added mysql

diff --git a/charts.d/mysql.chart.sh b/charts.d/mysql.chart.sh
new file mode 100755 (executable)
index 0000000..75907b0
--- /dev/null
+++ b/charts.d/mysql.chart.sh
@@ -0,0 +1,153 @@
+#!/bin/sh
+
+# http://dev.mysql.com/doc/refman/5.0/en/server-status-variables.html
+
+mysql_cmd_opts=""
+mysql_update_every=5
+
+mysql_get_stats() {
+       mysql "${mysql_cmd_opts}" -s -e "show global status;"
+}
+
+mysql_check() {
+       # check once if the url works
+       local x="$(mysql_get_stats | grep "^Connections[[:space:]]")"
+       if [ ! $? -eq 0 -o -z "$x" ]
+       then
+               echo >&2 "mysql: cannot get global status. Please set mysql_cmd_opts='options' whatever needed to get connected to mysql server, in $confd/mysql.conf"
+               return 1
+       fi
+
+       return 0
+}
+
+mysql_create() {
+       # create the charts
+       cat <<EOF
+CHART mysql.bandwidth '' "mysql Bandwidth" "kilobits / sec" mysql '' area 20001 $mysql_update_every
+DIMENSION Bytes_received in incremental 8 $((1024 * mysql_update_every))
+DIMENSION Bytes_sent out incremental -8 $((1024 * mysql_update_every))
+
+CHART mysql.queries '' "mysql Queries" "queries / sec" mysql '' line 20002 $mysql_update_every
+DIMENSION Queries queries incremental 1 $((1 * mysql_update_every))
+DIMENSION Questions questions incremental 1 $((1 * mysql_update_every))
+DIMENSION Slow_queries slow_queries incremental -1 $((1 * mysql_update_every))
+
+CHART mysql.operations '' "mysql Operations" "operations / sec" mysql '' line 20003 $mysql_update_every
+DIMENSION Opened_tables opened_table incremental 1 $((1 * mysql_update_every))
+DIMENSION Flush_commands flush incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_commit commit incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_delete delete incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_prepare prepare incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_read_first read_first incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_read_key read_key incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_read_next read_next incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_read_prev read_prev incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_read_rnd read_rnd incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_read_rnd_next read_rnd_next incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_rollback rollback incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_savepoint savepoint incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_savepoint_rollback savepoint_rollback incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_update update incremental 1 $((1 * mysql_update_every))
+DIMENSION Handler_write write incremental 1 $((1 * mysql_update_every))
+
+CHART mysql.table_locks '' "mysql Tables Locks" "locks / sec" mysql '' line 20004 $mysql_update_every
+DIMENSION Table_locks_immediate immediate incremental 1 $((1 * mysql_update_every))
+DIMENSION Table_locks_waited waited incremental -1 $((1 * mysql_update_every))
+
+CHART mysql.select_issues '' "mysql Select Issues" "issues / sec" mysql '' line 20005 $mysql_update_every
+DIMENSION Select_full_join full_join incremental 1 $((1 * mysql_update_every))
+DIMENSION Select_full_range_join full_range_join incremental 1 $((1 * mysql_update_every))
+DIMENSION Select_range range incremental 1 $((1 * mysql_update_every))
+DIMENSION Select_range_check range_check incremental 1 $((1 * mysql_update_every))
+DIMENSION Select_scan scan incremental 1 $((1 * mysql_update_every))
+
+CHART mysql.sort_issues '' "mysql Sort Issues" "issues / sec" mysql '' line 20006 $mysql_update_every
+DIMENSION Sort_merge_passes merge_passes incremental 1 $((1 * mysql_update_every))
+DIMENSION Sort_range range incremental 1 $((1 * mysql_update_every))
+DIMENSION Sort_scan scan incremental 1 $((1 * mysql_update_every))
+EOF
+       
+       return 0
+}
+
+
+mysql_update() {
+       # the first argument to this function is the microseconds since last update
+       # pass this parameter to the BEGIN statement (see bellow).
+
+       # do all the work to collect / calculate the values
+       # for each dimension
+       # remember: KEEP IT SIMPLE AND SHORT
+
+       # 1. get the counters page from mysql
+       # 2. sed to remove spaces; replace . with _; remove spaces around =; prepend each line with: local mysql_
+       # 3. egrep lines starting with:
+       #    local mysql_client_http_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
+       #    local mysql_server_all_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
+       # 4. then execute this as a script with the eval
+       #
+       # be very carefull with eval:
+       # prepare the script and always grep at the end the lines that are usefull, so that
+       # even if something goes wrong, no other code can be executed
+
+       eval "$(mysql_get_stats |\
+                sed -e "s/[[:space:]]\+/ /g" -e "s/\./_/g" -e "s/^\([a-z0-9_]\+\)[[:space:]]\+\([0-9]\+\)$/local mysql_\1=\2/g" |\
+                egrep "^local mysql_[a-zA-Z0-9_]+=[[:digit:]]+$")"
+
+       # write the result of the work.
+       cat <<VALUESEOF
+BEGIN mysql.bandwidth $1
+SET Bytes_received = $mysql_Bytes_received
+SET Bytes_sent = $mysql_Bytes_sent
+END
+
+BEGIN mysql.queries $1
+SET Queries = $mysql_Queries
+SET Questions = $mysql_Questions
+SET Slow_queries = $mysql_Slow_queries
+END
+
+BEGIN mysql.operations $1
+SET Opened_tables = $mysql_Opened_tables
+SET Flush_commands = $mysql_Flush_commands
+SET Handler_commit = $mysql_Handler_commit
+SET Handler_delete = $mysql_Handler_delete
+SET Handler_prepare = $mysql_Handler_prepare
+SET Handler_read_first = $mysql_Handler_read_first
+SET Handler_read_key = $mysql_Handler_read_key
+SET Handler_read_next = $mysql_Handler_read_next
+SET Handler_read_prev = $mysql_Handler_read_prev
+SET Handler_read_rnd = $mysql_Handler_read_rnd
+SET Handler_read_rnd_next = $mysql_Handler_read_rnd_next
+SET Handler_rollback = $mysql_Handler_rollback
+SET Handler_savepoint = $mysql_Handler_savepoint
+SET Handler_savepoint_rollback = $mysql_Handler_savepoint_rollback
+SET Handler_update = $mysql_Handler_update
+SET Handler_write = $mysql_Handler_write
+END
+
+BEGIN mysql.table_locks $1
+SET Table_locks_immediate = $mysql_Table_locks_immediate
+SET Table_locks_waited = $mysql_Table_locks_waited
+END
+
+BEGIN mysql.select_issues $1
+SET Select_full_join = $mysql_Select_full_join
+SET Select_full_range_join = $mysql_Select_full_range_join
+SET Select_range = $mysql_Select_range
+SET Select_range_check = $mysql_Select_range_check
+SET Select_scan = $mysql_Select_scan
+END
+
+BEGIN mysql.sort_issues $1
+SET Sort_merge_passes = $mysql_Sort_merge_passes
+SET Sort_range = $mysql_Sort_range
+SET Sort_scan = $mysql_Sort_scan
+END
+
+VALUESEOF
+
+       return 0
+}
+