[Xen-devel] [OSSTEST PATCH 15/13] Plan reporting: Provide get-last-plan queuedaemon command

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

This allows retrieval, by monitoring clients which are not
participating in the planning queue, of the finished projection, or
the unfinished plan as it was at the time of last restart.

Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---
 README.planner |   11 +++++++++++
 ms-queuedaemon |    8 ++++++++
 2 files changed, 19 insertions(+)

diff --git a/README.planner b/README.planner
index c1b2bf6..8231812 100644
--- a/README.planner
+++ b/README.planner
@@ -224,6 +224,17 @@ ms-queuedaemon commands
 
        > thought-done | thought-wait
 
+        > get-last-plan projection|plan
+                Retrieve the last fully completed plan (`projection'),
+               or the most recent short-term information used for
+               actual resource allocation (`plan').
+
+               For monitoring tools, not participants in the resource
+               allocation process.  Response is as for get-plan:
+
+               < OK get-plan BYTES
+               PLAN-DATA
+
 
 Plan is:
        Start   time_t used for "now" *
diff --git a/ms-queuedaemon b/ms-queuedaemon
index 222b687..97dff85 100755
--- a/ms-queuedaemon
+++ b/ms-queuedaemon
@@ -292,6 +292,7 @@ proc report-plan {w wo} {
     } emsg]} {
         log "INTERNAL ERROR showing $w html: $emsg"
     } else {
+       file copy -force data-$w.pl data-$wo-final.pl
         log "$w report-plan OK"
     }
 }
@@ -366,6 +367,13 @@ proc cmd/get-plan {chan desc} {
     set plan [return-plan-to-client $chan $w]
 }
 
+proc cmd/get-last-plan {chan desc w} {
+    global walkers
+    if {[lsearch -exact $walkers $w] < 0} { error "unknown last-plan ($w)" }
+    if {![file exists data-$w-final.pl]} { error "no last-plan $w" }
+    return-plan-data-to-client $w-final
+}
+
 proc cmd/book-resources {chan desc bytes} {
     read-chan-data $chan $bytes do-book-resources $w
 }
-- 
1.7.10.4


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