[OSSTEST PATCH 1/2] ts-logs-capture: Cope better with unbootable host

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

If we cannot ssh to the host to fish out its own logs, do not try to
do any of the other log captures which involve ssh'ing to the host.

This includes {fetch,extract}_logs_guest, which tolerated this
situation - so then it's an optimisation.

But it also includes shutdown_guests, which was introduced in
c5f8d41143ab "ts-logs-capture: Fish some logs out of guest filesystem"
and is not tolerant enough.  Since that commit, unbootable hosts have
caused ts-logs-capture to wrongly declare jobs broken.

Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 ts-logs-capture | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/ts-logs-capture b/ts-logs-capture
index c67856cd..7940aece 100755
--- a/ts-logs-capture
+++ b/ts-logs-capture
@@ -190,7 +190,7 @@ sub fetch_logs_host () {
             1;
         }) {
             logm("host reboot failed, abandoning log fetches: $@");
-            return;
+            return 0;
         }
        try_fetch_logs($ho, $logs);
     }
@@ -219,6 +219,8 @@ sub fetch_logs_host () {
          ) {
             try_cmd_output_save($cmd);
         }
+
+    return 1;
 }
 
 sub fetch_xenctx_guest ($) {
@@ -293,8 +295,9 @@ power_state($ho,1);
 find_guests();
 fetch_xenctx_guest($_) foreach @guests;
 serial_fetch_logs($ho);
-fetch_logs_host();
-fetch_logs_guest($_) foreach @guests;
-shutdown_guests();
-extract_logs_guest($_) foreach @allguests;
+if (fetch_logs_host()) {
+    fetch_logs_guest($_) foreach @guests;
+    shutdown_guests();
+    extract_logs_guest($_) foreach @allguests;
+}
 logm("logs captured to $stash");
-- 
2.11.0