Merge pull request #66 from lucab/ups/rpm-ostree-deploy-metrics

rpm_ostree/deploy: record metrics

src/rpm_ostree/cli_deploy.rs

@@ -2,9 +2,22 @@
 
 use super::Release;
 use failure::{bail, format_err, Fallible, ResultExt};
+use prometheus::IntCounter;
+
+lazy_static::lazy_static! {
+    static ref DEPLOY_ATTEMPTS: IntCounter = register_int_counter!(opts!(
+        "zincati_rpm_ostree_deploy_attempts_total",
+        "Total number of 'rpm-ostree deploy' attempts."
+    )).unwrap();
+    static ref DEPLOY_FAILURES: IntCounter = register_int_counter!(opts!(
+        "zincati_rpm_ostree_deploy_failures_total",
+        "Total number of 'rpm-ostree deploy' failures."
+    )).unwrap();
+}
 
 /// Deploy an upgrade (by checksum) and leave the new deployment locked.
 pub fn deploy_locked(release: Release) -> Fallible<Release> {
+    DEPLOY_ATTEMPTS.inc();
     let cmd = std::process::Command::new("rpm-ostree")
         .arg("deploy")
         .arg("--lock-finalization")
@@ -13,8 +26,9 @@ pub fn deploy_locked(release: Release) -> Fallible<Release> {
         .with_context(|e| format_err!("failed to run rpm-ostree: {}", e))?;
 
     if !cmd.status.success() {
+        DEPLOY_FAILURES.inc();
         bail!(
-            "rpm-ostree upgrade failed:\n{}",
+            "rpm-ostree deploy failed:\n{}",
             String::from_utf8_lossy(&cmd.stderr)
         );
     }