Add a parity chunk count change test script

tests/test_parity_change.sh

@@ -0,0 +1,54 @@
+#!/bin/bash -ex
+# Test changing EC 4+1 into EC 4+3
+
+OSD_COUNT=7
+PG_COUNT=16
+SCHEME=ec
+PG_SIZE=5
+PG_DATA_SIZE=4
+PG_MINSIZE=5
+
+. `dirname $0`/run_3osds.sh
+
+try_change()
+{
+    n=$1
+    s=$2
+
+    for i in {1..10}; do
+        ($ETCDCTL get /vitastor/config/pgs --print-value-only |\
+            jq -s -e '(.[0].items["1"] | map(  ([ .osd_set[] | select(. != 0) ] | length) == '$s'  ) | length == '$n')
+                and ([ .[0].items["1"] | map(.osd_set)[][] ] | sort | unique == ["1","2","3","4","5","6","7"])') && \
+            ($ETCDCTL get --prefix /vitastor/pg/state/ --print-value-only | jq -s -e '([ .[] | select(.state == ["active"]) ] | length) == '$n'') && \
+            break
+        sleep 1
+    done
+
+    if ! ($ETCDCTL get /vitastor/config/pgs --print-value-only |\
+        jq -s -e '(.[0].items["1"] | map(  ([ .osd_set[] | select(. != 0) ] | length) == '$s'  ) | length == '$n')
+            and ([ .[0].items["1"] | map(.osd_set)[][] ] | sort | unique == ["1","2","3","4","5","6","7"])'); then
+        $ETCDCTL get /vitastor/config/pgs
+        $ETCDCTL get --prefix /vitastor/pg/state/
+        format_error "FAILED: PG SIZE NOT CHANGED OR SOME OSDS DO NOT HAVE PGS"
+    fi
+
+    if ! ($ETCDCTL get --prefix /vitastor/pg/state/ --print-value-only | jq -s -e '([ .[] | select(.state == ["active"]) ] | length) == '$n); then
+        $ETCDCTL get /vitastor/config/pgs
+        $ETCDCTL get --prefix /vitastor/pg/state/
+        format_error "FAILED: PGS NOT UP AFTER PG SIZE CHANGE"
+    fi
+}
+
+LD_PRELOAD="build/src/libfio_vitastor.so" \
+    fio -thread -name=test -ioengine=build/src/libfio_vitastor.so -bs=1M -direct=1 -iodepth=4 \
+        -rw=write -etcd=$ETCD_URL -pool=1 -inode=1 -size=128M -runtime=10
+
+PG_SIZE=7
+POOLCFG='"name":"testpool","failure_domain":"osd","scheme":"ec","parity_chunks":'$((PG_SIZE-PG_DATA_SIZE))
+$ETCDCTL put /vitastor/config/pools '{"1":{'$POOLCFG',"pg_size":'$PG_SIZE',"pg_minsize":'$PG_MINSIZE',"pg_count":'$PG_COUNT'}}'
+
+sleep 2
+
+try_change 16 7
+
+format_green OK