PT-80 Added support for slave status in pt-stalk

bin/pt-stalk

@@ -832,6 +832,8 @@ collect() {
       log "Could not find the MySQL error log"
    fi
 
+   slave_status "$d/$p-slave-status" $mysql_version
+
    if [ "${mysql_version}" '>' "5.1" ]; then
       local mutex="SHOW ENGINE INNODB MUTEX"
    else
@@ -1062,6 +1064,38 @@ tokudb_status() {
       >> "$d/$p-tokudbstatus$n" || rm -f "$d/$p-tokudbstatus$n"
 }
 
+slave_status() {
+   local outfile=$1 
+   local mysql_version=$2
+   
+   if [ "${mysql_version}" '<' "5.7" ]; then
+      echo "MySQL < 5.7 detected"
+      local status="SHOW SLAVE STATUS\G"
+      $CMD_MYSQL $EXT_ARGV -e "$status" >> $outfile
+   else                                                                                  
+      local status="
+      SELECT * 
+        FROM performance_schema.replication_connection_configuration 
+        JOIN performance_schema.replication_applier_configuration 
+       USING (channel_name)\G"
+      echo -e "\n$status\n" >> $outfile
+      $CMD_MYSQL $EXT_ARGV -e "$status" >> $outfile
+
+      local status="SELECT * 
+        FROM replication_connection_status\G"
+      echo -e "\n$status\n" >> $outfile
+      $CMD_MYSQL $EXT_ARGV -e "$status" >> $outfile
+
+      local status="SELECT * 
+        FROM replication_applier_status 
+        JOIN replication_applier_status_by_coordinator 
+       USING (channel_name)\G"
+      echo -e "\n$status\n" >> $outfile
+      $CMD_MYSQL $EXT_ARGV -e "$status" >> $outfile
+   fi
+
+}
+
 innodb_status() {
    local n=$1
 

sandbox/servers/5.7/my.sandbox.cnf

@@ -30,3 +30,5 @@ lower_case_table_names     = 0
 
 # fkc test
 binlog_format              = STATEMENT
+
+performance_schema=ON