diff options
Diffstat (limited to 'unicorn')
| -rw-r--r-- | unicorn | 303 |
1 files changed, 303 insertions, 0 deletions
@@ -0,0 +1,303 @@ +#!/bin/sh + +# PROVIDE: unicorn +# REQUIRE: LOGIN postgresql +# KEYWORD: shutdown + +. /etc/rc.subr + +name="unicorn" +rcvar=`set_rcvar` +procname="ruby" + +extra_commands="upgrade show reopenlogs" +start_cmd="unicorn_start_command" +upgrade_cmd="unicorn_upgrade_command" +show_cmd="unicorn_show_command" +reopenlogs_cmd="unicorn_reopenlogs_command" + +load_rc_config "${name}" + +: ${unicorn_enable:="NO"} +: ${unicorn_flags:="-D"} +: ${unicorn_env:="production"} +: ${unicorn_init_config:=""} +: ${unicorn_bundle_gemfile:=""} +: ${unicorn_profiles:=""} +: ${unicorn_upgrade_timeout:="60"} +: ${unicorn_rc_script:="/usr/local/etc/rc.d/unicorn"} + +# +# Convenience function to read a profile's environment variable, or fall back to a default +# +# e.x. _read_profile_var my_app pidfile '/u/my_app/shard/pids/unicorn.pid' +# +_read_profile_var() +{ + profile=$1 + var=$2 + default=$3 + default2=$4 + eval value="\${unicorn_${profile}_${var}:-${default}}" + eval value="\${value:-${default2}}" + echo "${value}" +} + +# +# Takes a directory and sets up some default environement variables based on a capistrano layout +# +_setup_directory() +{ + local directory + directory=$1 + + directory_command="${directory}/current/bin/unicorn_rails" + directory_pidfile="${directory}/shared/pids/unicorn.pid" + directory_old_pidfile="${directory_pidfile}.oldbin" + directory_config="${directory}/current/config/unicorn.conf.rb" + directory_rackup="${directory}/current/config.ru" + directory_init_config="${directory}/current/.env" + directory_bundle_gemfile="${directory}/current/Gemfile" + directory_chdir="${directory}/current" + + # only use the directory_init_config if it exists + if [ ! -f "${directory_init_config}" ]; then + unset directory_init_config + fi + + # only use the bundle_gemfile if it exists + if [ ! -f "${directory_bundle_gemfile}" ]; then + unset directory_bundle_gemfile + fi + + if [ -f "${directory_config}" ]; then + directory_user=`stat -f "%Su" "${directory_config}"` # default to the owner of the config file + fi +} + +# +# If we have a profile, set up the environment for that profile +# +if [ -n "$2" ]; then + profile="$2" + + # set the rcvar for this specific profile + rcvar=`set_rcvar "${name}_${profile}"` + # if the user provides a directory, we can infer some default configuration + directory=`_read_profile_var "${profile}" "directory"` + + if [ -n "${directory}" ]; then + _setup_directory "${directory}" + fi + + unicorn_rackup=` _read_profile_var "${profile}" "rackup" "${directory_rackup}"` + unicorn_old_pidfile=` _read_profile_var "${profile}" "old_pidfile" "${directory_old_pidfile}"` + unicorn_config=` _read_profile_var "${profile}" "config" "${directory_config}"` + unicorn_init_config=` _read_profile_var "${profile}" "init_config" "${directory_init_config}"` + unicorn_bundle_gemfile=`_read_profile_var "${profile}" "bundle_gemfile" "${directory_bundle_gemfile}"` + unicorn_chdir=` _read_profile_var "${profile}" "chdir" "${directory_chdir}"` + unicorn_listen=` _read_profile_var "${profile}" "listen" "${unicorn_listen}"` + unicorn_user=` _read_profile_var "${profile}" "user" "${unicorn_user}" "${directory_user}"` + unicorn_nice=` _read_profile_var "${profile}" "nice" "${unicorn_nice}"` + unicorn_env=` _read_profile_var "${profile}" "env" "${unicorn_env}"` + unicorn_flags=` _read_profile_var "${profile}" "flags" "${unicorn_flags}"` + + command=`_read_profile_var "${profile}" "command" "${unicorn_command}" "${directory_command}"` + pidfile=`_read_profile_var "${profile}" "pidfile" "${directory_pidfile}"` +else + if [ "x${unicorn_profiles}" != "x" -a "x$1" != "x" ]; then + # If we weren't started with a profile, run the command on all available profiles + for profile in ${unicorn_profiles}; do + # By default set the profile rcvar to no to suppress warnings by checkyesno + profile_rcvar=`set_rcvar "${name}_${profile}"` + eval "${profile_rcvar}=\${${profile_rcvar}:-'NO'}" + + if checkyesno ${profile_rcvar}; then + echo "Running ${1} on ${profile}" + ${unicorn_rc_script} $1 $profile + else + echo "Skipping ${profile}" + + # Unset the variable and then checkyesno again to print the warning + eval "unset ${profile_rcvar}" + checkyesno ${profile_rcvar} + fi + echo + done + exit 0 + else + # look for a profile-less configuration + + # if the user provides a directory, we can infer some default configuration + directory=${unicorn_directory:-} + + if [ -n "${directory}" ]; then + _setup_directory "${directory}" + fi + + unicorn_rackup=${unicorn_rackup:-$directory_rackup} + unicorn_old_pidfile=${unicorn_old_pidfile:-$directory_old_pidfile} + unicorn_chdir=${unicorn_chdir:-$directory_chdir} + unicorn_user=${unicorn_user:-$directory_user} + unicorn_config=${unicorn_config:-$directory_config} + unicorn_init_config=${unicorn_init_config:-$directory_init_config} + unicorn_bundle_gemfile=${unicorn_bundle_gemfile:-$directory_bundle_gemfile} + + command=${unicorn_command:-$directory_command} + pidfile=${unicorn_pidfile:-$directory_pidfile} + fi +fi + +# add the directory as a required directory, if it's specified +required_dirs="${directory:-}" + +# if we have a config file or rackup file specified, make sure it exists +required_files="${unicorn_config:-} ${unicorn_rackup:-}" + +# +# Build up the flags based on the environment variables +# +[ -n "${unicorn_listen}" ] && unicorn_flags="-l ${unicorn_listen} ${unicorn_flags}" +[ -n "${unicorn_config}" ] && unicorn_flags="-c ${unicorn_config} ${unicorn_flags}" +[ -n "${unicorn_env}" ] && unicorn_flags="-E ${unicorn_env} ${unicorn_flags}" + +# Add our rackup file to the unicorn command_args +[ -n "${unicorn_rackup:-}" ] && command_args="${unicorn_rackup:-}" + +# This function builds the command to start unicorn. This is split out so we can +# print it from the "show" command +_unicorn_start_command() +{ + local shell_command + shell_command="${unicorn_bundle_gemfile:+export BUNDLE_GEMFILE=$unicorn_bundle_gemfile && }"\ +"${unicorn_init_config:+. $unicorn_init_config && }"\ +"${unicorn_chdir:+cd $unicorn_chdir && }"\ +"${unicorn_nice:+nice -n $unicorn_nice }"\ +"${command} ${rc_flags} ${command_args}" + + if [ -n "${unicorn_user}" ]; then + echo "su -l ${unicorn_user} -c \"${shell_command}\"" + else + echo "sh -c \"${shell_command}\"" + fi +} + +# +# The start command +# +unicorn_start_command() +{ + # ensure unicorn isn't already running + if [ -z "$rc_fast" -a -n "$rc_pid" ]; then + echo 1>&2 "${name} already running? (pid=$rc_pid)." + return 1 + fi + + # ensure that the command exists and is executable + if [ ! -x ${_chroot}${_chroot:+"/"}${command} ]; then + warn "run_rc_command: cannot run $command" + return 1 + fi + + check_startmsgs && echo "Starting ${name}: ${profile}." + + eval "$(_unicorn_start_command)" + _return=$? + + if [ $_return -ne 0 ] && [ -z "${rc_force}" ]; then + return 1 + fi + + return 0 +} + +unicorn_upgrade_command() +{ + if [ -n "${rc_pid}" ]; then + # Tell the master to spawn a new version of itself + if kill -USR2 "${rc_pid}"; then + n=$unicorn_upgrade_timeout + + # Wait until the unicorn_old_pidfile and pidfile both exist and are non-empty + echo -n >&2 "Waiting for the new master to spawn" + while [ \( ! -s "${unicorn_old_pidfile}" -o ! -s "${pidfile}" \) -a $n -ge 0 ]; do + printf >&2 '.' && sleep 1 && n=$(( $n-1 )) + done + echo + + # if the pidfile or unicorn_old_pidfile still don't exist, quit + if [ ! -s "${pidfile}" -o ! -s "${unicorn_old_pidfile}" ]; then + [ ! -s "${pidfile}" ] && echo >&2 "${pidfile} doesn't exist after ${unicorn_upgrade_timeout} seconds" + [ ! -s "${punicorn_old_pidfile}" ] && echo >&2 "${unicorn_old_pidfile} doesn't exist after ${unicorn_upgrade_timeout} seconds" + return 1 + fi + + # make sure the new master can receive signals, and then QUIT the old one + echo >&2 "Killing the old master" + kill -0 `check_pidfile "${pidfile}" "${procname}"` && kill -QUIT `check_pidfile "${unicorn_old_pidfile}" "${procname}"` + + # Wait for the old master to die + echo -n >&2 "Waiting for the old master to cleanup" + while [ -s "${unicorn_old_pidfile}" -a $n -ge 0 ]; do + printf >&2 '.' && sleep 1 && n=$(( $n-1 )) + done + echo + + # If the old master is still around, print that fact and exit with an error + if [ -s "${unicorn_old_pidfile}" -a $n -lt 0 ]; then + echo >&2 "${unicorn_old_pidfile} still exists after ${unicorn_upgrade_timeout} seconds" + return 1 + fi + + # everything worked, return success + return 0 + fi + + # If there isn't a pid in rc_pid, just run the start command + echo >&2 "Couldn't upgrade, running `start` instead" + $0 start "${2}" + fi +} + +# +# Prints the configuration for the given profile +# +unicorn_show_command() +{ + if [ -n "${profile}" ]; then + banner="Unicorn Configuration for ${profile}" + else + banner="Unicorn Configuration" + fi + + echo " +# +# ${banner} +# + +command: ${command} +command_args: ${command_args} +pidfile: ${pidfile} +old_pidfile: ${unicorn_old_pidfile} +listen: ${unicorn_listen} +config: ${unicorn_config} +init_config: ${unicorn_init_config} +bundle_gemfile: ${unicorn_bundle_gemfile} +chdir: ${unicorn_chdir} +user: ${unicorn_user} +nice: ${unicorn_nice} +env: ${unicorn_env} +flags: ${unicorn_flags} + +start_command: + +$(_unicorn_start_command) +" +} + +unicorn_reopenlogs_command() +{ + [ -n "${rc_pid}" ] && kill -USR1 $rc_pid +} + +run_rc_command "${1}" |