Add items to monitor number of FD for squid

zabbix_conf/squid.conf

@@ -50,3 +50,33 @@ UserParameter=squid.cache_size_disk,squidclient mgr:info|grep 'Storage Swap size
 
 UserParameter=squid.cache_size_mem,squidclient mgr:info|grep 'Storage Mem size:' | awk '{print $4}'
 
+# Description: Squid FD limit
+# Type: Agent or Agent (active)
+# Key: squid.fd_max
+# Type of information: Numeric (integer 64bits)
+# Units: N/A
+# Custom multiplier: Do not use
+# Store Value: As is
+
+UserParameter=squid.max_fd,squidclient mgr:info | grep 'Maximum number of file descriptors' | cut -d':' -f2 | tr -d ' \t'
+
+# Description: Squid reserved FD
+# Type: Agent or Agent (active)
+# Key: squid.fd_reserved
+# Type of information: Numeric (integer 64bits)
+# Units: N/A
+# Custom multiplier: Do not use
+# Store Value: As is
+
+UserParameter=squid.reserved_fd,squidclient mgr:info | grep 'Reserved number of file descriptors' | cut -d':' -f2 | tr -d ' \t'
+
+# Description: Squid available FD
+# Type: Agent or Agent (active)
+# Key: squid.fd_available
+# Type of information: Numeric (integer 64bits)
+# Units: N/A
+# Custom multiplier: Do not use
+# Store Value: As is
+
+UserParameter=squid.available_fd,squidclient mgr:info | grep 'Available number of file descriptors' | cut -d':' -f2 | tr -d ' \t'
+