add bin/server-checklist.sh

bin/server-checklist.sh

@@ -0,0 +1,102 @@
+#!/usr/bin/env bash
+# Description:	Check and print server system parameters
+# Licence:      BSD
+# Author:       Lesovsky Alexey, lesovsky@gmail.com
+
+export PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
+red=$(tput setaf 1)
+green=$(tput setaf 2)
+yellow=$(tput setaf 3)
+reset=$(tput sgr0)
+
+main() {
+echo "${yellow}Tuning target: CPU scheduler${reset}"
+sysctl -e kernel.sched_migration_cost_ns kernel.sched_migration_cost kernel.sched_autogroup_enabled
+
+echo "${yellow}Tuning target: Virtual memory and NUMA${reset}"
+echo "$(grep -E "^(Mem|Swap)Total:" /proc/meminfo)"
+sysctl -e vm.dirty_background_bytes vm.dirty_bytes vm.dirty_background_ratio vm.dirty_ratio vm.dirty_expire_centisecs vm.swappiness vm.overcommit_memory vm.overcommit_ratio vm.min_free_kbytes
+
+echo "NUMA node(s) available: $(ls -1d /sys/devices/system/node/node* |wc -l)"
+sysctl -e vm.zone_reclaim_mode kernel.numa_balancing
+
+echo "${yellow}Tuning target: Huge pages${reset}"
+echo "/sys/kernel/mm/transparent_hugepage/enabled: $(cat /sys/kernel/mm/transparent_hugepage/enabled)
+/sys/kernel/mm/transparent_hugepage/defrag: $(cat /sys/kernel/mm/transparent_hugepage/defrag)"
+sysctl -e vm.hugetlb_shm_group vm.hugepages_treat_as_movable vm.nr_hugepages vm.nr_overcommit_hugepages
+
+echo "${yellow}Tuning target: File systems${reset}"
+mount |grep -w -E 'ext(3|4)|reiserfs|xfs|rootfs' |column -t
+
+echo "${yellow}Tuning target: Storage IO${reset}"
+if [ -d /sys/block/ ]
+  then
+    for i in $(ls -1 /sys/block/ | grep -oE 'sd[a-z]');
+      do
+        echo "$i: rotational: $(cat /sys/block/$i/queue/rotational); \
+        scheduler: $(cat /sys/block/$i/queue/scheduler); \
+        nr_requests: $(cat /sys/block/$i/queue/nr_requests); \
+        rq_affinity: $(cat /sys/block/$i/queue/rq_affinity); \
+        read_ahead_kb: $(cat /sys/block/$i/queue/read_ahead_kb)";
+      done #| awk '!(NR%2){print p "\t\t\t" $0}{p=$0}'
+    else
+      echo "/sys/block directory not found."
+fi
+
+echo "${yellow}Tuning target: Networking${reset}"
+sysctl -e net.ipv4.ip_local_port_range net.core.busy_poll net.core.busy_read net.ipv4.tcp_fastopen net.core.somaxconn net.core.netdev_max_backlog net.core.rmem_max net.core.wmem_max net.ipv4.tcp_rmem net.ipv4.tcp_wmem net.ipv4.tcp_max_syn_backlog net.ipv4.tcp_slow_start_after_idle net.ipv4.tcp_tw_reuse net.ipv4.tcp_abort_on_overflow
+
+echo "${yellow}Tuning target: OS limits${reset}"
+sysctl -e fs.file-max fs.inotify.max_user_watches
+echo "open files limit (ulimit -n): $(ulimit -n)"
+
+echo "${yellow}Tuning target: Clocksource${reset}"
+echo "/sys/devices/system/clocksource/clocksource0/available_clocksource: $(cat /sys/devices/system/clocksource/clocksource0/available_clocksource)
+/sys/devices/system/clocksource/clocksource0/current_clocksource: $(cat /sys/devices/system/clocksource/clocksource0/current_clocksource)"
+
+echo "${yellow}Tuning target: Power saving policy${reset}"
+sysctl -e vm.laptop_mode
+if [ -d /sys/devices/system/cpu/cpu0/cpufreq/ ]
+  then
+    echo "current kernel version: $(uname -r)"
+    for i in $(ls -1 /sys/devices/system/cpu/ | grep -oE 'cpu[0-9]+');
+      do
+        echo "$i: $(cat /sys/devices/system/cpu/$i/cpufreq/scaling_governor) (driver: $(cat /sys/devices/system/cpu/$i/cpufreq/scaling_driver))";
+      done | awk '!(NR%2){print p "\t\t\t" $0}{p=$0}'
+    else
+      echo "cpufreq directory not found, invoke lscpu: "
+      lscpu |grep -E '^(Model|Vendor|CPU( min| max)? MHz)'
+fi
+
+echo "${yellow}Tuning target: Services${reset}"
+if which ntpd &>/dev/null
+  then 
+    if [[ $(ps ho comm -C ntpd) == *ntpd* ]]
+       then echo "1. Ntpd found and running."
+       else echo "1. Ntpd found, but not running."
+    fi
+  else echo "1. Ntpd not found."
+fi
+
+if pgrep pgbouncer &>/dev/null
+  then
+    echo "2. Pgbouncer"
+      for i in $(pgrep pgbouncer); do 
+        echo "  pid: $i open files limit: $(awk '/Max open files/{print "soft: " $4 " hard: " $5}' /proc/$i/limits)"
+      done
+  else echo "2. Pgbouncer not running, skip."
+fi
+
+echo "${yellow}Tuning target: Miscellaneous${reset}"
+if [[ $(lsmod |grep edac) ]]
+  then
+    echo "1. Error Detection and Correction Module (EDAC)."
+    for i in $(ls /sys/devices/system/edac/mc/mc*/*e_count);
+      do echo "$i - $(cat $i)";
+    done
+  else
+    echo "1. Error Detection and Correction Module (EDAC) modules not loaded"
+fi
+}
+
+main