Flush all of the cache in memcached issue

[Satish Patel]

I am upgrading my PIKE to QUEENS and encounter this error, and look like following code using ubuntu style config and failed on CentOS 7 (I am using CentOS7)

We need to fix this code so it support centOS style format.

https://github.com/openstack/openstack-ansible/blob/master/scripts/upgrade-utilities/playbooks/memcached-flush.yml#L32

[root@ostack-controller-03-memcached-container-62ed61d8 ~]# echo 'flush_all' | nc $(awk '/-l/ {print $2}' /etc/sysconfig/memcached | awk -F, '{ print $1 }') $(awk '/^\\-p/ {print $2}' /etc/sysconfig/memcached )
Ncat: Connection refused.

[root@ostack-controller-03-memcached-container-62ed61d8 ~]# cat /etc/sysconfig/memcached
# Ansible managed

PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="3971"
OPTIONS="-l 192.168.100.226 -t 4 -v"

Above regex is wrong, after i craft new regex below it works..

[root@ostack-controller-03-memcached-container-62ed61d8 ~]# echo 'flush_all' | nc $(awk '/-l/ {print $2}' /etc/sysconfig/memcached | awk -F, '{ print $1 }') $(cat /etc/sysconfig/memcached | grep PORT | awk -F'"' '{print $2}' )
OK

[Mohammed Naser (mnaser)]

This is a valid bug, the best solution would be to use the Ansible variables instead.

https://github.com/openstack/openstack-ansible-memcached_server/blob/master/defaults/main.yml#L48-L49

[Satish Patel (satish-txt)]

Here problem is OSA deploying Ubuntu style configuration on CentOS7 and that is why that script get confused how to parse all values.

Why don't we fix this is OSA to deploy correct CentOS style config?

[Dmitriy Rabotyagov (noonedeadpunk)]

Queens is eol now so we can't fix any bugs for this release. I believe though this issue does not exist in next releases and upgrade process has improved dramatically there.