From 21270e0b4250bd6927e85227fa825cf8ed59aaed Mon Sep 17 00:00:00 2001
From: Fabian Mastenbroek <mail.fabianm@gmail.com>
Date: Thu, 22 Sep 2022 10:55:13 +0200
Subject: refactor(compute): Add separate error host state

This change adds a new HostState to indicate that the host is in an
error state as opposed to being purposefully unavailable.
---
 .../kotlin/org/opendc/compute/service/driver/HostState.kt     | 11 ++++++++---
 .../org/opendc/compute/service/internal/ComputeServiceImpl.kt |  2 +-
 2 files changed, 9 insertions(+), 4 deletions(-)

(limited to 'opendc-compute/opendc-compute-service/src')

diff --git a/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/driver/HostState.kt b/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/driver/HostState.kt
index 6d85ee2d..ca6c625c 100644
--- a/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/driver/HostState.kt
+++ b/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/driver/HostState.kt
@@ -27,12 +27,17 @@ package org.opendc.compute.service.driver
  */
 public enum class HostState {
     /**
-     * The host is up.
+     * The host is up and able to host guests.
      */
     UP,
 
     /**
-     * The host is down.
+     * The host is in a (forced) down state and unable to host any guests.
      */
-    DOWN
+    DOWN,
+
+    /**
+     * The host is in an error state and unable to host any guests.
+     */
+    ERROR,
 }
diff --git a/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/internal/ComputeServiceImpl.kt b/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/internal/ComputeServiceImpl.kt
index 21aaa19e..52ee780b 100644
--- a/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/internal/ComputeServiceImpl.kt
+++ b/opendc-compute/opendc-compute-service/src/main/kotlin/org/opendc/compute/service/internal/ComputeServiceImpl.kt
@@ -411,7 +411,7 @@ internal class ComputeServiceImpl(
                 // Re-schedule on the new machine
                 requestSchedulingCycle()
             }
-            HostState.DOWN -> {
+            else -> {
                 logger.debug { "[${clock.instant()}] Host ${host.uid} state changed: $newState" }
 
                 val hv = hostToView[host] ?: return
-- 
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