Add App wizard cycles endlessly

[Timur Sufiev]

This is due to horizon using 'signed_cookies' backend for SESSION_ENGINE, and the browser inherent limit of 4K for per-domain cookies storage is no longer enough for Murano. Should switch in MOS configs to Memcache backend for cookies storage (since it's HA-compliant).

[Serg Melikyan (smelikyan)]

Timur, do we need to move to the memcached? MySQL wouldn't be sufficient?

[Serg Melikyan (smelikyan)]

SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

CACHES = {
    'default': {
        'BACKEND' : 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION' : "192.168.0.2:11211"
    },
    #'local': {
    # 'BACKEND' : 'django.core.cache.backends.locmem.LocMemCache'
    #}
}

И вот ссылка еще: https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/horizon/templates/local_settings.py.erb#L119

Looks like we are already using Memcache as a backend for sessions in MOS

[Ekaterina Chernova (efedorova)]

So this bug not reproduced in MOS

[Timur Sufiev (tsufiev-x)]

Fuel Team objected to using MySQL for that purpose, saying there are some problems in making it HA-compliant (as opposed to Memcached).

[Serg Melikyan (smelikyan)]

Memcached is already used by OpenStack Dashboard

[Timur Sufiev (tsufiev-x)]

Yet it is not used for SESSION_ENGINE: https://review.fuel-infra.org/gitweb?p=openstack/horizon.git;a=blob;f=openstack_dashboard/settings.py;h=32de55dbb20145f186e229a8569811cebd78edcf;hb=refs/heads/openstack-ci/fuel-6.1/2014.2#l234

[Serg Melikyan (smelikyan)]

You are looking at a wrong place: https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/horizon/templates/local_settings.py.erb#L119

[Timur Sufiev (tsufiev-x)]

What's equally important for us regarding this bug is where this variable https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/horizon/templates/local_settings.py.erb#L133 is defined?

[Serg Melikyan (smelikyan)]

Sorry, wrong link: https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/horizon/templates/local_settings.py.erb#L119

[Victor Ryzhenkin (vryzhenkin)]

Reproduced by Evgeny Sickachev on ISO:
{"build_id": "2015-02-15_22-54-44", "ostf_sha": "f9c37d0876141e1550eb4e703a8e500cd463282f", "build_number": "126", "release_versions": {"2014.2-6.1": {"VERSION": {"build_id": "2015-02-15_22-54-44", "ostf_sha": "f9c37d0876141e1550eb4e703a8e500cd463282f", "build_number": "126", "api": "1.0", "nailgun_sha": "1e3a40dd8a17abe1d38f42da1e0dc1a6d4572666", "production": "docker", "python-fuelclient_sha": "61431ed16fc00039a269424bdbaa410277eff609", "astute_sha": "1f87a9b9a47de7498b4061d15a8c7fb9435709d5", "feature_groups": ["mirantis"], "release": "6.1", "fuelmain_sha": "2054229e275d08898b5d079a6625ffcc79ae23b8", "fuellib_sha": "7f8d4382abfcd4338964182ebfea1d539f963e66"}}}, "auth_required": true, "api": "1.0", "nailgun_sha": "1e3a40dd8a17abe1d38f42da1e0dc1a6d4572666", "production": "docker", "python-fuelclient_sha": "61431ed16fc00039a269424bdbaa410277eff609", "astute_sha": "1f87a9b9a47de7498b4061d15a8c7fb9435709d5", "feature_groups": ["mirantis"], "release": "6.1", "fuelmain_sha": "2054229e275d08898b5d079a6625ffcc79ae23b8", "fuellib_sha": "7f8d4382abfcd4338964182ebfea1d539f963e66"}

[Ekaterina Chernova (efedorova)]

The root cause of that problem is that 'django_session_engine' is not set during installation
 https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/horizon/templates/local_settings.py.erb#L132

while is defined here https://github.com/stackforge/fuel-library/blob/1e7b825756cf77acab285e42fbf79f4299437067/deployment/puppet/horizon/spec/classes/horizon_init_spec.rb#L82

Note, that on the 6.0 version of MOS everything works fine

Can we set check that this variable is always set up?

[Timur Nurlygayanov (tnurlygayanov)]

Assigned to fuel-library team, because we need to change puppet manifests to fix the issue.

[Ekaterina Chernova (efedorova)]

https://review.openstack.org/#/c/157333/

[Aleksandr Didenko (adidenko)]

This bug does not affect older versions of Fuel since they use old Horizon puppet module with hardcoded SESSION_ENGINE. I've marked bug as invalid for those versions.