Add multi-dump.sh

This is a debug tool that can dump out Ceph information at various
epochs. For instance, it can show how the OSDmap changed over time.

Signed-off-by: Colin McCabe <colinm@hq.newdream.net>

diff --git a/src/multi-dump.sh b/src/multi-dump.sh
new file mode 100755 (executable)
index 0000000..f3cf67e
--- /dev/null
+++ b/src/multi-dump.sh
@@ -0,0 +1,79 @@
+#!/bin/bash
+
+#
+# multi-dump.sh
+#
+# Dumps interesting information about the Ceph cluster at a series of epochs.
+#
+
+### Functions
+usage() {
+        echo <<EOF
+multi-dump.sh: dumps out ceph maps
+
+-e <start-epoch>           What epoch to end with.
+-h                         This help message
+-s <start-epoch>           What epoch to start with. Defaults to 1.
+-t <osdmap>                What type of map to dump. Defaults to osdmap.
+EOF
+}
+
+cleanup() {
+        [ -n ${TEMPDIR} ] && rm -rf "${TEMPDIR}"
+}
+
+die() {
+        echo $@
+        exit 1
+}
+
+dump_osdmap() {
+        for v in `seq $START_EPOCH $END_EPOCH`; do
+                ./ceph osd getmap $v -o $TEMPDIR/$v >> $TEMPDIR/cephtool-out \
+                        || die "cephtool failed to dump epoch $v"
+        done
+        for v in `seq $START_EPOCH $END_EPOCH`; do
+                echo "************** $v **************"
+                ./osdmaptool --print $TEMPDIR/$v \
+                        || die "osdmaptool failed to print epoch $v"
+        done
+}
+
+### Setup
+trap cleanup INT TERM EXIT
+TEMPDIR=`mktemp -d`
+MYDIR=`dirname $0`
+MYDIR=`readlink -f $MYDIR`
+MAP_TYPE=osdmap
+cd $MYDIR
+
+### Parse arguments
+START_EPOCH=1
+END_EPOCH=0
+
+while getopts  "e:hs:t:" flag; do
+case $flag in
+        e) END_EPOCH=$OPTARG;;
+
+        h)  usage
+            exit 0
+            ;;
+
+        s) START_EPOCH=$OPTARG;;
+
+        t) MAP_TYPE=$OPTARG;;
+
+        *) usage
+           exit 1;;
+esac
+done
+[ $END_EPOCH -eq 0 ] && die "You must supply an end epoch with -e"
+
+### Dump maps
+case $MAP_TYPE in
+        "osdmap") dump_osdmap;;
+
+        *) die "sorry, don't know how to handle MAP_TYPE '$MAP_TYPE'"
+esac
+
+exit 0