Pulp

The on_demand download policy lets Pulp defer the download of a content unit until it's requested. When a content unit is requested for the first time, Pulp downloads the file and streams it to the requesting client as the content becomes available. When the same content unit is requested in the future, Squid serves the file directly. For whatever reason, Squid is not serving cached copies of content units.

The tests cases that demonstrate this issue are:

• pulp_smash.tests.rpm.api_v2.test_download_policies.OnDemandTestCase.test_rpm_cache_control_header
• pulp_smash.tests.rpm.api_v2.test_download_policies.OnDemandTestCase.test_same_rpm_cache_header
• pulp_smash.tests.rpm.api_v2.test_download_policies.SwitchPoliciesTestCase.test_background_to_on_demand
• pulp_smash.tests.rpm.api_v2.test_download_policies.SwitchPoliciesTestCase.test_immediate_to_on_demand

Attached is the output produced by Pulp Smash when these tests are executed (pending this pr). The test failures clearly describe cache misses occurring. I can reproduce this issue on at least Fedora 24 and Fedora 25 with Pulp 2.12 and Pulp 2.13. Manual investigation of all these systems shows that:

• Squid is running.
• All services are OK, according to systemctl status.
• No error messages are logged, according to journalctl.

Here's some of the packages installed on my Fedora 24 system with Pulp 2.12 installed:

[root@fedora-24-pulp-2-12 ~]# rpm -qa | grep squid | sort
squid-3.5.20-1.fc24.x86_64
[root@fedora-24-pulp-2-12 ~]# rpm -qa | grep -i pulp | sort
pulp-admin-client-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
pulp-docker-admin-extensions-2.3.1-0.1.alpha.git.1.ad83c84.fc24.noarch
pulp-docker-plugins-2.3.1-0.1.alpha.git.1.ad83c84.fc24.noarch
pulp-ostree-admin-extensions-1.2.1-0.1.alpha.git.22.19760f7.fc24.noarch
pulp-ostree-plugins-1.2.1-0.1.alpha.git.22.19760f7.fc24.noarch
pulp-puppet-admin-extensions-2.12.1-0.1.alpha.git.1.d407541.fc24.noarch
pulp-puppet-plugins-2.12.1-0.1.alpha.git.1.d407541.fc24.noarch
pulp-python-admin-extensions-2.0.1-0.1.alpha.git.2.be7d11e.fc24.noarch
pulp-python-plugins-2.0.1-0.1.alpha.git.2.be7d11e.fc24.noarch
pulp-rpm-admin-extensions-2.12.1-0.1.alpha.git.23.f90340d.fc24.noarch
pulp-rpm-plugins-2.12.1-0.1.alpha.git.23.f90340d.fc24.noarch
pulp-selinux-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
pulp-server-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
python-kombu-3.0.33-6.pulp.fc24.noarch
python-pulp-bindings-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
python-pulp-client-lib-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
python-pulp-common-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
python-pulp-docker-common-2.3.1-0.1.alpha.git.1.ad83c84.fc24.noarch
python-pulp-oid_validation-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
python-pulp-ostree-common-1.2.1-0.1.alpha.git.22.19760f7.fc24.noarch
python-pulp-puppet-common-2.12.1-0.1.alpha.git.1.d407541.fc24.noarch
python-pulp-python-common-2.0.1-0.1.alpha.git.2.be7d11e.fc24.noarch
python-pulp-repoauth-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch
python-pulp-rpm-common-2.12.1-0.1.alpha.git.23.f90340d.fc24.noarch
python-pulp-streamer-2.12.1-0.1.alpha.git.67.22eb720.fc24.noarch