Release 0.5.11

Another bunch of fixes, including important ones. Now OSDs are stable in SSD+HDD
configurations and everything is mostly ready for the merge of master branch.

Features:

- Add min_flusher_count configuration (good for HDDs)
- Shuffle PGs for better data device utilisation
- Make OSDs benefit from the immediate_commit=small setting if it's applicable

Bug fixes:

- Rework client code to fix write ordering during operation replay
- Rework error handling code so OSDs don't crash in reaction to a crash of their peer OSDs
- Fix several block layer problems related to the journal, some of which
  were leading to double allocations of the same block during journal replay
- Fix monitors crashing during the removal of OSD keys from etcd
- Fix data fsyncs being incorrectly disabled when only disable_journal_fsync was set
- Always zero out unused part of request/reply headers
- Fix some theoretically possible read/write ordering issues
- Don't try to "recover" misplaced objects if it would make them degraded
- Fix heartbeats sometimes preventing OSD to establish connections

debian/changelog

@@ -1,4 +1,4 @@
-vitastor (0.5.10-1) unstable; urgency=medium
+vitastor (0.5.11-1) unstable; urgency=medium
 
   * Bugfixes
 

debian/vitastor.Dockerfile

@@ -40,10 +40,10 @@ RUN set -e -x; \
     mkdir -p /root/packages/vitastor-$REL; \
     rm -rf /root/packages/vitastor-$REL/*; \
     cd /root/packages/vitastor-$REL; \
-    cp -r /root/vitastor vitastor-0.5.10; \
-    ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.5.10/qemu; \
-    ln -s /root/fio-build/fio-*/ vitastor-0.5.10/fio; \
-    cd vitastor-0.5.10; \
+    cp -r /root/vitastor vitastor-0.5.11; \
+    ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.5.11/qemu; \
+    ln -s /root/fio-build/fio-*/ vitastor-0.5.11/fio; \
+    cd vitastor-0.5.11; \
     FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
     QEMU=$(head -n1 qemu/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
     sh copy-qemu-includes.sh; \
@@ -59,8 +59,8 @@ RUN set -e -x; \
     echo "dep:fio=$FIO" > debian/substvars; \
     echo "dep:qemu=$QEMU" >> debian/substvars; \
     cd /root/packages/vitastor-$REL; \
-    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.5.10.orig.tar.xz vitastor-0.5.10; \
-    cd vitastor-0.5.10; \
+    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.5.11.orig.tar.xz vitastor-0.5.11; \
+    cd vitastor-0.5.11; \
     V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
     DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v "$V""$REL" "Rebuild for $REL"; \
     DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \