Keystone certs expire every year

From /etc/keystone/ssl/certs

# This makes the Certificate Signing Request (CSR)

openssl req -newkey rsa:2048 -keyout signing_key.pem -keyform PEM -out signing_\
cert_req.pem -outform PEM -config openssl.conf -nodes
Unset
Unset
Unset
Unset
Unset
US
clemson-clemson-control-1

openssl ca -config openssl.conf -keyfile cakey.pem -cert ca.pem -in signing_cer\
t_req.pem -out signing_cert_new.pem
y
y

Change the permissions of the new cert: chown keystone.keystone signing_cert_new.pem

sudo keystone-manage pki_setup --keystone-user keystone --keystone-group keystone

The other openstack services maintain their own copy of the cert, so you must replace them:

cp /etc/keystone/ssl/certs/ca.pem /var/lib/nova/keystone-signing/cacert.pem
cp /etc/keystone/ssl/certs/signing_cert.pem /var/lib/nova/keystone-signing/signing_cert.pem
restart nova-api
cp /etc/keystone/ssl/certs/ca.pem /var/lib/cinder/cacert.pem
cp /etc/keystone/ssl/certs/signing_cert.pem /var/lib/cinder/signing_cert.pem
restart cinder-api
cp /etc/keystone/ssl/certs/ca.pem /var/lib/quantum/keystone-signing/cacert.pem
cp /etc/keystone/ssl/certs/signing_cert.pem /var/lib/quantum/keystone-signing/signing_cert.pem
restart quantum-server
cp /etc/keystone/ssl/certs/ca.pem /var/lib/glance/keystone-signing/cacert.pem
cp /etc/keystone/ssl/certs/signing_cert.pem /var/lib/glance/keystone-signing/signing_cert.pem
restart glance-api
restart glance-registry