core/timer: in containers OnBootSec should count from container startup

In Fedora dnf-makecache.timer specifies OnBootSec=10min, but it fired
during boot in systemd-nspawn, because the clock ticks since the host's
boot.

Fix it by treating OnBootSec the same as OnStartupSec when running in
a container.

1 files changed, 9 insertions, 4 deletions

diff --git a/src/core/timer.c b/src/core/timer.c
index cc2afedabf..c9dc97d4fb 100644
--- a/src/core/timer.c
+++ b/src/core/timer.c
@@ -34,6 +34,7 @@
 #include "unit-name.h"
 #include "unit.h"
 #include "user-util.h"
+#include "virt.h"
 
 static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
         [TIMER_DEAD] = UNIT_INACTIVE,
@@ -359,10 +360,14 @@ static void timer_enter_waiting(Timer *t, bool initial) {
                                 break;
 
                         case TIMER_BOOT:
-                                /* CLOCK_MONOTONIC equals the uptime on Linux */
-                                base = 0;
-                                break;
-
+                                if (detect_container() <= 0) {
+                                        /* CLOCK_MONOTONIC equals the uptime on Linux */
+                                        base = 0;
+                                        break;
+                                }
+                                /* In a container we don't want to include the time the host
+                                 * was already up when the container started, so count from
+                                 * our own startup. Fall through. */
                         case TIMER_STARTUP:
                                 base = UNIT(t)->manager->userspace_timestamp.monotonic;
                                 break;