Nginx+Gunicorn+Django1.5 - connect() failed (111: Connection refused) while connecting to upstream

I'm getting this when accessing my domain: I'm seeing my default, http500 error django template being displayed.

I have gunicorn setup:

command = '/usr/local/bin/gunicorn'
logfile = "/home/ubuntu/virtualenv/myapp/error/gunicorn.log"
loglevel = "info"
pythonpath = '/home/ubuntu/virtualenv/myapp'
bind = '127.0.0.1:8001'
workers = 3

I have nginx config:

server {
        listen       80;
        server_name *.myapp.com;
        access_log /home/ubuntu/virtualenv/myapp/error/access.log;
        error_log /home/ubuntu/virtualenv/myapp/error/error.log warn;
        connection_pool_size 2048;

        fastcgi_buffer_size 4K;
        fastcgi_buffers 64 4k;

        root /home/ubuntu/virtualenv/myapp/homelaunch/;

        location /static/ {
            alias /home/ubuntu/virtualenv/myapp/homelaunch/static/;
            #alias /static/;
            #root /home/ubuntu/virtualenv/myapp/homelaunch/;
        }

        location / {
            proxy_pass http://127.0.0.1:8001;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            #proxy_set_header X-Forwarded-Host $server_name;
            #proxy_set_header X-Real-IP $remote_addr;
            add_header P3P 'CP="ALL DSP COR PSAa PSDa OUR NOR ONL UNI COM NAV"';
        }
    }

settings.py

#### LOCAL ENV
#DEBUG = True
#TEMPLATE_DEBUG = True

#### PRODUCTION ENV
DEBUG = False
TEMPLATE_DEBUG = False

ADMINS = (
        ('xxx', '[email protected]'),
    #('xxx', '[email protected]'),
)

MANAGERS = ADMINS

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': 'launch',                      # Or path to database file if using sqlite3.
        # The following settings are not used with sqlite3:
        'USER': 'root',
        'PASSWORD': 'xxx',
        'HOST': '',                      # Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP.
        'PORT': '',                      # Set to empty string for default.
    }
}

# Hosts/domain names that are valid for this site; required if DEBUG is False
# See https://docs.djangoproject.com/en/1.5/ref/settings/#allowed-hosts
ALLOWED_HOSTS = ['myapp.com','zzz.zz.zzz.zzz','ec2-zz-zz-zz-zz.compute-1.amazonaws.com']
#### MODIFY THIS ^^^^^^^^^^^^^^ WHEN USING IN PRODUCTION - DJANGO 1.5.
######## if this is left blank in production, it will not load.

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# In a Windows environment this must be set to your system time zone.
TIME_ZONE = 'America/Chicago'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'

SITE_ID = 1

# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale.
USE_L10N = True

# If you set this to False, Django will not use timezone-aware datetimes.
USE_TZ = True

# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/var/www/example.com/media/"
MEDIA_ROOT = ''

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://example.com/media/", "http://media.example.com/"
MEDIA_URL = ''

# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/var/www/example.com/static/"
STATIC_ROOT = '/home/ubuntu/virtualenv/myapp/homelaunch/static/'
#STATIC_ROOT = '/static/'
# URL prefix for static files.
# Example: "http://example.com/static/", "http://static.example.com/"
#STATIC_URL = '/home/ubuntu/virtualenv/myapp/homelaunch/static/'
STATIC_URL = '/static/'
# Additional locations of static files
STATICFILES_DIRS = (
    # Put strings here, like "/home/html/static" or "C:/www/django/static".
    # Always use forward slashes, even on Windows.
    # Don't forget to use absolute paths, not relative paths.
    #'/home/ubuntu/virtualenv/myapp/homelaunch/static/',
)

# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
#    'django.contrib.staticfiles.finders.DefaultStorageFinder',
)

# Make this unique, and don't share it with anybody.
SECRET_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
    'django.template.loaders.filesystem.Loader',
    'django.template.loaders.app_directories.Loader',
    'django.template.loaders.eggs.Loader',
)

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

ROOT_URLCONF = 'myapp.urls'

# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'myapp.wsgi.application'

TEMPLATE_DIRS = (
    # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
    # Always use forward slashes, even on Windows.
    # Don't forget to use absolute paths, not relative paths.
    '/home/ubuntu/virtualenv/myapp/homelaunch/templates',
)

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'south',
    'homelaunch',
    'gunicorn',
    # Uncomment the next line to enable the admin:
    # 'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
    # 'django.contrib.admindocs',
)

# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins on every HTTP 500 error when DEBUG=False.
# See http://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse'
        }
    },
    'handlers': {
        'mail_admins': {
            'level': 'ERROR',
            'filters': ['require_debug_false'],
            'class': 'django.utils.log.AdminEmailHandler'
        }
    },
    'loggers': {
        'django.request': {
            'handlers': ['mail_admins'],
            'level': 'ERROR',
            'propagate': True,
        },
    }
}

in error_log of this nginx I see:

2013/10/25 00:31:49 [error] 1840#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xxx.xx.xxx, server: myapp.com, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8001/", host: "myapp.com"

in access_log of this nginx config i see:

xx.xxx.xx.xxx - - [25/Oct/2013:00:31:49 +0000] "GET / HTTP/1.1" 502 173 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Firefox/24.0"

I already tried to read into the problem and saw adding:

  fastcgi_buffer_size 4K;
    fastcgi_buffers 64 4k;

to the nginx config may help this, but it didn't.

I'm a bit confused on how I can debug this from here? Can someone help?

Thank you.

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