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|
package main
import (
"bufio"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/canonical/lxd/shared"
)
var checkedKeys = []string{
"lxc.aa_allow_incomplete",
"lxc.aa_profile",
"lxc.apparmor.allow_incomplete",
"lxc.apparmor.profile",
"lxc.arch",
"lxc.autodev",
"lxc.cap.drop",
"lxc.environment",
"lxc.haltsignal",
"lxc.id_map",
"lxc.idmap",
"lxc.include",
"lxc.loglevel",
"lxc.mount",
"lxc.mount.auto",
"lxc.mount.entry",
"lxc.pts",
"lxc.pty.max",
"lxc.rebootsignal",
"lxc.rootfs",
"lxc.rootfs.backend",
"lxc.rootfs.mount",
"lxc.rootfs.path",
"lxc.seccomp",
"lxc.signal.halt",
"lxc.signal.reboot",
"lxc.signal.stop",
"lxc.start.auto",
"lxc.start.delay",
"lxc.start.order",
"lxc.stopsignal",
"lxc.tty",
"lxc.tty.max",
"lxc.uts.name",
"lxc.utsname",
"lxd.migrated",
}
func getUnsupportedKeys(config []string) []string {
var out []string
for _, a := range config {
supported := false
for _, b := range checkedKeys {
if a == b {
supported = true
break
}
}
if !supported {
out = append(out, a)
}
}
return out
}
func getConfig(config []string, key string) []string {
// Return an array since keys can be specified more than once
var out []string
for _, c := range config {
text := strings.TrimSpace(c)
// Ignore empty lines and comments
if len(text) == 0 || strings.HasPrefix(text, "#") {
continue
}
line := strings.Split(text, "=")
if len(line) != 2 {
continue
}
k := strings.TrimSpace(line[0])
v := strings.Trim(strings.TrimSpace(line[1]), "\"")
if k == key && len(v) > 0 {
out = append(out, v)
}
}
if len(out) == 0 {
return nil
}
return out
}
func getConfigKeys(config []string) []string {
// Make sure we don't have duplicate keys
m := make(map[string]bool)
for _, c := range config {
text := strings.TrimSpace(c)
// Ignore empty lines and comments
if len(text) == 0 || strings.HasPrefix(text, "#") {
continue
}
line := strings.Split(text, "=")
key := strings.TrimSpace(line[0])
if strings.HasPrefix(key, "lxc.") {
m[key] = true
}
}
var out []string
for k := range m {
out = append(out, k)
}
return out
}
func parseConfig(path string) ([]string, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer func() { _ = file.Close() }()
var config []string
// Parse config
sc := bufio.NewScanner(file)
for sc.Scan() {
text := strings.TrimSpace(sc.Text())
// Ignore empty lines and comments
if len(text) == 0 || strings.HasPrefix(text, "#") {
continue
}
line := strings.Split(text, "=")
if len(line) != 2 {
continue
}
key := strings.TrimSpace(line[0])
value := strings.TrimSpace(line[1])
switch key {
// Parse user-added includes
case "lxc.include":
// Ignore our own default configs
if strings.HasPrefix(value, "/usr/share/lxc/config/") {
continue
}
if shared.PathExists(value) {
if shared.IsDir(value) {
files, err := os.ReadDir(value)
if err != nil {
return nil, err
}
for _, file := range files {
path := filepath.Join(value, file.Name())
if !strings.HasSuffix(path, ".conf") {
continue
}
config = append(config, path)
}
} else {
c, err := parseConfig(value)
if err != nil {
return nil, err
}
config = append(config, c...)
}
continue
}
// Expand any fstab
case "lxc.mount":
if !shared.PathExists(value) {
fmt.Println("Container fstab file doesn't exist, skipping...")
continue
}
file, err := os.Open(value)
if err != nil {
return nil, err
}
defer func() { _ = file.Close() }()
sc := bufio.NewScanner(file)
for sc.Scan() {
text := strings.TrimSpace(sc.Text())
if len(text) > 0 && !strings.HasPrefix(text, "#") {
config = append(config, fmt.Sprintf("lxc.mount.entry = %s", text))
}
}
continue
default:
config = append(config, text)
}
}
return config, nil
}
|
