add --[no-]mysql-summary to execute pt-mysql-summary(1) if present

CHANGELOG

@@ -12,6 +12,8 @@ The **patch** part changes is incremented if multiple releases happen the same m
 
 ### Added
 
+* add `--[no-]mysql-summary` to execute `pt-mysql-summary(1)` if present
+
 ### Changed
 
 ### Fixed

dump-server-state.sh

@@ -64,14 +64,15 @@ Tasks options
  --[no-]mount           copy of mount points (default: yes)
  --[no-]df              copy of disk usage (default: yes)
  --[no-]dmesg           copy of dmesg (default: yes)
- --[no-]mysql          copy of mysql processes (default: yes)
+ --[no-]mysql-processes copy of mysql processes (default: yes)
+ --[no-]mysql-summary   copy of mysql summary (default: yes)
  --[no-]systemctl       copy of systemd services states (default: yes)
 
 Tasks options order matters. They are evaluated from left to right.
 Examples :
 * "[…] --none --uname" will do only the uname task
 * "[…] --all --no-etc" will do everything but the etc task
-* "[…] --etc --none --mysql" will do only the mysql task
+* "[…] --etc --none --mysql-summary" will do only the mysql task
 END
 }
 debug() {
@@ -741,6 +742,38 @@ task_mysql_processes() {
     fi
 }
 
+task_mysql_summary() {
+    debug "Task: MySQL summary"
+
+    mysqladmin_bin=$(command -v mysqladmin)
+    pt_mysql_summary_bin=$(command -v pt-mysql-summary)
+
+    if [ -n "${mysqladmin_bin}" ] && [ -n "${pt_mysql_summary_bin}" ]; then
+        # Look for local MySQL or MariaDB process
+        if pgrep mysqld > /dev/null || pgrep mariadbd > /dev/null; then
+            if ${mysqladmin_bin} ping > /dev/null 2>&1; then
+                ${pt_mysql_summary_bin} > "${dump_dir}/mysql-summary.txt" 2> "${dump_dir}/mysql-summary.err"
+                last_rc=$?
+
+                if [ ${last_rc} -eq 0 ]; then
+                    debug "* pt-mysql-summary OK"
+                else
+                    debug "* pt-mysql-summary ERROR"
+                    debug < "${dump_dir}/mysql-summary.err"
+                    rm "${dump_dir}/mysql-summary.err"
+                    rc=10
+                fi
+            else
+                debug "* unable to ping with mysqladmin"
+            fi
+        else
+            debug "* no mysqld or mariadbd process is running"
+        fi
+    else
+        debug "* pt-mysql-summary not found"
+    fi
+}
+
 task_systemctl() {
     debug "Task: Systemd services"
 
@@ -841,6 +874,9 @@ main() {
     if [ "${TASK_MYSQL_PROCESSES}" -eq 1 ]; then
         task_mysql_processes
     fi
+    if [ "${TASK_MYSQL_SUMMARY}" -eq 1 ]; then
+        task_mysql_summary
+    fi
     if [ "${TASK_SYSTEMCTL}" -eq 1 ]; then
         task_systemctl
     fi
@@ -950,6 +986,7 @@ while :; do
                 TASK_DF \
                 TASK_DMESG \
                 TASK_MYSQL_PROCESSES \
+                TASK_MYSQL_SUMMARY \
                 TASK_SYSTEMCTL
             do
                 eval "${option}=1"
@@ -978,6 +1015,7 @@ while :; do
                 TASK_DF \
                 TASK_DMESG \
                 TASK_MYSQL_PROCESSES \
+                TASK_MYSQL_SUMMARY \
                 TASK_SYSTEMCTL
             do
                 eval "${option}=0"
@@ -1124,6 +1162,13 @@ while :; do
             TASK_MYSQL_PROCESSES=0
             ;;
 
+        --mysql-summary)
+            TASK_MYSQL_SUMMARY=1
+            ;;
+        --no-mysql-summary)
+            TASK_MYSQL_SUMMARY=0
+            ;;
+
         --systemctl)
             TASK_SYSTEMCTL=1
             ;;
@@ -1173,6 +1218,7 @@ done
 : "${TASK_DF:=1}"
 : "${TASK_DMESG:=1}"
 : "${TASK_MYSQL_PROCESSES:=1}"
+: "${TASK_MYSQL_SUMMARY:=1}"
 : "${TASK_SYSTEMCTL:=1}"
 
 export LC_ALL=C