push dkl init boot logic here
This commit is contained in:
Mikaël Cluseau
parent
1555419549
commit
898c43b954
45
boot-v1.go
45
boot-v1.go
@ -1,10 +1,10 @@
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package main
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"syscall"
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"time"
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@ -104,10 +104,7 @@ func applyConfig(cfgPath string, bootMounted bool) (cfg *configV1) {
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lowers[i] = dir
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loopDev := fmt.Sprintf("/dev/loop%d", i+loopOffset)
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losetup(loopDev, path)
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mount(loopDev, dir, "squashfs", layerMountFlags, "")
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mountSquahfs(path, dir)
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}
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// prepare system root
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@ -119,6 +116,13 @@ func applyConfig(cfgPath string, bootMounted bool) (cfg *configV1) {
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mount("overlay", "/system", "overlay", rootMountFlags,
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"lowerdir="+strings.Join(lowers, ":")+",upperdir=/changes/upperdir,workdir=/changes/workdir")
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// make root rshared (default in systemd, required by Kubernetes 1.10+)
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// equivalent to "mount --make-rshared /"
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// see kernel's Documentation/sharedsubtree.txt (search rshared)
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if err := syscall.Mount("", "/system", "", syscall.MS_SHARED|syscall.MS_REC, ""); err != nil {
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fatalf("FATAL: mount --make-rshared / failed: %v", err)
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}
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if bootMounted {
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if layersInMemory {
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if err := syscall.Unmount("/boot", 0); err != nil {
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@ -158,6 +162,37 @@ func applyConfig(cfgPath string, bootMounted bool) (cfg *configV1) {
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}
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}
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// - groups
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for _, group := range cfg.Groups {
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log.Print("creating group ", group.Name)
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opts := make([]string, 0)
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opts = append(opts /* chroot */, "/system", "groupadd", "-r")
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if group.Gid != 0 {
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opts = append(opts, "-g", strconv.Itoa(group.Gid))
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}
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opts = append(opts, group.Name)
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run("chroot", opts...)
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}
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// - user
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for _, user := range cfg.Users {
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log.Print("creating user ", user.Name)
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opts := make([]string, 0)
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opts = append(opts /* chroot */, "/system", "useradd", "-r")
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if user.Gid != 0 {
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opts = append(opts, "-g", strconv.Itoa(user.Gid))
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}
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if user.Uid != 0 {
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opts = append(opts, "-u", strconv.Itoa(user.Uid))
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}
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opts = append(opts, user.Name)
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run("chroot", opts...)
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}
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return
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}
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22
boot-v2.go
22
boot-v2.go
@ -13,6 +13,9 @@ import (
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func bootV2() {
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log.Print("-- boot v2 --")
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kernelVersion := unameRelease()
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log.Print("Linux version ", kernelVersion)
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cfg := &config.Config{}
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{
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@ -35,19 +38,18 @@ func bootV2() {
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auths = cfg.Auths
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// mount kernel modules
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if cfg.Modules != "" {
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log.Print("mount modules from ", cfg.Modules)
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if cfg.Modules == "" {
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log.Print("NOT mounting modules (nothing specified)")
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} else {
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mountSquahfs(cfg.Modules, "/modules")
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err := os.MkdirAll("/modules", 0755)
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if err != nil {
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fatal("failed to create /modules: ", err)
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modulesSourcePath := "/modules/lib/modules/" + kernelVersion
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if _, err := os.Stat(modulesSourcePath); err != nil {
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fatal("invalid modules dir: ", err)
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}
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run("mount", cfg.Modules, "/modules")
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loopOffset++
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err = os.Symlink("/modules/lib/modules", "/lib/modules")
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if err != nil {
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os.MkdirAll("/lib/modules", 0755)
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if err := os.Symlink(modulesSourcePath, "/lib/modules/"+kernelVersion); err != nil {
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fatal("failed to symlink modules: ", err)
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}
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}
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@ -1,5 +0,0 @@
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from golang:1.18beta2-alpine3.15
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run apk add --update musl-dev git
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workdir /src
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25
go.mod
25
go.mod
@ -1,12 +1,13 @@
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module novit.nc/direktil/initrd
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require (
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github.com/freddierice/go-losetup/v2 v2.0.1
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github.com/kr/pty v1.1.8
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github.com/pkg/term v1.1.0
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golang.org/x/crypto v0.5.0
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golang.org/x/sys v0.4.0
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golang.org/x/term v0.4.0
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golang.zx2c4.com/wireguard/wgctrl v0.0.0-20221104135756-97bc4ad4a1cb
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golang.org/x/crypto v0.16.0
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golang.org/x/sys v0.15.0
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golang.org/x/term v0.15.0
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golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6
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gopkg.in/yaml.v2 v2.4.0
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gopkg.in/yaml.v3 v3.0.1
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novit.tech/direktil/pkg v0.0.0-20230201224712-5e39572dc50e
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@ -14,15 +15,15 @@ require (
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require (
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github.com/cavaliergopher/cpio v1.0.1 // indirect
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github.com/creack/pty v1.1.18 // indirect
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github.com/google/go-cmp v0.5.9 // indirect
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github.com/creack/pty v1.1.21 // indirect
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github.com/google/go-cmp v0.6.0 // indirect
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github.com/josharian/native v1.1.0 // indirect
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github.com/mdlayher/genetlink v1.3.1 // indirect
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github.com/mdlayher/netlink v1.7.1 // indirect
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github.com/mdlayher/socket v0.4.0 // indirect
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golang.org/x/net v0.5.0 // indirect
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golang.org/x/sync v0.1.0 // indirect
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golang.zx2c4.com/wireguard v0.0.0-20220920152132-bb719d3a6e2c // indirect
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github.com/mdlayher/genetlink v1.3.2 // indirect
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github.com/mdlayher/netlink v1.7.2 // indirect
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github.com/mdlayher/socket v0.5.0 // indirect
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golang.org/x/net v0.19.0 // indirect
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golang.org/x/sync v0.5.0 // indirect
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golang.zx2c4.com/wireguard v0.0.0-20231022001213-2e0774f246fb // indirect
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)
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go 1.21
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27
go.sum
27
go.sum
@ -3,8 +3,14 @@ github.com/cavaliergopher/cpio v1.0.1/go.mod h1:pBdaqQjnvXxdS/6CvNDwIANIFSP0xRKI
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github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
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github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
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github.com/creack/pty v1.1.18/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
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github.com/creack/pty v1.1.21 h1:1/QdRyBaHHJP61QkWMXlOIBfsgdDeeKfK8SYVUWJKf0=
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github.com/creack/pty v1.1.21/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
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github.com/freddierice/go-losetup/v2 v2.0.1 h1:wPDx/Elu9nDV8y/CvIbEDz5Xi5Zo80y4h7MKbi3XaAI=
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github.com/freddierice/go-losetup/v2 v2.0.1/go.mod h1:TEyBrvlOelsPEhfWD5rutNXDmUszBXuFnwT1kIQF4J8=
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github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
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github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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github.com/josharian/native v1.1.0 h1:uuaP0hAbW7Y4l0ZRQ6C9zfb7Mg1mbFKry/xzDAfmtLA=
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github.com/josharian/native v1.1.0/go.mod h1:7X/raswPFr05uY3HiLlYeyQntB6OO7E/d2Cu7qoaN2w=
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github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
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@ -16,37 +22,58 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
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github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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github.com/mdlayher/genetlink v1.3.1 h1:roBiPnual+eqtRkKX2Jb8UQN5ZPWnhDCGj/wR6Jlz2w=
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github.com/mdlayher/genetlink v1.3.1/go.mod h1:uaIPxkWmGk753VVIzDtROxQ8+T+dkHqOI0vB1NA9S/Q=
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github.com/mdlayher/genetlink v1.3.2 h1:KdrNKe+CTu+IbZnm/GVUMXSqBBLqcGpRDa0xkQy56gw=
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github.com/mdlayher/genetlink v1.3.2/go.mod h1:tcC3pkCrPUGIKKsCsp0B3AdaaKuHtaxoJRz3cc+528o=
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github.com/mdlayher/netlink v1.7.1 h1:FdUaT/e33HjEXagwELR8R3/KL1Fq5x3G5jgHLp/BTmg=
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github.com/mdlayher/netlink v1.7.1/go.mod h1:nKO5CSjE/DJjVhk/TNp6vCE1ktVxEA8VEh8drhZzxsQ=
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github.com/mdlayher/netlink v1.7.2 h1:/UtM3ofJap7Vl4QWCPDGXY8d3GIY2UGSDbK+QWmY8/g=
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github.com/mdlayher/netlink v1.7.2/go.mod h1:xraEF7uJbxLhc5fpHL4cPe221LI2bdttWlU+ZGLfQSw=
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github.com/mdlayher/socket v0.4.0 h1:280wsy40IC9M9q1uPGcLBwXpcTQDtoGwVt+BNoITxIw=
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github.com/mdlayher/socket v0.4.0/go.mod h1:xxFqz5GRCUN3UEOm9CZqEJsAbe1C8OwSK46NlmWuVoc=
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github.com/mdlayher/socket v0.5.0 h1:ilICZmJcQz70vrWVes1MFera4jGiWNocSkykwwoy3XI=
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github.com/mdlayher/socket v0.5.0/go.mod h1:WkcBFfvyG8QENs5+hfQPl1X6Jpd2yeLIYgrGFmJiJxI=
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github.com/mikioh/ipaddr v0.0.0-20190404000644-d465c8ab6721 h1:RlZweED6sbSArvlE924+mUcZuXKLBHA35U7LN621Bws=
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github.com/mikioh/ipaddr v0.0.0-20190404000644-d465c8ab6721/go.mod h1:Ickgr2WtCLZ2MDGd4Gr0geeCH5HybhRJbonOgQpvSxc=
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github.com/pkg/term v1.1.0 h1:xIAAdCMh3QIAy+5FrE8Ad8XoDhEU4ufwbaSozViP9kk=
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github.com/pkg/term v1.1.0/go.mod h1:E25nymQcrSllhX42Ok8MRm1+hyBdHY0dCeiKZ9jpNGw=
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github.com/ulikunitz/xz v0.5.6/go.mod h1:2bypXElzHzzJZwzH67Y6wb67pO62Rzfn7BSiF4ABRW8=
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golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
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golang.org/x/crypto v0.5.0 h1:U/0M97KRkSFvyD/3FSmdP5W5swImpNgle/EHFhOsQPE=
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golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU=
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golang.org/x/crypto v0.16.0 h1:mMMrFzRSCF0GvB7Ne27XVtVAaXLrPmgPC7/v0tkwHaY=
|
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golang.org/x/crypto v0.16.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
|
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golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
|
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golang.org/x/net v0.5.0 h1:GyT4nK/YDHSqa1c4753ouYCDajOYKTja9Xb/OHtgvSw=
|
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golang.org/x/net v0.5.0/go.mod h1:DivGGAXEgPSlEBzxGzZI+ZLohi+xUj054jfeKui00ws=
|
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golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
|
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golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
|
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golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
|
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golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
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golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
|
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golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
|
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golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
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golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
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golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
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golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=
|
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golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
|
||||
golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
|
||||
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
|
||||
golang.org/x/term v0.4.0 h1:O7UWfv5+A2qiuulQk30kVinPoMtoIPeVaKLEgLpVkvg=
|
||||
golang.org/x/term v0.4.0/go.mod h1:9P2UbLfCdcvo3p/nzKvsmas4TnlujnuoV9hGgYzW1lQ=
|
||||
golang.org/x/term v0.15.0 h1:y/Oo/a/q3IXu26lQgl04j/gjuBDOBlx7X6Om1j2CPW4=
|
||||
golang.org/x/term v0.15.0/go.mod h1:BDl952bC7+uMoWR75FIrCDx79TPU9oHkTZ9yRbYOrX0=
|
||||
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
|
||||
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
|
||||
golang.zx2c4.com/wireguard v0.0.0-20220920152132-bb719d3a6e2c h1:Okh6a1xpnJslG9Mn84pId1Mn+Q8cvpo4HCeeFWHo0cA=
|
||||
golang.zx2c4.com/wireguard v0.0.0-20220920152132-bb719d3a6e2c/go.mod h1:enML0deDxY1ux+B6ANGiwtg0yAJi1rctkTpcHNAVPyg=
|
||||
golang.zx2c4.com/wireguard v0.0.0-20231022001213-2e0774f246fb h1:c5tyN8sSp8jSDxdCCDXVOpJwYXXhmTkNMt+g0zTSOic=
|
||||
golang.zx2c4.com/wireguard v0.0.0-20231022001213-2e0774f246fb/go.mod h1:tkCQ4FQXmpAgYVh++1cq16/dH4QJtmvpRv19DWGAHSA=
|
||||
golang.zx2c4.com/wireguard/wgctrl v0.0.0-20221104135756-97bc4ad4a1cb h1:9aqVcYEDHmSNb0uOWukxV5lHV09WqiSiCuhEgWNETLY=
|
||||
golang.zx2c4.com/wireguard/wgctrl v0.0.0-20221104135756-97bc4ad4a1cb/go.mod h1:mQqgjkW8GQQcJQsbBvK890TKqUK1DfKWkuBGbOkuMHQ=
|
||||
golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6 h1:CawjfCvYQH2OU3/TnxLx97WDSUDRABfT18pCOYwc2GE=
|
||||
golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6/go.mod h1:3rxYc4HtVcSG9gVaTs2GEBdehh+sYPOwKtyUWEOTb80=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
|
||||
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
|
||||
26
losetup.go
Normal file
26
losetup.go
Normal file
@ -0,0 +1,26 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"syscall"
|
||||
|
||||
"github.com/freddierice/go-losetup/v2"
|
||||
)
|
||||
|
||||
var loDevices = map[string]losetup.Device{}
|
||||
|
||||
func losetupAttach(file string) losetup.Device {
|
||||
if _, ok := loDevices[file]; !ok {
|
||||
dev, err := losetup.Attach(file, 0, true)
|
||||
if err != nil {
|
||||
fatalf("failed to attach %q to a loop device: %v", file, err)
|
||||
}
|
||||
|
||||
loDevices[file] = dev
|
||||
}
|
||||
return loDevices[file]
|
||||
}
|
||||
|
||||
func mountSquahfs(source, target string) {
|
||||
dev := losetupAttach(source)
|
||||
mount(dev.Path(), target, "squashfs", syscall.MS_RDONLY, "")
|
||||
}
|
||||
4
main.go
4
main.go
@ -192,10 +192,6 @@ mainLoop:
|
||||
}
|
||||
}
|
||||
|
||||
func losetup(dev, file string) {
|
||||
run("/sbin/losetup", "-r", dev, file)
|
||||
}
|
||||
|
||||
func run(cmd string, args ...string) {
|
||||
if output, err := exec.Command(cmd, args...).CombinedOutput(); err != nil {
|
||||
fatalf("command %s %q failed: %v\n%s", cmd, args, err, string(output))
|
||||
|
||||
17
modd.conf
17
modd.conf
@ -1,24 +1,13 @@
|
||||
modd.conf {}
|
||||
|
||||
alpine/Dockerfile {
|
||||
prep: docker build -t dkl-initrd alpine
|
||||
prep: docker run --rm dkl-initrd | base64 -d >dist/base-initrd
|
||||
}
|
||||
|
||||
buildenv/Dockerfile {
|
||||
prep: docker build -t dkl-initrd-build buildenv
|
||||
}
|
||||
|
||||
go.??? **/*.go {
|
||||
prep: go test ./...
|
||||
prep: mkdir -p dist
|
||||
prep: go build -o dist/ ./tools/...
|
||||
|
||||
prep: mkdir -p tmp/go tmp/.cache
|
||||
prep: docker run --rm -v novit-go:/go -e GOCACHE=/go/.cache -v $PWD:/src -u $(id -u):$(id -g) dkl-initrd-build go build -o dist/init .
|
||||
}
|
||||
|
||||
dist/init dist/base-initrd {
|
||||
prep: cd dist && ../dist/cpiocat init <base-initrd >initrd.new
|
||||
dist/init Dockerfile {
|
||||
prep: docker build -t novit-initrd-gen .
|
||||
prep: docker run novit-initrd-gen |base64 -d >dist/initrd.new
|
||||
prep: mv dist/initrd.new dist/initrd
|
||||
}
|
||||
|
||||
20
uname.go
Normal file
20
uname.go
Normal file
@ -0,0 +1,20 @@
|
||||
package main
|
||||
|
||||
import "syscall"
|
||||
|
||||
func unameRelease() string {
|
||||
uname := &syscall.Utsname{}
|
||||
if err := syscall.Uname(uname); err != nil {
|
||||
fatalf("failed to get kernel version: %v", err)
|
||||
}
|
||||
|
||||
ba := make([]byte, 0, len(uname.Release))
|
||||
for _, c := range uname.Release {
|
||||
if c == 0 {
|
||||
break
|
||||
}
|
||||
ba = append(ba, byte(c))
|
||||
}
|
||||
|
||||
return string(ba)
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user