build linux darwin
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/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 sysx
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import (
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"bytes"
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"golang.org/x/sys/unix"
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)
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// Listxattr calls syscall listxattr and reads all content
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// and returns a string array
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func Listxattr(path string) ([]string, error) {
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return listxattrAll(path, unix.Listxattr)
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}
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// Removexattr calls syscall removexattr
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func Removexattr(path string, attr string) (err error) {
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return unix.Removexattr(path, attr)
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}
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// Setxattr calls syscall setxattr
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func Setxattr(path string, attr string, data []byte, flags int) (err error) {
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return unix.Setxattr(path, attr, data, flags)
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}
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// Getxattr calls syscall getxattr
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func Getxattr(path, attr string) ([]byte, error) {
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return getxattrAll(path, attr, unix.Getxattr)
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}
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// LListxattr lists xattrs, not following symlinks
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func LListxattr(path string) ([]string, error) {
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return listxattrAll(path, unix.Llistxattr)
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}
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// LRemovexattr removes an xattr, not following symlinks
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func LRemovexattr(path string, attr string) (err error) {
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return unix.Lremovexattr(path, attr)
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}
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// LSetxattr sets an xattr, not following symlinks
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func LSetxattr(path string, attr string, data []byte, flags int) (err error) {
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return unix.Lsetxattr(path, attr, data, flags)
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}
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// LGetxattr gets an xattr, not following symlinks
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func LGetxattr(path, attr string) ([]byte, error) {
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return getxattrAll(path, attr, unix.Lgetxattr)
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}
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const defaultXattrBufferSize = 128
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type listxattrFunc func(path string, dest []byte) (int, error)
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func listxattrAll(path string, listFunc listxattrFunc) ([]string, error) {
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buf := make([]byte, defaultXattrBufferSize)
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n, err := listFunc(path, buf)
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for err == unix.ERANGE {
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// Buffer too small, use zero-sized buffer to get the actual size
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n, err = listFunc(path, []byte{})
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if err != nil {
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return nil, err
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}
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buf = make([]byte, n)
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n, err = listFunc(path, buf)
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}
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if err != nil {
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return nil, err
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}
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ps := bytes.Split(bytes.TrimSuffix(buf[:n], []byte{0}), []byte{0})
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var entries []string
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for _, p := range ps {
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if len(p) > 0 {
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entries = append(entries, string(p))
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}
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}
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return entries, nil
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}
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type getxattrFunc func(string, string, []byte) (int, error)
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func getxattrAll(path, attr string, getFunc getxattrFunc) ([]byte, error) {
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buf := make([]byte, defaultXattrBufferSize)
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n, err := getFunc(path, attr, buf)
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for err == unix.ERANGE {
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// Buffer too small, use zero-sized buffer to get the actual size
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n, err = getFunc(path, attr, []byte{})
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if err != nil {
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return nil, err
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}
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buf = make([]byte, n)
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n, err = getFunc(path, attr, buf)
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}
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if err != nil {
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return nil, err
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}
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return buf[:n], nil
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}
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