dls::File + variants for TLS

.gitignore

@@ -1,8 +1,12 @@
 /target
 /dls
 /modd.conf
-/m1_bootstrap-config
-/config.yaml
 /dist
 /dkl
 /tmp
+
+/config.yaml
+
+# dls assets
+/cluster_*_*
+/host_*_*

Cargo.toml

@@ -12,17 +12,23 @@ codegen-units = 1
 
 [dependencies]
 async-compression = { version = "0.4.27", features = ["tokio", "zstd"] }
+base32 = "0.5.1"
 bytes = "1.10.1"
-chrono = { version = "0.4.41", default-features = false, features = ["now"] }
+chrono = { version = "0.4.41", default-features = false, features = ["clock", "now"] }
 clap = { version = "4.5.40", features = ["derive", "env"] }
 clap_complete = { version = "4.5.54", features = ["unstable-dynamic"] }
 env_logger = "0.11.8"
 eyre = "0.6.12"
+futures = "0.3.31"
 futures-util = "0.3.31"
 glob = "0.3.2"
+hex = "0.4.3"
 log = "0.4.27"
+lz4 = "1.28.1"
+nix = { version = "0.30.1", features = ["user"] }
+openssl = "0.10.73"
 page_size = "0.6.0"
-reqwest = { version = "0.12.20", features = ["json", "stream"] }
+reqwest = { version = "0.12.20", features = ["json", "stream", "native-tls"] }
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 serde_yaml = "0.9.34"

src/bin/dkl.rs

@@ -24,21 +24,46 @@ enum Command {
         prefix: String,
     },
     Logger {
-        #[arg(long, short = 'p', default_value = "/var/log")]
+        /// Path where the logs are stored
+        #[arg(long, short = 'p', default_value = "/var/log", env = "DKL_LOG_PATH")]
         log_path: String,
+        /// Name of the log instead of the command's basename
         #[arg(long, short = 'n')]
         log_name: Option<String>,
+        /// prefix log lines with time & stream
         #[arg(long)]
         with_prefix: bool,
         command: String,
         args: Vec<String>,
     },
     Log {
-        #[arg(long, short = 'p', default_value = "/var/log")]
+        /// Path where the logs are stored
+        #[arg(long, short = 'p', default_value = "/var/log", env = "DKL_LOG_PATH")]
         log_path: String,
+        /// Name of the log set to operate on.
         log_name: String,
-        since: Option<String>,
-        until: Option<String>,
+        #[command(subcommand)]
+        op: LogOp,
+    },
+    Dynlay {
+        layer: String,
+        version: String,
+        #[arg(
+            long,
+            short = 'u',
+            default_value = "https://dkl.novit.io/dist/layers",
+            env = "DKL_DYNLAY_URL"
+        )]
+        url_prefix: String,
+        #[arg(
+            long,
+            short = 'd',
+            default_value = "/opt/dynlay",
+            env = "DKL_DYNLAY_DIR"
+        )]
+        layers_dir: String,
+        #[arg(long, default_value = "/")]
+        chroot: std::path::PathBuf,
     },
 }
 
@@ -84,33 +109,118 @@ async fn main() -> Result<()> {
         C::Log {
             log_path,
             log_name,
-            since,
-            until,
+            op,
+        } => op.run(&log_path, &log_name).await,
+        C::Dynlay {
+            ref layer,
+            ref version,
+            ref url_prefix,
+            ref layers_dir,
+            chroot,
         } => {
-            let since = parse_ts_arg(since)?;
-            let until = parse_ts_arg(until)?;
-
-            let mut files = dkl::logger::log_files(&log_path, &log_name).await?;
-            files.sort();
-
-            let mut out = tokio::io::stdout();
-
-            for f in files {
-                if !since.is_none_or(|since| f.timestamp >= since) {
-                    continue;
-                }
-                if !until.is_none_or(|until| f.timestamp <= until) {
-                    continue;
-                }
-
-                debug!("{f:?}");
-                f.copy_to(&mut out).await?;
+            dkl::dynlay::Dynlay {
+                url_prefix,
+                layers_dir,
+                chroot,
             }
-            Ok(())
+            .install(layer, version)
+            .await
         }
     }
 }
 
+async fn apply_config(config_file: &str, filters: &[glob::Pattern], chroot: &str) -> Result<()> {
+    let config = fs::read_to_string(config_file).await?;
+    let config: dkl::Config = serde_yaml::from_str(&config)?;
+
+    let files = if filters.is_empty() {
+        config.files
+    } else {
+        (config.files.into_iter())
+            .filter(|f| filters.iter().any(|filter| filter.matches(&f.path)))
+            .collect()
+    };
+
+    dkl::apply::files(&files, chroot).await
+}
+
+#[derive(Subcommand)]
+enum LogOp {
+    Ls {
+        #[arg(short = 'l', long)]
+        detail: bool,
+    },
+    Cleanup {
+        /// days of log to keep
+        days: u64,
+    },
+    Cat {
+        /// print logs >= since
+        since: Option<String>,
+        /// print logs <= until
+        until: Option<String>,
+    },
+}
+
+impl LogOp {
+    async fn run(self, log_path: &str, log_name: &str) -> Result<()> {
+        let mut files = dkl::logger::log_files(&log_path, &log_name).await?;
+        files.sort();
+
+        use LogOp as Op;
+        match self {
+            Op::Ls { detail } => {
+                for f in files {
+                    let path = f.path.to_string_lossy();
+                    if detail {
+                        println!("{ts} {path}", ts = f.timestamp);
+                    } else {
+                        println!("{path}");
+                    }
+                }
+            }
+            Op::Cleanup { days } => {
+                let deadline = chrono::Utc::now() - chrono::Days::new(days);
+                let deadline = dkl::logger::trunc_ts(deadline);
+                debug!("cleanup {log_name} logs < {deadline}");
+
+                for f in files {
+                    if f.timestamp < deadline {
+                        debug!("removing {}", f.path.to_string_lossy());
+                        fs::remove_file(f.path).await?;
+                    }
+                }
+            }
+            Op::Cat { since, until } => {
+                let since = parse_ts_arg(since)?;
+                let until = parse_ts_arg(until)?;
+
+                let mut out = tokio::io::stdout();
+
+                for f in files {
+                    if !since.is_none_or(|since| f.timestamp >= since) {
+                        continue;
+                    }
+                    if !until.is_none_or(|until| f.timestamp <= until) {
+                        continue;
+                    }
+
+                    debug!(
+                        "cat {path} (timestamp={ts}, compressed={comp})",
+                        path = f.path.to_string_lossy(),
+                        ts = f.timestamp.to_rfc3339(),
+                        comp = f.compressed
+                    );
+                    if let Err(e) = f.copy_to(&mut out).await {
+                        error!("{file}: {e}", file = f.path.to_string_lossy());
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
 fn parse_ts_arg(ts: Option<String>) -> Result<Option<dkl::logger::Timestamp>> {
     match ts {
         None => Ok(None),
@@ -126,21 +236,6 @@ fn basename(path: &str) -> &str {
     path.rsplit_once('/').map_or(path, |split| split.1)
 }
 
-async fn apply_config(config_file: &str, filters: &[glob::Pattern], chroot: &str) -> Result<()> {
-    let config = fs::read_to_string(config_file).await?;
-    let config: dkl::Config = serde_yaml::from_str(&config)?;
-
-    let files = if filters.is_empty() {
-        config.files
-    } else {
-        (config.files.into_iter())
-            .filter(|f| filters.iter().any(|filter| filter.matches(&f.path)))
-            .collect()
-    };
-
-    dkl::apply::files(&files, chroot).await
-}
-
 fn parse_globs(filters: &[String]) -> Result<Vec<glob::Pattern>> {
     let mut errors = false;
     let filters = (filters.iter())

src/bin/dls.rs

@@ -1,14 +1,18 @@
+use bytes::Bytes;
 use clap::{CommandFactory, Parser, Subcommand};
-use eyre::{Result, format_err};
+use eyre::format_err;
+use futures_util::Stream;
 use futures_util::StreamExt;
-use tokio::io::AsyncWriteExt;
+use std::time::{Duration, SystemTime};
+use tokio::fs;
+use tokio::io::{AsyncWrite, AsyncWriteExt};
 
 use dkl::dls;
 
 #[derive(Parser)]
 #[command()]
 struct Cli {
-    #[arg(long, default_value = "http://[::1]:7606")]
+    #[arg(long, default_value = "http://[::1]:7606", env = "DLS_URL")]
     dls: String,
 
     #[command(subcommand)]
@@ -25,9 +29,36 @@ enum Command {
     },
     Hosts,
     Host {
+        #[arg(short = 'o', long)]
+        out: Option<String>,
         host: String,
         asset: Option<String>,
     },
+    #[command(subcommand)]
+    DlSet(DlSet),
+}
+
+#[derive(Subcommand)]
+enum DlSet {
+    Sign {
+        #[arg(short = 'e', long, default_value = "1d")]
+        expiry: String,
+        #[arg(value_parser = parse_download_set_item)]
+        items: Vec<dls::DownloadSetItem>,
+    },
+    Show {
+        #[arg(env = "DLS_DLSET")]
+        signed_set: String,
+    },
+    Fetch {
+        #[arg(long, env = "DLS_DLSET")]
+        signed_set: String,
+        #[arg(short = 'o', long)]
+        out: Option<String>,
+        kind: String,
+        name: String,
+        asset: String,
+    },
 }
 
 #[derive(Subcommand)]
@@ -62,7 +93,7 @@ enum ClusterCommand {
 }
 
 #[tokio::main(flavor = "current_thread")]
-async fn main() -> Result<()> {
+async fn main() -> eyre::Result<()> {
     clap_complete::CompleteEnv::with_factory(Cli::command).complete();
 
     let cli = Cli::parse();
@@ -125,44 +156,110 @@ async fn main() -> Result<()> {
             }
         }
         C::Hosts => write_json(&dls.hosts().await?),
-        C::Host { host, asset } => {
+        C::Host { out, host, asset } => {
             let host_name = host.clone();
             let host = dls.host(host);
             match asset {
                 None => write_json(&host.config().await?),
                 Some(asset) => {
-                    let mut stream = host.asset(&asset).await?;
-
-                    let out_path = format!("{host_name}_{asset}");
-                    eprintln!("writing {host_name} asset {asset} to {out_path}");
-
-                    let out = tokio::fs::File::options()
-                        .mode(0o600)
-                        .write(true)
-                        .create(true)
-                        .truncate(true)
-                        .open(out_path)
-                        .await?;
-                    let mut out = tokio::io::BufWriter::new(out);
-
-                    let mut n = 0u64;
-                    while let Some(chunk) = stream.next().await {
-                        let chunk = chunk?;
-                        n += chunk.len() as u64;
-                        eprint!("wrote {n} bytes\r");
-                        out.write_all(&chunk).await?;
-                    }
-                    eprintln!();
-
-                    out.flush().await?;
+                    let stream = host.asset(&asset).await?;
+                    let mut out = create_asset_file(out, "host", &host_name, &asset).await?;
+                    copy_stream(stream, &mut out).await?;
                 }
             }
         }
+        C::DlSet(set) => match set {
+            DlSet::Sign { expiry, items } => {
+                let req = dls::DownloadSetReq { expiry, items };
+                let signed = dls.sign_dl_set(&req).await?;
+                println!("{signed}");
+            }
+            DlSet::Show { signed_set } => {
+                let raw = base32::decode(base32::Alphabet::Rfc4648 { padding: false }, &signed_set)
+                    .ok_or(format_err!("invalid dlset"))?;
+
+                let sig_len = raw[0] as usize;
+                let (sig, data) = raw[1..].split_at(sig_len);
+                println!("signature: {}...", hex::encode(&sig[..16]));
+
+                let data = lz4::Decoder::new(data)?;
+                let data = std::io::read_to_string(data)?;
+
+                let (expiry, items) = data.split_once('|').ok_or(format_err!("invalid dlset"))?;
+                let expiry = i64::from_str_radix(expiry, 16)?;
+                let expiry = chrono::DateTime::from_timestamp(expiry, 0).unwrap();
+
+                println!("expires on {expiry}");
+
+                for item in items.split('|') {
+                    let mut parts = item.split(':');
+                    let Some(kind) = parts.next() else {
+                        continue;
+                    };
+                    let Some(name) = parts.next() else {
+                        continue;
+                    };
+                    for asset in parts {
+                        println!("- {kind} {name} {asset}");
+                    }
+                }
+            }
+            DlSet::Fetch {
+                signed_set,
+                out,
+                kind,
+                name,
+                asset,
+            } => {
+                let stream = dls.fetch_dl_set(&signed_set, &kind, &name, &asset).await?;
+                let mut out = create_asset_file(out, &kind, &name, &asset).await?;
+                copy_stream(stream, &mut out).await?;
+            }
+        },
     };
 
     Ok(())
 }
 
+async fn create_asset_file(
+    path: Option<String>,
+    kind: &str,
+    name: &str,
+    asset: &str,
+) -> std::io::Result<fs::File> {
+    let path = &path.unwrap_or(format!("{kind}_{name}_{asset}"));
+    eprintln!("writing {kind} {name} asset {asset} to {path}");
+    (fs::File::options().write(true).create(true).truncate(true))
+        .mode(0o600)
+        .open(path)
+        .await
+}
+
+async fn copy_stream(
+    mut stream: impl Stream<Item = reqwest::Result<Bytes>> + Unpin,
+    out: &mut (impl AsyncWrite + Unpin),
+) -> std::io::Result<()> {
+    let mut out = tokio::io::BufWriter::new(out);
+
+    let info_delay = Duration::from_secs(1);
+    let mut ts = SystemTime::now();
+
+    let mut n = 0u64;
+    while let Some(chunk) = stream.next().await {
+        let chunk = chunk.map_err(|e| std::io::Error::other(e))?;
+        n += chunk.len() as u64;
+        out.write_all(&chunk).await?;
+
+        if ts.elapsed().is_ok_and(|t| t >= info_delay) {
+            eprint!("wrote {n} bytes\r");
+            ts = SystemTime::now();
+        }
+    }
+    eprintln!("wrote {n} bytes");
+
+    out.flush().await
+}
+
 fn write_json<T: serde::ser::Serialize>(v: &T) {
     let data = serde_json::to_string_pretty(v).expect("value should serialize to json");
     println!("{data}");
@@ -172,6 +269,20 @@ fn write_raw(raw: &[u8]) {
     use std::io::Write;
 
     let mut out = std::io::stdout();
-    out.write(raw).expect("stdout write");
+    out.write_all(raw).expect("stdout write");
     out.flush().expect("stdout flush");
 }
+
+fn parse_download_set_item(s: &str) -> Result<dls::DownloadSetItem, std::io::Error> {
+    let err = |s: &str| std::io::Error::other(s);
+
+    let mut parts = s.split(':');
+
+    let item = dls::DownloadSetItem {
+        kind: parts.next().ok_or(err("no kind"))?.to_string(),
+        name: parts.next().ok_or(err("no name"))?.to_string(),
+        assets: parts.map(|p| p.to_string()).collect(),
+    };
+
+    Ok(item)
+}

src/bootstrap.rs

@@ -2,7 +2,7 @@ use std::collections::BTreeMap as Map;
 
 pub const TAKE_ALL: i16 = -1;
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct Config {
     pub anti_phishing_code: String,
 
@@ -14,20 +14,22 @@ pub struct Config {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub resolv_conf: Option<String>,
 
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "Map::is_empty")]
     pub vpns: Map<String, String>,
 
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub networks: Vec<Network>,
 
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub auths: Vec<Auth>,
     #[serde(default)]
     pub ssh: SSHServer,
 
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub pre_lvm_crypt: Vec<CryptDev>,
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub lvm: Vec<LvmVG>,
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub crypt: Vec<CryptDev>,
 
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -36,7 +38,30 @@ pub struct Config {
     pub bootstrap: Bootstrap,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+impl Config {
+    pub fn new(bootstrap_dev: String) -> Self {
+        Self {
+            anti_phishing_code: "Direktil<3".into(),
+            keymap: None,
+            modules: None,
+            resolv_conf: None,
+            vpns: Map::new(),
+            networks: vec![],
+            auths: vec![],
+            ssh: Default::default(),
+            pre_lvm_crypt: vec![],
+            lvm: vec![],
+            crypt: vec![],
+            signer_public_key: None,
+            bootstrap: Bootstrap {
+                dev: bootstrap_dev,
+                seed: None,
+            },
+        }
+    }
+}
+
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct Auth {
     pub name: String,
     #[serde(alias = "sshKey")]
@@ -46,18 +71,21 @@ pub struct Auth {
     pub password: Option<String>,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct Network {
     pub name: String,
     pub interfaces: Vec<NetworkInterface>,
     pub script: String,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct NetworkInterface {
     pub var: String,
     pub n: i16,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub regexps: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub udev: Option<UdevFilter>,
 }
 
 #[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
@@ -74,7 +102,7 @@ impl Default for SSHServer {
     }
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct LvmVG {
     #[serde(alias = "vg")]
     pub name: String,
@@ -86,7 +114,7 @@ pub struct LvmVG {
     pub lvs: Vec<LvmLV>,
 }
 
-#[derive(Debug, Default, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, Default, serde::Deserialize, serde::Serialize)]
 pub struct LvmLVDefaults {
     #[serde(default)]
     pub fs: Filesystem,
@@ -94,9 +122,10 @@ pub struct LvmLVDefaults {
     pub raid: Raid,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Default, Debug, serde::Deserialize, serde::Serialize)]
 #[serde(rename_all = "snake_case")]
 pub enum Filesystem {
+    #[default]
     Ext4,
     Xfs,
     Btrfs,
@@ -115,13 +144,7 @@ impl Filesystem {
     }
 }
 
-impl Default for Filesystem {
-    fn default() -> Self {
-        Filesystem::Ext4
-    }
-}
-
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct LvmLV {
     pub name: String,
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -132,61 +155,98 @@ pub struct LvmLV {
     pub size: LvSize,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 #[serde(rename_all = "snake_case")]
 pub enum LvSize {
     Size(String),
     Extents(String),
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct LvmPV {
     pub n: i16,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub regexps: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub udev: Option<UdevFilter>,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct CryptDev {
     pub name: String,
-    #[serde(flatten)]
-    pub filter: DevFilter,
+    // hit the limit of enum representation here (flatten + enum variant case)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub dev: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub prefix: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub udev: Option<UdevFilter>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub optional: Option<bool>,
 }
 impl CryptDev {
+    pub fn filter(&self) -> DevFilter<'_> {
+        if let Some(dev) = self.dev.as_deref() {
+            DevFilter::Dev(dev)
+        } else if let Some(prefix) = self.prefix.as_deref() {
+            DevFilter::Prefix(prefix)
+        } else if let Some(udev) = self.udev.as_ref() {
+            DevFilter::Udev(udev)
+        } else {
+            DevFilter::None
+        }
+    }
+
     pub fn optional(&self) -> bool {
-        self.optional.unwrap_or_else(|| self.filter.is_prefix())
+        self.optional.unwrap_or_else(|| match self.filter() {
+            DevFilter::None => true,
+            DevFilter::Dev(_) => false,
+            DevFilter::Prefix(_) => true,
+            DevFilter::Udev(_) => true,
+        })
     }
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[test]
+fn test_parse_crypt_dev() {
+    for s in [
+        "name: sys0\ndev: /dev/sda\n",
+        "name: crypt-\nprefix: /dev/sd\n",
+        "name: crypt-${name}\nudev: !glob [ DEVNAME, /dev/sd* ]\n",
+    ] {
+        let dev: CryptDev = serde_yaml::from_str(s).unwrap();
+        dev.filter();
+        dev.optional();
+    }
+}
+
+pub enum DevFilter<'t> {
+    None,
+    Dev(&'t str),
+    Prefix(&'t str),
+    Udev(&'t UdevFilter),
+}
+
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 #[serde(rename_all = "snake_case")]
-pub enum DevFilter {
-    Dev(String),
-    Prefix(String),
-}
-impl DevFilter {
-    pub fn is_dev(&self) -> bool {
-        match self {
-            Self::Dev(_) => true,
-            _ => false,
-        }
-    }
-    pub fn is_prefix(&self) -> bool {
-        match self {
-            Self::Prefix(_) => true,
-            _ => false,
-        }
-    }
+pub enum UdevFilter {
+    Has(String),
+    Eq(String, String),
+    Glob(String, String),
+    And(Vec<UdevFilter>),
+    Or(Vec<UdevFilter>),
+    Not(Box<UdevFilter>),
 }
 
-#[derive(Debug, Default, Clone, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, Default, serde::Deserialize, serde::Serialize)]
 pub struct Raid {
     pub mirrors: Option<u8>,
     pub stripes: Option<u8>,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
 pub struct Bootstrap {
     pub dev: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub seed: Option<String>,
 }

src/dls.rs

@@ -5,6 +5,7 @@ use reqwest::Method;
 use std::collections::BTreeMap as Map;
 use std::fmt::Display;
 use std::net::IpAddr;
+use std::time::Duration;
 
 pub struct Client {
     base_url: String,
@@ -33,7 +34,7 @@ impl Client {
         self.get_json("clusters").await
     }
 
-    pub fn cluster(&self, name: String) -> Cluster {
+    pub fn cluster(&self, name: String) -> Cluster<'_> {
         Cluster { dls: self, name }
     }
 
@@ -41,16 +42,30 @@ impl Client {
         self.get_json("hosts").await
     }
 
-    pub fn host(&self, name: String) -> Host {
+    pub fn host(&self, name: String) -> Host<'_> {
         Host { dls: self, name }
     }
 
-    pub async fn get_json<T: serde::de::DeserializeOwned>(&self, path: impl Display) -> Result<T> {
-        let req = self.get(&path)?.header("Accept", "application/json");
+    pub async fn sign_dl_set(&self, req: &DownloadSetReq) -> Result<String> {
+        let req = (self.req(Method::POST, "sign-download-set")?).json(req);
+        self.req_json(req).await
+    }
+    pub async fn fetch_dl_set(
+        &self,
+        signed_dlset: &str,
+        kind: &str,
+        name: &str,
+        asset: &str,
+    ) -> Result<impl Stream<Item = reqwest::Result<Bytes>>> {
+        let req = self.get(format!(
+            "public/download-set/{kind}/{name}/{asset}?set={signed_dlset}"
+        ))?;
         let resp = do_req(req, &self.token).await?;
+        Ok(resp.bytes_stream())
+    }
 
-        let body = resp.bytes().await.map_err(Error::Read)?;
-        serde_json::from_slice(&body).map_err(Error::Parse)
+    pub async fn get_json<T: serde::de::DeserializeOwned>(&self, path: impl Display) -> Result<T> {
+        self.req_json(self.get(&path)?).await
     }
     pub async fn get_bytes(&self, path: impl Display) -> Result<Vec<u8>> {
         let resp = do_req(self.get(&path)?, &self.token).await?;
@@ -60,6 +75,16 @@ impl Client {
         self.req(Method::GET, path)
     }
 
+    pub async fn req_json<T: serde::de::DeserializeOwned>(
+        &self,
+        req: reqwest::RequestBuilder,
+    ) -> Result<T> {
+        let req = req.header("Accept", "application/json");
+        let resp = do_req(req, &self.token).await?;
+
+        let body = resp.bytes().await.map_err(Error::Read)?;
+        serde_json::from_slice(&body).map_err(Error::Parse)
+    }
     pub fn req(&self, method: Method, path: impl Display) -> Result<reqwest::RequestBuilder> {
         let uri = format!("{}/{path}", self.base_url);
 
@@ -143,22 +168,33 @@ pub struct ClusterConfig {
     pub addons: String,
 }
 
-#[derive(serde::Deserialize, serde::Serialize)]
+#[derive(Default, serde::Deserialize, serde::Serialize)]
 #[serde(rename_all = "PascalCase")]
 pub struct HostConfig {
     pub name: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub cluster_name: Option<String>,
 
-    pub annotations: Map<String, String>,
-    pub bootstrap_config: String,
-    #[serde(rename = "IPXE")]
-    pub ipxe: Option<String>,
     #[serde(rename = "IPs")]
     pub ips: Vec<IpAddr>,
+
+    #[serde(skip_serializing_if = "Map::is_empty")]
+    pub labels: Map<String, String>,
+    #[serde(skip_serializing_if = "Map::is_empty")]
+    pub annotations: Map<String, String>,
+
+    #[serde(rename = "IPXE", skip_serializing_if = "Option::is_none")]
+    pub ipxe: Option<String>,
+
     pub initrd: String,
     pub kernel: String,
-    pub labels: Map<String, String>,
     pub versions: Map<String, String>,
+
+    pub bootstrap_config: String,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub initrd_files: Vec<crate::File>,
+
+    pub config: String,
 }
 
 #[derive(serde::Deserialize, serde::Serialize)]
@@ -184,6 +220,23 @@ pub struct KubeSignReq {
     pub validity: Option<String>,
 }
 
+#[derive(serde::Deserialize, serde::Serialize)]
+#[serde(rename_all = "PascalCase")]
+pub struct DownloadSetReq {
+    pub expiry: String,
+    #[serde(skip_serializing_if = "Vec::is_empty")]
+    pub items: Vec<DownloadSetItem>,
+}
+
+#[derive(Clone, serde::Deserialize, serde::Serialize)]
+#[serde(rename_all = "PascalCase")]
+pub struct DownloadSetItem {
+    pub kind: String,
+    pub name: String,
+    #[serde(skip_serializing_if = "Vec::is_empty")]
+    pub assets: Vec<String>,
+}
+
 #[derive(Debug, serde::Deserialize, serde::Serialize)]
 struct ServerError {
     #[serde(default)]
@@ -253,3 +306,50 @@ pub enum Error {
     #[error("response parsing failed: {0}")]
     Parse(serde_json::Error),
 }
+
+#[derive(serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum File {
+    Static(crate::File),
+    Gen { path: String, from: ContentGen },
+}
+
+#[derive(serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum ContentGen {
+    CaCrt(CaRef),
+    TlsKey(TlsRef),
+    TlsCrt {
+        key: TlsRef,
+        ca: CaRef,
+        profile: CertProfile,
+    },
+}
+
+#[derive(serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum CaRef {
+    Global(String),
+    Cluster(String, String),
+}
+
+#[derive(serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum TlsRef {
+    Cluster(String, String),
+    Host(String, String),
+}
+
+#[derive(serde::Serialize, serde::Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum CertProfile {
+    Client,
+    Server,
+    /// basicaly Client+Server
+    Peer,
+    Kube {
+        user: String,
+        group: String,
+        duration: Duration,
+    },
+}

src/dynlay.rs

@@ -0,0 +1,188 @@
+use eyre::{format_err, Result};
+use log::{debug, error, info, warn};
+use std::path::PathBuf;
+use tokio::{fs, io::AsyncWriteExt, process::Command};
+
+use crate::fs::spawn_walk_dir;
+
+pub struct Dynlay<'t> {
+    pub url_prefix: &'t str,
+    pub layers_dir: &'t str,
+    pub chroot: PathBuf,
+}
+
+impl<'t> Dynlay<'t> {
+    pub async fn install(&self, layer: &str, version: &str) -> Result<()> {
+        let lay_dir = &format!("{base}/{layer}", base = self.layers_dir);
+
+        debug!("mkdir -p {lay_dir}");
+        fs::create_dir_all(lay_dir).await?;
+
+        let lay_path = &format!("{lay_dir}/{version}");
+
+        if !fs::try_exists(lay_path).await? {
+            let part_file = &format!("{lay_dir}/{version}.tmp");
+
+            self.fetch(layer, version, part_file).await?;
+
+            (fs::rename(part_file, lay_path).await)
+                .map_err(|e| format_err!("failed mv {part_file} {lay_path}: {e}"))?;
+        }
+
+        let mount_path = PathBuf::from(lay_dir).join("mounts").join(layer);
+
+        (fs::create_dir_all(&mount_path).await)
+            .map_err(|e| format_err!("mkdir -p {mount_path:?} failed: {e}"))?;
+
+        let mount_path = &fs::canonicalize(mount_path).await?;
+        let mount_path_str = &mount_path.to_string_lossy().into_owned();
+
+        if is_mount_point(mount_path_str).await? {
+            info!("clearing previous mount");
+
+            let mut paths = spawn_walk_dir(mount_path.clone());
+            while let Some(result) = paths.recv().await {
+                let Ok((path, md)) = result else {
+                    continue;
+                };
+                if !md.is_dir() {
+                    let path = self.chroot.join(&path);
+
+                    debug!("rm {path:?}");
+                    if let Err(e) = fs::remove_file(&path).await {
+                        warn!("rm {path:?} failed: {e}");
+                    }
+                }
+            }
+
+            sudo("umount", &[mount_path]).await?;
+        }
+
+        // mount layer
+        info!("mounting layer");
+        sudo("mount", &["-t", "squashfs", lay_path, &mount_path_str]).await?;
+
+        let mut paths = spawn_walk_dir(mount_path.clone());
+        while let Some(result) = paths.recv().await {
+            let Ok((path, md)) = result else {
+                continue;
+            };
+
+            let target = self.chroot.join(&path);
+
+            if md.is_dir() {
+                debug!("mkdir -p {target:?}");
+                if let Err(e) = fs::create_dir_all(&target).await {
+                    error!("mkdir -p {target:?} failed: {e}");
+                }
+            } else {
+                let _ = fs::remove_file(&target).await;
+
+                let source = mount_path.join(&path);
+
+                debug!("ln -s {source:?} {target:?}");
+                if let Err(e) = fs::symlink(&source, &target).await {
+                    error!("ln -s {source:?} {target:?} failed: {e}");
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    async fn fetch(&self, layer: &str, version: &str, part_file: &str) -> Result<()> {
+        let url = &format!("{}/{layer}/{version}", self.url_prefix);
+        info!("fetching {url}");
+
+        let mut out = (fs::File::create(part_file).await)
+            .map_err(|e| format_err!("failed to open {part_file}: {e}"))?;
+
+        let resp = reqwest::get(url).await?;
+        if !resp.status().is_success() {
+            return Err(format_err!("fetch failed: {}", resp.status()));
+        }
+
+        let sha1 = (resp.headers().get("x-content-sha1"))
+            .ok_or(format_err!("no content hash in response"))?;
+        let sha1 = (sha1.to_str()).map_err(|e| format_err!("invalid sha1: {e}"))?;
+
+        debug!("content sha1: {sha1}");
+        let mut exp_sha1 = [0; 20];
+        hex::decode_to_slice(sha1, &mut exp_sha1).map_err(|e| format_err!("invalid sha1: {e}"))?;
+
+        let mut hash = openssl::sha::Sha1::new();
+
+        use futures::StreamExt;
+        let mut stream = resp.bytes_stream();
+        while let Some(bytes) = stream.next().await {
+            let bytes = bytes.map_err(|e| format_err!("remote read error: {e}"))?;
+            hash.update(&bytes);
+            (out.write_all(&bytes).await).map_err(|e| format_err!("local write error: {e}"))?;
+        }
+
+        (out.flush().await).map_err(|e| format_err!("local write error: {e}"))?;
+        drop(out);
+
+        let dl_sha1 = hash.finish();
+        if dl_sha1 != exp_sha1 {
+            if let Err(e) = fs::remove_file(part_file).await {
+                error!("failed to remove {part_file}: {e}");
+            }
+            return Err(format_err!(
+                "invalid content hash: expected {exp}, got {got}",
+                exp = hex::encode(exp_sha1),
+                got = hex::encode(dl_sha1)
+            ));
+        }
+
+        Ok(())
+    }
+}
+
+async fn sudo<I, S>(program: &str, args: I) -> Result<()>
+where
+    I: IntoIterator<Item = S>,
+    S: AsRef<std::ffi::OsStr>,
+{
+    let mut cmd = if nix::unistd::geteuid().is_root() {
+        let mut cmd = Command::new(program);
+        cmd.args(args);
+        cmd
+    } else {
+        let mut cmd = Command::new("sudo");
+        cmd.arg(program).args(args);
+        cmd
+    };
+    let status = cmd.status().await?;
+    if status.success() {
+        Ok(())
+    } else {
+        Err(format_err!("{program} failed: {status}"))
+    }
+}
+
+async fn is_mount_point(target: &str) -> Result<bool> {
+    for line in fs::read_to_string("/proc/self/mounts").await?.lines() {
+        let line = line.trim_ascii();
+        if line.is_empty() || line.starts_with("#") {
+            continue;
+        }
+
+        let split: Vec<_> = line.split_ascii_whitespace().collect();
+        if split.len() < 6 {
+            continue;
+        }
+
+        // let dev = split[0];
+        let mount_point = split[1];
+        // let fstype = split[2];
+        // let mntops = split[3];
+        // let fs_freq = split[4];
+        // let fsck_passno = split[5];
+
+        if mount_point == target {
+            return Ok(true);
+        }
+    }
+    Ok(false)
+}

src/fs.rs

@@ -0,0 +1,60 @@
+use eyre::Result;
+use std::fs::Metadata;
+use std::path::PathBuf;
+use tokio::fs::read_dir;
+use tokio::sync::mpsc;
+
+pub fn spawn_walk_dir(
+    dir: impl Into<PathBuf> + Send + 'static,
+) -> mpsc::Receiver<Result<(PathBuf, Metadata)>> {
+    let (tx, rx) = mpsc::channel(1);
+    tokio::spawn(walk_dir(dir, tx));
+    rx
+}
+
+pub async fn walk_dir(dir: impl Into<PathBuf>, tx: mpsc::Sender<Result<(PathBuf, Metadata)>>) {
+    let dir: PathBuf = dir.into();
+
+    let mut todo = std::collections::LinkedList::new();
+    if let Ok(rd) = read_dir(&dir).await {
+        todo.push_front(rd);
+    }
+
+    while let Some(rd) = todo.front_mut() {
+        let entry = match rd.next_entry().await {
+            Ok(v) => v,
+            Err(e) => {
+                if tx.send(Err(e.into())).await.is_err() {
+                    return;
+                }
+                todo.pop_front(); // skip dir on error
+                continue;
+            }
+        };
+
+        let Some(entry) = entry else {
+            todo.pop_front();
+            continue;
+        };
+
+        let Ok(md) = entry.metadata().await else {
+            continue;
+        };
+        let is_dir = md.is_dir();
+
+        let Ok(path) = entry.path().strip_prefix(&dir).map(|p| p.to_path_buf()) else {
+            continue; // sub-entry not in dir, weird but semantically, we ignore
+        };
+
+        if tx.send(Ok((path, md))).await.is_err() {
+            return;
+        }
+
+        // recurse in sub directories
+        if is_dir {
+            if let Ok(rd) = read_dir(entry.path()).await {
+                todo.push_front(rd);
+            }
+        }
+    }
+}

src/lib.rs

@@ -1,9 +1,11 @@
 pub mod apply;
 pub mod bootstrap;
 pub mod dls;
+pub mod dynlay;
+pub mod fs;
 pub mod logger;
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Debug, Default, serde::Deserialize, serde::Serialize)]
 pub struct Config {
     pub layers: Vec<String>,
     pub root_user: RootUser,
@@ -17,18 +19,20 @@ pub struct Config {
     pub users: Vec<User>,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Debug, Default, serde::Deserialize, serde::Serialize)]
 pub struct RootUser {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub password_hash: Option<String>,
     pub authorized_keys: Vec<String>,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Debug, Default, serde::Deserialize, serde::Serialize)]
 pub struct Mount {
-    pub r#type: Option<String>,
     pub dev: String,
     pub path: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub r#type: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub options: Option<String>,
 }
 

src/logger.rs

@@ -35,7 +35,7 @@ impl<'t> Logger<'t> {
         let archives_read_dir = (fs::read_dir(archives_path).await)
             .map_err(|e| format_err!("failed to list archives: {e}"))?;
 
-        let mut prev_stamp = ts_trunc(Utc::now());
+        let mut prev_stamp = trunc_ts(Utc::now());
         let mut current_log = BufWriter::new(self.open_log(prev_stamp).await?);
 
         tokio::spawn(compress_archives(
@@ -94,7 +94,7 @@ impl<'t> Logger<'t> {
         prev_stamp: &mut Timestamp,
         out: &mut BufWriter<File>,
     ) -> Result<()> {
-        let trunc_ts = ts_trunc(log.ts);
+        let trunc_ts = trunc_ts(log.ts);
         if *prev_stamp < trunc_ts {
             // switch log
             out.flush().await?;
@@ -193,7 +193,7 @@ async fn copy(
     }
 }
 
-fn ts_trunc(ts: Timestamp) -> Timestamp {
+pub fn trunc_ts(ts: Timestamp) -> Timestamp {
     ts.duration_trunc(TRUNC_DELTA)
         .expect("duration_trunc failed")
 }
@@ -243,7 +243,7 @@ async fn compress(path: impl AsRef<Path>) {
             .await
             .map_err(|e| format_err!("open {path_str} failed: {e}"))?;
 
-        let out_path = path.with_extension("zstd");
+        let out_path = path.with_extension("zst");
         let out = (File::create(&out_path).await) // create output
             .map_err(|e| format_err!("create {} failed: {e}", out_path.to_string_lossy()))?;
 
@@ -285,14 +285,16 @@ pub async fn log_files(log_path: &str, log_name: &str) -> std::io::Result<Vec<Lo
             continue;
         };
 
-        let (name, compressed) = file_name
-            .strip_suffix(".zstd")
-            .map_or((file_name, false), |s| (s, true));
-
-        let Some(name) = name.strip_suffix(".log") else {
+        let Some((name, ext)) = file_name.rsplit_once('.') else {
             continue;
         };
 
+        let compressed = match ext {
+            "zst" => true,
+            "log" => false,
+            _ => continue,
+        };
+
         let Some((name, timestamp)) = name.rsplit_once('.') else {
             continue;
         };
@@ -331,12 +333,12 @@ impl PartialOrd for LogFile {
 
 impl LogFile {
     pub async fn copy_to(&self, out: &mut (impl AsyncWrite + Unpin)) -> io::Result<u64> {
-        let mut input = File::open(&self.path).await?;
+        let input = &mut File::open(&self.path).await?;
         if self.compressed {
-            let mut out = ZstdDecoder::new(out);
-            tokio::io::copy(&mut input, &mut out).await
+            let out = &mut ZstdDecoder::new(out);
+            tokio::io::copy(input, out).await
         } else {
-            tokio::io::copy(&mut input, out).await
+            tokio::io::copy(input, out).await
         }
     }
 }

test-dkl

@@ -3,7 +3,7 @@ set -ex
 
 dkl=target/debug/dkl
 
-test=${1:-log}
+test=${1:-dynlay}
 
 export RUST_LOG=debug
 
@@ -19,8 +19,20 @@ case $test in
     cat tmp/log/bash.log
     ;;
 
-  log)
-    $dkl log --log-path tmp/log bash 20250720_12 20250720_16
+  log-ls)
+    $dkl log --log-path tmp/log bash ls -l
+    ;;
+  log-cat)
+    $dkl log --log-path tmp/log bash cat 20250720_12 20301231_23
+    ;;
+  log-clean)
+    $dkl log --log-path tmp/log bash ls -l
+    $dkl log --log-path tmp/log bash cleanup 0
+    ;;
+
+  dynlay)
+    mkdir -p tmp/system
+    $dkl dynlay --layers-dir tmp/dynlay --chroot tmp/system kubernetes v1.33.3_containerd.2.0.5
     ;;
 
   *) echo 1>&2 "unknown test: $test"; exit 1 ;;

test-dls

@@ -18,3 +18,12 @@ $dls cluster cluster ssh-sign ~/.ssh/id_ed25519.pub
 $dls host m1 | jq '{Name, ClusterName, IPs}'
 $dls host m1 bootstrap-config
 
+export DLS_DLSET=$($dls dl-set sign --expiry 1d \
+    cluster:cluster:addons \
+    host:m1:kernel:initrd:bootstrap.tar \
+    host:m2:config:bootstrap-config:boot.vmdk)
+
+$dls dl-set show
+$dls dl-set fetch host m2 bootstrap-config
+rm host_m2_bootstrap-config
+