Fix kernel tweaks

CHANGELOG.md

@@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 - MySQL configuration tuning
 - Cronjob to optimize MySQL databases weekly
+- wo-kernel systemd service to apply kernel tweaks on server startup
 
 #### Changed
 
@@ -19,6 +20,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Improved debug log
 - Updated Nginx configuration process to not overwrite files with custom data (htpasswd-wo, acl.conf etc..)
 
+#### Fixed
+
+- Kernel tweaks were not applied without server reboot
+
 ### v3.9.6.2 - 2019-07-24
 
 #### Changed

install

@@ -453,11 +453,12 @@ wo_upgrade_nginx() {
             fi
         else
             if [ "$wo_distro_version" == "jessie" ]; then
+                # import the respository key for updates
                 curl -sL https://download.opensuse.org/repositories/home:virtubox:WordOps/Debian_8.0/Release.key | apt-key add -
             else
                 curl -sL https://download.opensuse.org/repositories/home:virtubox:WordOps/Debian_9.0/Release.key | apt-key add -
             fi
-            # import the respository key for updates
+
         fi
 
         # stop nginx
@@ -649,6 +650,16 @@ wo_tweak_kernel() {
                 modprobe tcp_htcp && echo 'tcp_htcp' >> /etc/modules-load.d/htcp.conf
                 echo 'net.ipv4.tcp_congestion_control = htcp' >> /etc/sysctl.d/60-wo-tweaks.conf
             fi
+            # apply sysctl tweaks
+            sysctl -e -p /etc/sysctl.d/60-wo-tweaks.conf
+            if [ ! -x /opt/wo-kernel.sh ]; then
+                # download and setup wo-kernel systemd service to apply kernel tweaks for netdata and redis on server startup
+                wget -qO /opt/wo-kernel.sh https://raw.githubusercontent.com/WordOps/WordOps/updating-configuration/wo/cli/templates/wo-kernel-script.mustache
+                chmod +x /opt/wo-kernel.sh
+                wget -qO /lib/systemd/system/wo-kernel.service https://raw.githubusercontent.com/WordOps/WordOps/updating-configuration/wo/cli/templates/wo-kernel-service.mustache
+                systemctl enable wo-kernel.service
+                systemctl start wo-kernel.service
+            fi
 
         fi
         LIMIT_CHECK=$(grep "500000" /etc/security/limits.conf)

wo/cli/templates/kerneltweaks-service.mustache

@@ -1,13 +0,0 @@
-[Unit]
-Description=Linux kernel tweaks
-
-# append here other services you want netdata to wait for them to start
-After=network.target
-
-[Service]
-Type=simple
-User=root
-ExecStart=/opt/kerneltweaks.sh
-
-[Install]
-WantedBy=multi-user.target

wo/cli/templates/wo-kernel-script.mustache

@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
-# Kernel tweak script launched by kerneltweak systemd service
-# script path after installation /opt/kerneltweaks.sh
+# WordOps Kernel tweaks script
+# script path after installation /opt/wo-kernel.sh
 
+# Netdata Memory tweak
 echo 1 >/sys/kernel/mm/ksm/run
 echo 1000 >/sys/kernel/mm/ksm/sleep_millisecs
+# Redis disable transparent_hugepage
 echo never > /sys/kernel/mm/transparent_hugepage/enabled

wo/cli/templates/wo-kernel-service.mustache

@@ -0,0 +1,14 @@
+[Unit]
+Description=WordOps kernel tweaks
+# append here other services you want netdata to wait for them to start
+After=syslog.target network.target remote-fs.target nss-lookup.target
+
+[Service]
+Type=simple
+User=root
+ExecStart=/opt/wo-kernel.sh
+StandardOutput=null
+
+[Install]
+WantedBy=multi-user.target
+Alias=wo-kernel.service