direktil/initrd
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push dkl init boot logic here

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This commit is contained in:
Mikaël Cluseau 2023-12-04 13:59:37 +01:00
parent 1555419549
commit 164fde7631
1 changed files with 39 additions and 0 deletions
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39
boot-v1.go
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@ -5,6 +5,7 @@ import (
"log"
"os"
"path/filepath"
"strconv"
"strings"
"syscall"
"time"
@ -119,6 +120,13 @@ func applyConfig(cfgPath string, bootMounted bool) (cfg *configV1) {
mount("overlay", "/system", "overlay", rootMountFlags,
"lowerdir="+strings.Join(lowers, ":")+",upperdir=/changes/upperdir,workdir=/changes/workdir")
// make root rshared (default in systemd, required by Kubernetes 1.10+)
// equivalent to "mount --make-rshared /"
// see kernel's Documentation/sharedsubtree.txt (search rshared)
if err := syscall.Mount("", "/system", "", syscall.MS_SHARED|syscall.MS_REC, ""); err != nil {
fatalf("FATAL: mount --make-rshared / failed: %v", err)
}
if bootMounted {
if layersInMemory {
if err := syscall.Unmount("/boot", 0); err != nil {
@ -158,6 +166,37 @@ func applyConfig(cfgPath string, bootMounted bool) (cfg *configV1) {
}
}
// - groups
for _, group := range cfg.Groups {
log.Print("creating group ", group.Name)
opts := make([]string, 0)
opts = append(opts /* chroot */, "/system", "groupadd", "-r")
if group.Gid != 0 {
opts = append(opts, "-g", strconv.Itoa(group.Gid))
}
opts = append(opts, group.Name)
run("chroot", opts...)
}
// - user
for _, user := range cfg.Users {
log.Print("creating user ", user.Name)
opts := make([]string, 0)
opts = append(opts /* chroot */, "/system", "useradd", "-r")
if user.Gid != 0 {
opts = append(opts, "-g", strconv.Itoa(user.Gid))
}
if user.Uid != 0 {
opts = append(opts, "-u", strconv.Itoa(user.Uid))
}
opts = append(opts, user.Name)
run("chroot", opts...)
}
return
}