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compress initrds with zstd

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This commit is contained in:
Mikaël Cluseau
2025-07-21 17:37:29 +02:00
parent 899a0a9dab
commit af2758dead
3 changed files with 21 additions and 2 deletions
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18
cmd/dkl-local-server/bootv2.go
View File

@ -11,6 +11,7 @@ import (
"net/http"
"os"
"github.com/klauspost/compress/zstd"
yaml "gopkg.in/yaml.v2"
"novit.tech/direktil/pkg/cpiocat"
@ -39,7 +40,12 @@ func buildInitrd(out io.Writer, ctx *renderContext) (err error) {
return
}
cat := cpiocat.New(out)
zout, err := zstd.NewWriter(out, zstd.WithEncoderLevel(zstd.EncoderLevelFromZstd(12)))
if err != nil {
return fmt.Errorf("zstd writer setup failed: %w", err)
}
cat := cpiocat.New(zout)
// initrd
initrdPath, err := distFetch("initrd", ctx.Host.Initrd)
@ -88,7 +94,15 @@ func buildInitrd(out io.Writer, ctx *renderContext) (err error) {
cat.AppendBytes(userCA, "user_ca.pub", 0600)
return cat.Close()
if err = cat.Close(); err != nil {
return fmt.Errorf("cpio close failed: %w", err)
}
if err = zout.Close(); err != nil {
return fmt.Errorf("zstd close failed: %w", err)
}
return
}
func buildBootstrap(out io.Writer, ctx *renderContext) (err error) {

1
go.mod
View File

@ -55,6 +55,7 @@ require (
github.com/json-iterator/go v1.1.12 // indirect
github.com/kevinburke/ssh_config v1.2.0 // indirect
github.com/kisielk/sqlstruct v0.0.0-20210630145711-dae28ed37023 // indirect
github.com/klauspost/compress v1.18.0 // indirect
github.com/mailru/easyjson v0.9.0 // indirect
github.com/mitchellh/go-homedir v1.1.0 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect

4
go.sum
View File

@ -3,6 +3,8 @@ dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA=
filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/DataDog/zstd v1.5.7 h1:ybO8RBeh29qrxIhCA9E8gKY6xfONU9T6G6aP9DTKfLE=
github.com/DataDog/zstd v1.5.7/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
@ -128,6 +130,8 @@ github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4
github.com/kevinburke/ssh_config v1.2.0/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
github.com/kisielk/sqlstruct v0.0.0-20210630145711-dae28ed37023 h1:/pb3UJ+3ZtSEUKWnufwsoVF7f0AX5ytPULbTwHMgbq4=
github.com/kisielk/sqlstruct v0.0.0-20210630145711-dae28ed37023/go.mod h1:yyMNCyc/Ib3bDTKd379tNMpB/7/H5TjM2Y9QJ5THLbE=
github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=