Add new mysql checks

+ add buffer_pool_size check
+ Added FD check

Change-Id: If66a1b333b9eaa15883957800030c07da5fd08c9

ansible/check/group_vars/controller

@@ -4,6 +4,7 @@ tuned_profile: throughput-performance
 rabbitmq_fd: 1600
 haproxy_max_connections: 4096
 mariadb_max_connections: 4096
+mysqld_soft_fd: 16384
 nova_vif_timeout: 300
 netdev_max_backlog: 100000
 
@@ -20,6 +21,12 @@ checks :
     bz1266253 :
         url: "https://bugzilla.redhat.com/show_bug.cgi?id=1266253"
         name: "increase mariadb max_connection default value"
+    buffer_pool_size:
+        url: "none"
+        name: "mariadb buffer pool size tuning"
+    mysqld_safe_soft_fd:
+        url: "none"
+        name: "mariadb file descriptor setting not high enough"
     bz1293712 :
         url: "https://bugzilla.redhat.com/show_bug.cgi?id=1293712"
         name: "/etc/udev/rules.d/99-dhcp-all-interfaces.rules causes a slow and miserable degradation until things fail"

ansible/check/roles/controller/tasks/main.yml

@@ -10,6 +10,26 @@
   failed_when: bz1266253.stdout|int < mariadb_max_connections
   ignore_errors: yes
 
+- name: Suggested buffer_pool_size
+  shell: mysql -Bse "SELECT CEILING(Total_InnoDB_Bytes*1.6/POWER(1024,2)) RIBPS FROM (SELECT SUM(data_length+index_length) Total_InnoDB_Bytes FROM information_schema.tables WHERE engine='InnoDB') A;"
+  register: suggested_buffer_pool_size
+  changed_when: no
+  ignore_errors: yes
+
+- name : Current buffer_pool_size
+  shell: echo $(mysql -Bse " select @@innodb_buffer_pool_size")/1024/1024 | bc
+  register: buffer_pool_size
+  failed_when: buffer_pool_size.stdout|int < suggested_buffer_pool_size.stdout|int
+  changed_when: no
+  ignore_errors: yes
+
+- name : File descriptors for the mysql process
+  shell: cat /proc/$(pgrep mysqld_safe)/limits | grep "open files" | awk '{print $4}'
+  register: mysqld_safe_soft_fd
+  failed_when: mysqld_safe_soft_fd.stdout|int < mysqld_soft_fd
+  changed_when: no
+  ignore_errors: yes
+
 - name : Check rabbitmq file descriptors
   shell: rabbitmqctl status | grep file_descriptors | awk -F',' '{print $3}' | sed 's/.$//'
   register: bz1282491