MDEV-28758: Mariabackup copies binary logs to backup directory

This commit restores defaults and functionality regarding binlogs
to the way it was prior to MDEV-27524. The mariabackup utility no
longer saves binlogs files as part of a backup without the --galera-info
option. However, since we use --galera-info during SST, the behavior
of mariabackup changes and, in combination with GTIDs support enabled,
mariabackup transfers one (most recent) binlog file obtained after
FLUSH BINARY LOGS. In other cases, binlogs are not transferred during
SST in mariabackup mode. As for SST in the rsync mode, it works the
same way as before MDEV-27524 - by default it transfers one last
binlog file.

The --sst-max-binlogs option for mariabackup and the sst_max_binlogs
parameter in the [sst] / server sections are no longer supported for
SST via mariabackup.

4 files changed, 34 insertions, 10 deletions

diff --git a/scripts/wsrep_sst_backup.sh b/scripts/wsrep_sst_backup.sh
index 4f98ad41dd5..6f8c658135a 100644
--- a/scripts/wsrep_sst_backup.sh
+++ b/scripts/wsrep_sst_backup.sh
@@ -71,7 +71,7 @@ then
         # (b) Cluster state ID & wsrep_gtid_domain_id to be written to the file, OR
         # (c) ERROR file, in case flush tables operation failed.
 
-        while [ ! -r "$FLUSHED" ] && \
+        while [ ! -r "$FLUSHED" ] || \
                 ! grep -q -F ':' -- "$FLUSHED"
         do
             # Check whether ERROR file exists.
diff --git a/scripts/wsrep_sst_common.sh b/scripts/wsrep_sst_common.sh
index 44c6a7b4476..6a94cb0f706 100644
--- a/scripts/wsrep_sst_common.sh
+++ b/scripts/wsrep_sst_common.sh
@@ -104,6 +104,7 @@ WSREP_SST_OPT_HOST_UNESCAPED=""
 INNODB_DATA_HOME_DIR=$(trim_dir "${INNODB_DATA_HOME_DIR:-}")
 INNODB_LOG_GROUP_HOME=$(trim_dir "${INNODB_LOG_GROUP_HOME:-}")
 INNODB_UNDO_DIR=$(trim_dir "${INNODB_UNDO_DIR:-}")
+INNODB_BUFFER_POOL=""
 INNODB_FORCE_RECOVERY=""
 INNOEXTRA=""
 
@@ -212,6 +213,10 @@ case "$1" in
         readonly INNODB_UNDO_DIR=$(trim_dir "$2")
         shift
         ;;
+    '--innodb-buffer-pool-filename')
+        readonly INNODB_BUFFER_POOL=$(trim_string "$2")
+        shift
+        ;;
     '--defaults-file')
         readonly WSREP_SST_OPT_DEFAULT="$1=$2"
         readonly WSREP_SST_OPT_DEFAULTS="$1='$2'"
@@ -471,6 +476,12 @@ case "$1" in
                        fi
                        skip_mysqld_arg=1
                        ;;
+                   '--innodb-buffer-pool-filename')
+                       if [ -z "$INNODB_BUFFER_POOL" ]; then
+                           MYSQLD_OPT_INNODB_BUFFER_POOL=$(trim_string "$value")
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
                    '--innodb-force-recovery')
                        if [ -n "$value" -a "$value" != "0" ]; then
                            INNODB_FORCE_RECOVERY=$(trim_string "$value")
@@ -552,6 +563,10 @@ if [ -n "${MYSQLD_OPT_INNODB_UNDO_DIR:-}" -a \
      -z "$INNODB_UNDO_DIR" ]; then
     readonly INNODB_UNDO_DIR="$MYSQLD_OPT_INNODB_UNDO_DIR"
 fi
+if [ -n "${MYSQLD_OPT_INNODB_BUFFER_POOL:-}" -a \
+     -z "$INNODB_BUFFER_POOL" ]; then
+    readonly INNODB_BUFFER_POOL="$MYSQLD_OPT_INNODB_BUFFER_POOL"
+fi
 if [ -n "${MYSQLD_OPT_LOG_BIN:-}" -a \
      -z "$WSREP_SST_OPT_BINLOG" ]; then
     readonly WSREP_SST_OPT_BINLOG="$MYSQLD_OPT_LOG_BIN"
@@ -602,6 +617,9 @@ fi
 if [ -n "$INNODB_UNDO_DIR" ]; then
     INNOEXTRA="$INNOEXTRA --innodb-undo-directory='$INNODB_UNDO_DIR'"
 fi
+if [ -n "$INNODB_BUFFER_POOL" ]; then
+    INNOEXTRA="$INNOEXTRA --innodb-buffer-pool-filename='$INNODB_BUFFER_POOL'"
+fi
 if [ -n "$WSREP_SST_OPT_BINLOG" ]; then
     INNOEXTRA="$INNOEXTRA --log-bin='$WSREP_SST_OPT_BINLOG'"
     if [ -n "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
diff --git a/scripts/wsrep_sst_mariabackup.sh b/scripts/wsrep_sst_mariabackup.sh
index 5521dd51098..63ef8be8690 100644
--- a/scripts/wsrep_sst_mariabackup.sh
+++ b/scripts/wsrep_sst_mariabackup.sh
@@ -664,6 +664,9 @@ cleanup_at_exit()
     local estatus=$?
     if [ $estatus -ne 0 ]; then
         wsrep_log_error "Cleanup after exit with status: $estatus"
+    elif [ -z "${coords:-}" -a "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
+        estatus=32
+        wsrep_log_error "Failed to get current position"
     fi
 
     [ "$(pwd)" != "$OLD_PWD" ] && cd "$OLD_PWD"
@@ -934,6 +937,11 @@ if [ $ssyslog -eq 1 ]; then
             logger -p daemon.err -t ${ssystag}wsrep-sst-$WSREP_SST_OPT_ROLE "$@"
         }
 
+        wsrep_log_warning()
+        {
+            logger -p daemon.warning -t ${ssystag}wsrep-sst-$WSREP_SST_OPT_ROLE "$@"
+        }
+
         wsrep_log_info()
         {
             logger -p daemon.info -t ${ssystag}wsrep-sst-$WSREP_SST_OPT_ROLE "$@"
@@ -1015,7 +1023,7 @@ setup_commands()
         recovery=" --innodb-force-recovery=$INNODB_FORCE_RECOVERY"
     fi
     INNOAPPLY="$BACKUP_BIN --prepare$disver$recovery${iapts:+ }$iapts$INNOEXTRA --target-dir='$DATA' --datadir='$DATA'$mysqld_args $INNOAPPLY"
-    INNOMOVE="$BACKUP_BIN$WSREP_SST_OPT_CONF --move-back$disver${impts:+ }$impts$INNOEXTRA --force-non-empty-directories --target-dir='$DATA' --datadir='${TDATA:-$DATA}' $INNOMOVE"
+    INNOMOVE="$BACKUP_BIN$WSREP_SST_OPT_CONF --move-back$disver${impts:+ }$impts$INNOEXTRA --galera-info --force-non-empty-directories --target-dir='$DATA' --datadir='${TDATA:-$DATA}' $INNOMOVE"
     INNOBACKUP="$BACKUP_BIN$WSREP_SST_OPT_CONF --backup$disver${iopts:+ }$iopts$tmpopts$INNOEXTRA --galera-info --stream=$sfmt --target-dir='$itmpdir' --datadir='$DATA'$mysqld_args $INNOBACKUP"
 }
 
@@ -1153,11 +1161,6 @@ if [ "$WSREP_SST_OPT_ROLE" = 'donor' ]; then
             iopts="--parallel=$backup_threads${iopts:+ }$iopts"
         fi
 
-        max_binlogs=$(parse_cnf "$encgroups" 'sst-max-binlogs')
-        if [ -n "$max_binlogs" ]; then
-            iopts="--sst-max-binlogs=$max_binlogs${iopts:+ }$iopts"
-        fi
-
         setup_commands
 
         set +e
diff --git a/scripts/wsrep_sst_rsync.sh b/scripts/wsrep_sst_rsync.sh
index 7096bb4b330..ddf41559c29 100644
--- a/scripts/wsrep_sst_rsync.sh
+++ b/scripts/wsrep_sst_rsync.sh
@@ -38,6 +38,9 @@ cleanup_joiner()
     local estatus=$?
     if [ $estatus -ne 0 ]; then
         wsrep_log_error "Cleanup after exit with status: $estatus"
+    elif [ -z "${coords:-}" ]; then
+        estatus=32
+        wsrep_log_error "Failed to get current position"
     fi
 
     local failure=0
@@ -408,7 +411,7 @@ EOF
         # (b) Cluster state ID & wsrep_gtid_domain_id to be written to the file, OR
         # (c) ERROR file, in case flush tables operation failed.
 
-        while [ ! -r "$FLUSHED" ] && \
+        while [ ! -r "$FLUSHED" ] || \
                 ! grep -q -F ':' -- "$FLUSHED"
         do
             # Check whether ERROR file exists.
@@ -433,8 +436,8 @@ EOF
             # Let's check the existence of the file with the index:
             if [ -f "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
                 # Let's read the binlog index:
-                max_binlogs=$(parse_cnf "$encgroups" 'sst-max-binlogs')
-                if [ -n "$max_binlogs" ]; then
+                max_binlogs=$(parse_cnf "$encgroups" 'sst-max-binlogs' 1)
+                if [ $max_binlogs -ge 0 ]; then
                     binlog_files=""
                     if [ $max_binlogs -gt 0 ]; then
                         binlog_files=$(tail -n $max_binlogs \