Merge "Add Gentoo Linux support to utility and setup scripts" from Al…

…exys

"These patches add support to setup and operate ScyllaDB on Gentoo Linux.

 * scylla_setup and related scripts
 * node_health_check

 I have kept them as simple as possible and tested them to setup and operate
 succesfully a three nodes cluster running on Gentoo Linux."

* 'gentoo_linux_support' of github.com:ultrabug/scylla:
  scylla_setup: add gentoo linux installation detection
  prometheus node_exporter install: add support for gentoo linux
  raid setup: add support for gentoo linux
  ntp setup: add support for gentoo linux
  kernel check: add support for gentoo linux
  cpuscaling setup: add support for gentoo linux
  coredump setup: add support for gentoo linux
  detect gentoo linux on selinux setup
  add gentoo_variant detection and SYSCONFIG setup

dist/common/scripts/node_exporter_install

@@ -22,26 +22,37 @@ if [ "`id -u`" -ne 0 ]; then
     exit 1
 fi
 
-if [ -f /usr/bin/node_exporter ]; then
+if [ -f /usr/bin/node_exporter ] || [ -f /usr/bin/prometheus-node_exporter ]; then
     echo "node_exporter already installed"
     exit 1
 fi
 
-version=0.12.0
-dir=/usr/lib/scylla/Prometheus/node_exporter
-mkdir -p $dir
-cd $dir
-curl -L https://github.com/prometheus/node_exporter/releases/download/$version/node_exporter-$version.linux-amd64.tar.gz -o $dir/node_exporter-$version.linux-amd64.tar.gz
-tar -xvzf $dir/node_exporter-$version.linux-amd64.tar.gz
-rm $dir/node_exporter-$version.linux-amd64.tar.gz
-ln -s $dir/node_exporter-$version.linux-amd64/node_exporter /usr/bin
-. /etc/os-release
-
- if [ "$(cat /proc/1/comm)" = "systemd" ]; then
-    systemctl enable node-exporter
-    systemctl start node-exporter
+. /usr/lib/scylla/scylla_lib.sh
+
+if is_gentoo_variant; then
+    emerge -uq net-analyzer/prometheus-node_exporter
+    if is_systemd; then
+       echo "net-analyzer/prometheus-node_exporter does not install systemd service files, please fill a bug if you need them."
+    else
+        rc-update add prometheus-node_exporter default
+        service prometheus-node_exporter start
+    fi
 else
-    cat <<EOT >> /etc/init/node_exporter.conf
+    version=0.12.0
+    dir=/usr/lib/scylla/Prometheus/node_exporter
+    mkdir -p $dir
+    cd $dir
+    curl -L https://github.com/prometheus/node_exporter/releases/download/$version/node_exporter-$version.linux-amd64.tar.gz -o $dir/node_exporter-$version.linux-amd64.tar.gz
+    tar -xvzf $dir/node_exporter-$version.linux-amd64.tar.gz
+    rm $dir/node_exporter-$version.linux-amd64.tar.gz
+    ln -s $dir/node_exporter-$version.linux-amd64/node_exporter /usr/bin
+    . /etc/os-release
+
+     if is_systemd; then
+        systemctl enable node-exporter
+        systemctl start node-exporter
+    else
+        cat <<EOT >> /etc/init/node_exporter.conf
 # Run node_exporter
 
 start on startup
@@ -50,7 +61,8 @@ script
    /usr/bin/node_exporter
 end script
 EOT
-    service node_exporter start
+        service node_exporter start
+    fi
 fi
 
 printf "node_exporter successfully installed\n"

dist/common/scripts/scylla_coredump_setup

@@ -32,7 +32,7 @@ done
 if [ "$ID" = "ubuntu" ] && [ "$VERSION_ID" != "16.04" ]; then
     apt-get remove -y apport-noui
     sysctl -p /etc/sysctl.d/99-scylla.conf
-elif [ "$ID" = "debian" ]; then
+elif [ "$ID" = "debian" ] || [ "$ID" = "gentoo" ]; then
     sysctl -p /etc/sysctl.d/99-scylla.conf
 else
     if [ "$ID" = "ubuntu" ]; then

dist/common/scripts/scylla_cpuscaling_setup

@@ -12,6 +12,16 @@ if is_debian_variant; then
         systemctl enable cpufrequtils.service
     fi
     service cpufrequtils start
+elif is_gentoo_variant; then
+    emerge -uq sys-power/cpupower
+    sed -e 's/--governor ondemand/--governor performance/g' -i /etc/conf.d/cpupower
+    if is_systemd; then
+        systemctl enable cpupower-frequency-set.service
+        systemctl start cpupower-frequency-set.service
+    else
+        rc-update add cpupower default
+        service cpupower start
+    fi
 else
     yum install -y cpupowerutils || true
     echo 'CPUPOWER_START_OPTS="frequency-set -g performance"' > /etc/sysconfig/cpupower

dist/common/scripts/scylla_kernel_check

@@ -7,6 +7,8 @@
 if [ ! -f /sbin/mkfs.xfs ]; then
     if is_debian_variant; then
         apt-get install -y xfsprogs
+    elif is_gentoo_variant; then
+        emerge -uq sys-fs/xfsprogs
     else
         yum install -y xfsprogs
     fi

dist/common/scripts/scylla_lib.sh

@@ -9,6 +9,10 @@ is_redhat_variant() {
     [ -f /etc/redhat-release ]
 }
 
+is_gentoo_variant() {
+    [ -f /etc/gentoo-release ]
+}
+
 is_systemd() {
     grep -q '^systemd$' /proc/1/comm
 }
@@ -26,7 +30,7 @@ ec2_is_supported_instance_type() {
 }
 
 . /etc/os-release
-if is_debian_variant; then
+if is_debian_variant || is_gentoo_variant; then
     SYSCONFIG=/etc/default
 else
     SYSCONFIG=/etc/sysconfig

dist/common/scripts/scylla_ntp_setup

@@ -35,6 +35,16 @@ if is_debian_variant; then
     fi
     ntpdate `cat /etc/ntp.conf |egrep "^server"|head -n1|awk '{print $2}'`
     service ntp start
+elif is_gentoo_variant; then
+    emerge -uq net-misc/ntp
+    pidof ntpd &>/dev/null || ntpdate `cat /etc/ntp.conf |grep "^server"|head -n1|awk '{print $2}'`
+    if is_systemd; then
+        systemctl enable sntpd.service
+        systemctl start sntpd.service
+    else
+        rc-update add ntpd default
+        service ntpd start
+    fi
 else
     yum install -y ntp ntpdate || true
     if [ "$DOMAIN" != "" ]; then

dist/common/scripts/scylla_raid_setup

@@ -88,6 +88,8 @@ fi
 
 if is_debian_variant; then
     env DEBIAN_FRONTEND=noninteractive apt-get -y install mdadm xfsprogs
+elif is_gentoo_variant; then
+    emerge -uq sys-fs/mdadm sys-fs/xfsprogs
 else
     yum -y install mdadm xfsprogs
 fi

dist/common/scripts/scylla_selinux_setup

@@ -4,7 +4,9 @@
 
 . /usr/lib/scylla/scylla_lib.sh
 
-if ! is_debian_variant; then
+if is_debian_variant || is_gentoo_variant; then
+    echo "scylla_selinux_setup only supports Red Hat variants"
+else
     if [ "`sestatus | awk '{print $3}'`" != "disabled" ]; then
         setenforce 0
         sed --follow-symlinks -i -e "s/^SELINUX=enforcing/SELINUX=disabled/" /etc/sysconfig/selinux

dist/common/scripts/scylla_setup

@@ -74,6 +74,8 @@ interactive_ask_service() {
 verify_package() {
     if is_debian_variant; then
         dpkg -s $1 > /dev/null 2>&1 &&:
+    elif is_gentoo_variant; then
+        find /var/db/pkg/dev-db -type d -name "${1}-*" | egrep -q ".*"
     else
         rpm -q $1 > /dev/null 2>&1 &&:
     fi
@@ -269,6 +271,9 @@ if [ $ENABLE_SERVICE -eq 1 ]; then
     if is_systemd; then
         systemctl enable scylla-server.service
         systemctl enable collectd.service
+    elif is_gentoo_variant; then
+        rc-update add scylla-server default
+        rc-update add collectd default
     fi
     if [ $INTERACTIVE -eq 1 ] && [ ! -f /etc/scylla.d/housekeeping.cfg ]; then
         interactive_ask_service "Do you want to enable ScyllaDB version check?" "Answer yes to automatically start Scylla-housekeeping service that checks for a newer version periodically; answer no to skip this step." "yes" &&:
@@ -304,7 +309,9 @@ if [ "$CUR_VERSION" != "" ]; then
 fi
 
 # scylla_selinux_setup only supports Red Hat variants
-if ! is_debian_variant; then
+if is_debian_variant || is_gentoo_variant; then
+    echo "scylla_selinux_setup only supports Red Hat variants"
+else
     if [ $INTERACTIVE -eq 1 ]; then
         interactive_ask_service "Do you want to disable SELinux?" "Answer yes to disable SELinux and improve performance; answer no to keep it activated." "yes" &&:
         SELINUX_SETUP=$?