Add support for configmaps

This is part of #22

Author: cgwalters

lib/Cargo.toml

@@ -19,6 +19,7 @@ hex = "^0.4"
 fn-error-context = "0.2.0"
 gvariant = "0.4.0"
 indicatif = "0.17.0"
+k8s-openapi = { version = "0.17.0", features = ["v1_25"], optional = true }
 libc = "^0.2"
 liboverdrop = "0.1.0"
 once_cell = "1.9"
@@ -36,11 +37,15 @@ tempfile = "3.3.0"
 toml = "0.7.2"
 xshell = { version = "0.2", optional = true }
 uuid = { version = "1.2.2", features = ["v4"] }
+reqwest = { version = "0.11.14", features = ["json"] }
+serde_yaml = "0.9.17"
 
 [features]
-default = ["install"]
+default = ["install", "k8s-base"]
 # This feature enables `bootc install`.  Disable if you always want to use an external installer.
 install = []
+# This feature enables `bootc config`.  Disable if you don't want to support dynamic reconfiguration.
+k8s-base = ["k8s-openapi"]
 # Implementation detail of man page generation.
 docgen = ["clap_mangen"]
 # This feature should only be enabled in CI environments.

lib/src/cli.rs

@@ -14,6 +14,7 @@ use ostree_ext::container as ostree_container;
 use ostree_ext::container::SignatureSource;
 use ostree_ext::keyfileext::KeyFileExt;
 use ostree_ext::ostree;
+use ostree_ext::ostree::Deployment;
 use ostree_ext::sysroot::SysrootLock;
 use std::ffi::OsString;
 use std::os::unix::process::CommandExt;
@@ -109,6 +110,9 @@ pub(crate) enum Opt {
     /// Add a transient writable overlayfs on `/usr` that will be discarded on reboot.
     #[clap(alias = "usroverlay")]
     UsrOverlay,
+    /// Manipulate configuration
+    #[clap(subcommand)]
+    Config(crate::config::ConfigOpts),
     /// Install to the target block device
     #[cfg(feature = "install")]
     Install(crate::install::InstallOpts),
@@ -208,7 +212,7 @@ async fn pull(
 
 /// Stage (queue deployment of) a fetched container image.
 #[context("Staging")]
-async fn stage(
+pub(crate) async fn stage(
     sysroot: &SysrootLock,
     stateroot: &str,
     imgref: &ostree_container::OstreeImageReference,
@@ -244,7 +248,7 @@ pub(crate) fn require_root() -> Result<()> {
 
 /// A few process changes that need to be made for writing.
 #[context("Preparing for write")]
-async fn prepare_for_write() -> Result<()> {
+pub(crate) async fn prepare_for_write() -> Result<()> {
     if ostree_ext::container_utils::is_ostree_container()? {
         anyhow::bail!(
             "Detected container (ostree base); this command requires a booted host system."
@@ -257,16 +261,21 @@ async fn prepare_for_write() -> Result<()> {
     Ok(())
 }
 
+pub(crate) fn target_deployment(sysroot: &SysrootLock) -> Result<Deployment> {
+    let booted_deployment = sysroot.require_booted_deployment()?;
+    Ok(sysroot.staged_deployment().unwrap_or(booted_deployment))
+}
+
 /// Implementation of the `bootc upgrade` CLI command.
 #[context("Upgrading")]
 async fn upgrade(opts: UpgradeOpts) -> Result<()> {
     prepare_for_write().await?;
     let sysroot = &get_locked_sysroot().await?;
     let repo = &sysroot.repo();
-    let booted_deployment = &sysroot.require_booted_deployment()?;
-    let status = crate::status::DeploymentStatus::from_deployment(booted_deployment, true)?;
-    let osname = booted_deployment.osname();
-    let origin = booted_deployment
+    let merge_deployment = &target_deployment(sysroot)?;
+    let status = crate::status::DeploymentStatus::from_deployment(merge_deployment, true)?;
+    let osname = merge_deployment.osname();
+    let origin = merge_deployment
         .origin()
         .ok_or_else(|| anyhow::anyhow!("Deployment is missing an origin"))?;
     let imgref = status
@@ -278,7 +287,7 @@ async fn upgrade(opts: UpgradeOpts) -> Result<()> {
             "Booted deployment contains local rpm-ostree modifications; cannot upgrade via bootc"
         ));
     }
-    let commit = booted_deployment.csum();
+    let commit = merge_deployment.csum();
     let state = ostree_container::store::query_image_commit(repo, &commit)?;
     let digest = state.manifest_digest.as_str();
     let fetched = pull(repo, &imgref, opts.quiet).await?;
@@ -303,11 +312,11 @@ async fn switch(opts: SwitchOpts) -> Result<()> {
     prepare_for_write().await?;
 
     let cancellable = gio::Cancellable::NONE;
-    let sysroot = get_locked_sysroot().await?;
-    let booted_deployment = &sysroot.require_booted_deployment()?;
-    let (origin, booted_image) = crate::utils::get_image_origin(booted_deployment)?;
+    let sysroot = &get_locked_sysroot().await?;
+    let merge_deployment = &target_deployment(sysroot)?;
+    let (origin, booted_image) = crate::utils::get_image_origin(merge_deployment)?;
     let booted_refspec = origin.optional_string("origin", "refspec")?;
-    let osname = booted_deployment.osname();
+    let osname = merge_deployment.osname();
     let repo = &sysroot.repo();
 
     let transport = ostree_container::Transport::try_from(opts.transport.as_str())?;
@@ -373,6 +382,8 @@ where
         Opt::Upgrade(opts) => upgrade(opts).await,
         Opt::Switch(opts) => switch(opts).await,
         Opt::UsrOverlay => usroverlay().await,
+        #[cfg(feature = "k8s-base")]
+        Opt::Config(opts) => crate::config::run(opts).await,
         #[cfg(feature = "install")]
         Opt::Install(opts) => crate::install::install(opts).await,
         #[cfg(feature = "install")]