** Description changed: [Impact] memcached 1.5.22 in focal has a bug where it looks for its SASL configuration at /etc/sasl2/memcached.conf/memcached.conf instead of /etc/sasl2/memcached.conf. This causes a memcached setup with authentication that was working in bionic to fail in focal. The bug was introduced upstream in 1.5.7~3: https://github.com/memcached/memcached/commit/39151c870c5e598f039714bdb790bd46f614856e https://github.com/memcached/memcached/pull/366 and fixed upstream in 1.6.0~15: https://github.com/memcached/memcached/commit/6207330c2705fdb5f02de13b99a0d994f7c4f14a [Test Case] apt-get install memcached libmemcached-tools libsasl2-modules sasl2-bin mkdir /etc/sasl2 echo 'mech_list: plain' > /etc/sasl2/memcached.conf echo 'sasldb_path: /etc/sasl2/memcached-sasldb2' >> /etc/sasl2/memcached.conf echo bar | saslpasswd2 -p -f /etc/sasl2/memcached-sasldb2 -a memcached foo chown memcache: /etc/sasl2/memcached-sasldb2 - echo '-S' >> /etc/memcached.conf systemctl restart memcached memcping --servers=127.0.0.1 --binary --username=foo --password=bar - Works in bionic; fails in focal with “Failed to ping 127.0.0.1:11211 - WRITE FAILURE”. + Succeeds in bionic (with no output); fails in focal with “Failed to ping + 127.0.0.1:11211 UNKNOWN READ FAILURE” or “Failed to ping 127.0.0.1:11211 + WRITE FAILURE”; should succeed with the patch. + + If you want to test alternate locations for the SASL config file, here + are all four locations that will now work by default: + + • /etc/sasl/memcached.conf/memcached.conf: fails in bionic; accidentally succeeds in focal; should succeed with the patch + • /etc/sasl/memcached.conf: succeeds in bionic; fails in focal; should succeed with the patch + • /etc/sasl2/memcached.conf/memcached.conf: fails in bionic; accidentally succeeds in focal; should work with the patch + • /etc/sasl2/memcached.conf: succeeds in bionic; fails in focal; should succeed with the patch [Regression Potential] Low risk. The upstream patch is targeted and applies cleanly to 1.5.22. - It looks for the SASL configuration at both locations, so if someone - worked around this bug by creating + It looks for the SASL configuration at both the incorrect and correct + paths, so even in the (unlikely) event that someone worked around this + bug by manually creating a configuration file at the incorrect path /etc/sasl2/memcached.conf/memcached.conf, that will continue to be respected. + + If there were to be a regression, it would likely manifest as an + authentication failure, which clients may display as a read or write + failure, like the failure mode of the regression being fixed here.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1878721 Title: memcached looks for SASL configuration at wrong path /etc/sasl2/memcached.conf/memcached.conf (18.04→20.04 regression) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/memcached/+bug/1878721/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
