Add "rhsm" feature for integration with Red Hat Subscription Manager

This adds a new subcommand `bootc internals publish-rhsm-facts` which
writes out facts data to /etc/rhsm/facts/bootc.json

Signed-off-by: John Eckersberg <[email protected]>

lib/Cargo.toml

@@ -56,6 +56,9 @@ static_assertions = { workspace = true }
 default = ["install"]
 # This feature enables `bootc install`.  Disable if you always want to use an external installer.
 install = []
+# This featuares enables `bootc internals publish-rhsm-facts` to integrate with
+# Red Hat Subscription Manager
+rhsm = []
 # Implementation detail of man page generation.
 docgen = ["clap_mangen"]
 

lib/src/cli.rs

@@ -373,6 +373,9 @@ pub(crate) enum InternalsOpts {
         // The stateroot
         stateroot: String,
     },
+    #[cfg(feature = "rhsm")]
+    /// Publish subscription-manager facts to /etc/rhsm/facts/bootc.json
+    PublishRhsmFacts,
 }
 
 #[derive(Debug, clap::Subcommand, PartialEq, Eq)]
@@ -1094,6 +1097,8 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
                 let rootfs = &Dir::open_ambient_dir("/", cap_std::ambient_authority())?;
                 crate::install::completion::run_from_ostree(rootfs, &sysroot, &stateroot).await
             }
+            #[cfg(feature = "rhsm")]
+            InternalsOpts::PublishRhsmFacts => crate::rhsm::publish_facts(&root).await,
         },
         #[cfg(feature = "docgen")]
         Opt::Man(manopts) => crate::docgen::generate_manpages(&manopts.directory),

lib/src/lib.rs

@@ -42,3 +42,6 @@ mod install;
 mod kernel;
 #[cfg(feature = "install")]
 pub(crate) mod mount;
+
+#[cfg(feature = "rhsm")]
+mod rhsm;

lib/src/rhsm.rs

@@ -0,0 +1,128 @@
+//! Integration with Red Hat Subscription Manager
+
+use anyhow::Result;
+use cap_std::fs::{Dir, OpenOptions};
+use cap_std_ext::cap_std;
+use fn_error_context::context;
+use serde::Serialize;
+
+const FACTS_PATH: &str = "etc/rhsm/facts/bootc.json";
+
+#[derive(Serialize)]
+struct RhsmFacts {
+    #[serde(rename = "bootc.booted.image")]
+    booted_image: String,
+    #[serde(rename = "bootc.booted.version")]
+    booted_version: String,
+    #[serde(rename = "bootc.booted.digest")]
+    booted_digest: String,
+    #[serde(rename = "bootc.staged.image")]
+    staged_image: String,
+    #[serde(rename = "bootc.staged.version")]
+    staged_version: String,
+    #[serde(rename = "bootc.staged.digest")]
+    staged_digest: String,
+    #[serde(rename = "bootc.rollback.image")]
+    rollback_image: String,
+    #[serde(rename = "bootc.rollback.version")]
+    rollback_version: String,
+    #[serde(rename = "bootc.rollback.digest")]
+    rollback_digest: String,
+    #[serde(rename = "bootc.available.image")]
+    available_image: String,
+    #[serde(rename = "bootc.available.version")]
+    available_version: String,
+    #[serde(rename = "bootc.available.digest")]
+    available_digest: String,
+}
+
+impl From<crate::spec::HostStatus> for RhsmFacts {
+    fn from(hoststatus: crate::spec::HostStatus) -> Self {
+        let (booted_image, booted_version, booted_digest) = hoststatus
+            .booted
+            .as_ref()
+            .and_then(|boot_entry| {
+                boot_entry.image.as_ref().map(|imagestatus| {
+                    let image = imagestatus.image.image.clone();
+                    let version = imagestatus.version.as_ref().cloned().unwrap_or_default();
+                    let digest = imagestatus.image_digest.clone();
+
+                    (image, digest, version)
+                })
+            })
+            .unwrap_or_default();
+
+        let (staged_image, staged_version, staged_digest) = hoststatus
+            .staged
+            .as_ref()
+            .and_then(|boot_entry| {
+                boot_entry.image.as_ref().map(|imagestatus| {
+                    let image = imagestatus.image.image.clone();
+                    let version = imagestatus.version.as_ref().cloned().unwrap_or_default();
+                    let digest = imagestatus.image_digest.clone();
+
+                    (image, digest, version)
+                })
+            })
+            .unwrap_or_default();
+
+        let (rollback_image, rollback_version, rollback_digest) = hoststatus
+            .rollback
+            .as_ref()
+            .and_then(|boot_entry| {
+                boot_entry.image.as_ref().map(|imagestatus| {
+                    let image = imagestatus.image.image.clone();
+                    let version = imagestatus.version.as_ref().cloned().unwrap_or_default();
+                    let digest = imagestatus.image_digest.clone();
+
+                    (image, digest, version)
+                })
+            })
+            .unwrap_or_default();
+
+        let (available_image, available_version, available_digest) = hoststatus
+            .booted
+            .as_ref()
+            .and_then(|boot_entry| {
+                boot_entry.cached_update.as_ref().map(|imagestatus| {
+                    let image = imagestatus.image.image.clone();
+                    let version = imagestatus.version.as_ref().cloned().unwrap_or_default();
+                    let digest = imagestatus.image_digest.clone();
+
+                    (image, digest, version)
+                })
+            })
+            .unwrap_or_default();
+
+        Self {
+            booted_image,
+            booted_version,
+            booted_digest,
+            staged_image,
+            staged_version,
+            staged_digest,
+            rollback_image,
+            rollback_version,
+            rollback_digest,
+            available_image,
+            available_version,
+            available_digest,
+        }
+    }
+}
+
+/// Publish facts for subscription-manager consumption
+#[context("Publishing facts")]
+pub(crate) async fn publish_facts(root: &Dir) -> Result<()> {
+    let sysroot = super::cli::get_storage().await?;
+    let booted_deployment = sysroot.booted_deployment();
+    let (_deployments, host) = crate::status::get_status(&sysroot, booted_deployment.as_ref())?;
+
+    let facts = RhsmFacts::from(host.status);
+    let mut bootc_facts_file = root.open_with(
+        FACTS_PATH,
+        OpenOptions::new().write(true).create(true).truncate(true),
+    )?;
+    serde_json::to_writer_pretty(&mut bootc_facts_file, &facts)?;
+    Ok(())
+}