Adds support for ArchLinux as host OS

* fix rsyslog handling
* don't hardcode dokku path
* add documentation for ArchLinux package build
* add vagrant machine to run the ArchLinux specific steps
* add step in release process for ArchLinux
* enhance docs for easy ArchLinux steps

plugins/00_dokku-standard/install

@@ -9,6 +9,8 @@ if [[ ! -f  "$DOKKU_ROOT/VHOST" ]]; then
   [[ $(dig +short "$(< "$DOKKU_ROOT/HOSTNAME")") ]] && cp "$DOKKU_ROOT/HOSTNAME" "$DOKKU_ROOT/VHOST"
 fi
 
+dokku_path=$(which dokku)
+
 # temporary hack for https://github.com/dokku/dokku/issues/82
 # redeploys all apps after a reboot
 if [[ $(/sbin/init --version 2> /dev/null) =~ upstart ]]; then
@@ -19,7 +21,7 @@ start on filesystem and started docker
 
 script
   sleep 2 # give docker some time
-  sudo -i -u dokku /usr/local/bin/dokku ps:restore
+  sudo -i -u dokku $dokku_path ps:restore
 end script
 EOF
 fi
@@ -33,7 +35,7 @@ After=docker.target
 [Service]
 Type=simple
 User=dokku
-ExecStart=/usr/local/bin/dokku ps:restore
+ExecStart=$dokku_path ps:restore
 
 [Install]
 WantedBy=multi-user.target

plugins/20_events/install

@@ -2,7 +2,8 @@
 set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 
-DOKKU_RSYSLOG_FILTER=/etc/rsyslog.d/99-dokku.conf
+DOKKU_RSYSLOG_FILTER_DIR=/etc/rsyslog.d
+DOKKU_RSYSLOG_FILTER=$DOKKU_RSYSLOG_FILTER_DIR/99-dokku.conf
 DOKKU_LOGROTATE_FILE=/etc/logrotate.d/dokku
 
 flag_rsyslog_needs_restart=n
@@ -11,7 +12,7 @@ flag_rsyslog_needs_restart=n
 # exits gracefully if the path already exists
 mkdir -m 775 -p "$DOKKU_LOGS_DIR"
 case "$DOKKU_DISTRO" in
-  debian)
+  arch|debian)
     chgrp dokku "$DOKKU_LOGS_DIR"
     ;;
   *)
@@ -22,7 +23,7 @@ esac
 if [[ ! -f  "$DOKKU_EVENTS_LOGFILE" ]]; then
   touch "$DOKKU_EVENTS_LOGFILE"
   case "$DOKKU_DISTRO" in
-    debian)
+    arch|debian)
       chgrp dokku "$DOKKU_EVENTS_LOGFILE"
       ;;
     *)
@@ -33,7 +34,7 @@ if [[ ! -f  "$DOKKU_EVENTS_LOGFILE" ]]; then
   chmod 664 "$DOKKU_EVENTS_LOGFILE"
 fi
 
-if [[ ! -f  "$DOKKU_RSYSLOG_FILTER" ]]; then
+if [[ -d "$DOKKU_RSYSLOG_FILTER_DIR" && ! -f  "$DOKKU_RSYSLOG_FILTER" ]]; then
   cat >"$DOKKU_RSYSLOG_FILTER" <<EOF
 :syslogtag, contains, "dokku" $DOKKU_EVENTS_LOGFILE
 EOF
@@ -64,7 +65,7 @@ EOF
   flag_rsyslog_needs_restart=y
 fi
 
-if [[ "$flag_rsyslog_needs_restart" == "y" ]]; then
+if [[ -f "$DOKKU_RSYSLOG_FILTER" && "$flag_rsyslog_needs_restart" == "y" ]]; then
   service rsyslog restart
 fi
 

plugins/nginx-vhosts/dependencies

@@ -25,4 +25,8 @@ case "$DOKKU_DISTRO" in
   opensuse)
     zypper -q in -y nginx bind-utils
     ;;
+
+  arch)
+    pacman -S --noconfirm --noprogressbar --needed nginx bind-tools
+    ;;
 esac

plugins/nginx-vhosts/functions

@@ -32,6 +32,10 @@ restart_nginx() {
     opensuse)
       sudo /sbin/service nginx reload > /dev/null
       ;;
+
+    arch)
+      sudo /usr/bin/systemctl reload nginx
+	  ;;
   esac
 }
 

plugins/nginx-vhosts/install

@@ -13,6 +13,10 @@ case "$DOKKU_DISTRO" in
   opensuse)
     echo "%dokku ALL=(ALL) NOPASSWD:/sbin/service nginx reload, /usr/sbin/nginx -t" > /etc/sudoers.d/dokku-nginx
     ;;
+
+  arch)
+    echo "%dokku ALL=(ALL) NOPASSWD:/usr/bin/systemctl reload nginx, /usr/sbin/nginx -t" > /etc/sudoers.d/dokku-nginx
+    ;;
 esac
 
 chmod 0440 /etc/sudoers.d/dokku-nginx
@@ -57,4 +61,8 @@ case "$DOKKU_DISTRO" in
   opensuse)
     /sbin/service nginx start
     ;;
+
+  arch)
+    /usr/bin/systemctl start nginx
+    ;;
 esac

plugins/nginx-vhosts/post-delete

@@ -14,4 +14,8 @@ case "$DOKKU_DISTRO" in
   opensuse)
     sudo /sbin/service nginx reload > /dev/null
     ;;
+
+  arch)
+    sudo /usr/bin/systemctl reload nginx
+    ;;
 esac