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Systemd + Unicorn + Nginx + no-downtime-reload
# The only setting we feel strongly about is the fail_timeout=0
# directive in the "upstream" block. max_fails=0 also has the same
# effect as fail_timeout=0 for current versions of nginx and may be
# used in its place.
# you generally only need one nginx worker unless you're serving
# large amounts of static files which require blocking disk reads
worker_processes 1;
# # drop privileges, root is needed on most systems for binding to port 80
# # (or anything < 1024). Capability-based security may be available for
# # your system and worth checking out so you won't need to be root to
# # start nginx to bind on 80
user nginx;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log;
events {
worker_connections 1024; # increase if you have lots of clients
accept_mutex off; # "on" if nginx worker_processes > 1
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
# click tracking!
access_log /tmp/nginx.access.log combined;
# you generally want to serve static files with nginx since neither
# Unicorn nor Rainbows! is optimized for it at the moment
sendfile on;
tcp_nopush on; # off may be better for *some* Comet/long-poll stuff
tcp_nodelay off; # on may be better for some Comet/long-poll stuff
# we haven't checked to see if Rack::Deflate on the app server is
# faster or not than doing compression via nginx. It's easier
# to configure it all in one place here for static files and also
# to disable gzip for clients who don't get gzip/deflate right.
# There are other gzip settings that may be needed used to deal with
# bad clients out there, see http://wiki.nginx.org/NginxHttpGzipModule
gzip on;
gzip_http_version 1.0;
gzip_proxied any;
gzip_min_length 500;
gzip_disable "MSIE [1-6]\.";
#gzip_types text/plain text/html text/xml text/css
# text/comma-separated-values
# text/javascript application/x-javascript
# application/atom+xml;
# this can be any application server, not just Unicorn/Rainbows!
upstream app_server {
# fail_timeout=0 means we always retry an upstream even if it failed
# to return a good HTTP response (in case the Unicorn master nukes a
# single worker for timing out).
# for UNIX domain socket setups:
#server unix:/tmp/.sock fail_timeout=0;
server unix:/var/chiliproject/tmp/sockets/chili.sock fail_timeout=0;
# for TCP setups, point these to your backend servers
# server 192.168.0.7:8080 fail_timeout=0;
# server 192.168.0.8:8080 fail_timeout=0;
# server 192.168.0.9:8080 fail_timeout=0;
}
server {
listen 80 default deferred; # for Linux
# If you have IPv6, you'll likely want to have two separate listeners.
# One on IPv4 only (the default), and another on IPv6 only instead
# of a single dual-stack listener. A dual-stack listener will make
# for ugly IPv4 addresses in $remote_addr (e.g ":ffff:10.0.0.1"
# instead of just "10.0.0.1") and potentially trigger bugs in
# some software.
# listen [::]:80 ipv6only=on; # deferred or accept_filter recommended
client_max_body_size 4G;
server_name _;
# ~2 seconds is often enough for most folks to parse HTML/CSS and
# retrieve needed images/icons/frames, connections are cheap in
# nginx so increasing this is generally safe...
keepalive_timeout 5;
# path for static files
root /var/chiliproject/public;
# Prefer to serve static files directly from nginx to avoid unnecessary
# data copies from the application server.
#
# try_files directive appeared in in nginx 0.7.27 and has stabilized
# over time. Older versions of nginx (e.g. 0.6.x) requires
# "if (!-f $request_filename)" which was less efficient:
# http://bogomips.org/unicorn.git/tree/examples/nginx.conf?id=v3.3.1#n127
try_files $uri/index.html $uri.html $uri @app;
location @app {
# an HTTP header important enough to have its own Wikipedia entry:
# http://en.wikipedia.org/wiki/X-Forwarded-For
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# enable this if you forward HTTPS traffic to unicorn,
# this helps Rack set the proper URL scheme for doing redirects:
# proxy_set_header X-Forwarded-Proto $scheme;
# pass the Host: header from the client right along so redirects
# can be set properly within the Rack application
proxy_set_header Host $http_host;
# we don't want nginx trying to do something clever with
# redirects, we set the Host: header above already.
proxy_redirect off;
# set "proxy_buffering off" *only* for Rainbows! when doing
# Comet/long-poll/streaming. It's also safe to set if you're using
# only serving fast clients with Unicorn + nginx, but not slow
# clients. You normally want nginx to buffer responses to slow
# clients, even with Rails 3.1 streaming because otherwise a slow
# client can become a bottleneck of Unicorn.
#
# The Rack application may also set "X-Accel-Buffering (yes|no)"
# in the response headers do disable/enable buffering on a
# per-response basis.
# proxy_buffering off;
proxy_pass http://app_server;
}
# Rails error pages
error_page 500 502 503 504 /500.html;
location = /500.html {
root /var/chiliproject/public;
}
}
server {
listen 443 default deferred; # for Linux
client_max_body_size 4G;
server_name _;
keepalive_timeout 5;
ssl on;
ssl_certificate myssl.crt;
ssl_certificate_key myssl.key;
ssl_session_timeout 5m;
# path for static files
root /var/chiliproject/public;
try_files $uri/index.html $uri.html $uri @app;
location @app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://app_server;
}
error_page 500 502 503 504 /500.html;
location = /500.html {
root /var/chiliproject/public;
}
}
}
# Sample verbose configuration file for Unicorn (not Rack)
#
# This configuration file documents many features of Unicorn
# that may not be needed for some applications. See
# http://unicorn.bogomips.org/examples/unicorn.conf.minimal.rb
# for a much simpler configuration file.
#
# See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
# documentation.
# Use at least one worker per core if you're on a dedicated server,
# more will usually help for _short_ waits on databases/caches.
worker_processes 4
# Since Unicorn is never exposed to outside clients, it does not need to
# run on the standard HTTP port (80), there is no reason to start Unicorn
# as root unless it's from system init scripts.
# If running the master process as root and the workers as an unprivileged
# user, do this to switch euid/egid in the workers (also chowns logs):
# user "unprivileged_user", "unprivileged_group"
# Help ensure your application will always spawn in the symlinked
# "current" directory that Capistrano sets up.
working_directory "/var/chiliproject" # available in 0.94.0+
# listen on both a Unix domain socket and a TCP port,
# we use a shorter backlog for quicker failover when busy
#listen "/tmp/.sock", :backlog => 64
listen "/var/chiliproject/tmp/sockets/chili.sock", :backlog => 64
listen 8080, :tcp_nopush => true
# nuke workers after 30 seconds instead of 60 seconds (the default)
timeout 30
# feel free to point this anywhere accessible on the filesystem
#pid "/path/to/app/shared/pids/unicorn.pid"
pid "/var/chiliproject/tmp/pids/unicorn.pid"
# By default, the Unicorn logger will write to stderr.
# Additionally, ome applications/frameworks log to stderr or stdout,
# so prevent them from going to /dev/null when daemonized here:
stderr_path "/var/chiliproject/log/unicorn.stderr.log"
stdout_path "/var/chiliproject/log/unicorn.stdout.log"
# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
GC.copy_on_write_friendly = true
before_fork do |server, worker|
# the following is highly recomended for Rails + "preload_app true"
# as there's no need for the master process to hold a connection
defined?(ActiveRecord::Base) and
ActiveRecord::Base.connection.disconnect!
# The following is only recommended for memory/DB-constrained
# installations. It is not needed if your system can house
# twice as many worker_processes as you have configured.
#
# # This allows a new master process to incrementally
# # phase out the old master process with SIGTTOU to avoid a
# # thundering herd (especially in the "preload_app false" case)
# # when doing a transparent upgrade. The last worker spawned
# # will then kill off the old master process with a SIGQUIT.
old_pid = "#{server.config[:pid]}.oldbin"
if old_pid != server.pid
begin
sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
Process.kill(sig, File.read(old_pid).to_i)
rescue Errno::ENOENT, Errno::ESRCH
end
end
#
# Throttle the master from forking too quickly by sleeping. Due
# to the implementation of standard Unix signal handlers, this
# helps (but does not completely) prevent identical, repeated signals
# from being lost when the receiving process is busy.
# sleep 1
end
after_fork do |server, worker|
# per-process listener ports for debugging/admin/migrations
# addr = "127.0.0.1:#{9293 + worker.nr}"
# server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)
# the following is *required* for Rails + "preload_app true",
defined?(ActiveRecord::Base) and
ActiveRecord::Base.establish_connection
# if preload_app is true, then you may also want to check and
# restart any other shared sockets/descriptors such as Memcached,
# and Redis. TokyoCabinet file handles are safe to reuse
# between any number of forked children (assuming your kernel
# correctly implements pread()/pwrite() system calls)
end
[Unit]
Description=Chiliproject unicorn server
[Service]
Type=simple
SyslogIdentifier=gl-unicorn
User=chili
PIDFile=/var/chiliproject/tmp/pids/unicorn.pid
WorkingDirectory=/var/chiliproject
ExecStart=/home/chili/chiliproject.sh
#ExecReload=/bin/kill -s HUP $MAINPID
ExecReload=/bin/kill -s USR2 $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
[Install]
WantedBy=multi-user.target
@theist

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@theist theist commented Aug 31, 2016

/home/chili/chiliproject.sh ? missed?

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