How to use Let's Encrypt on microstack

I’m using microstack for the ease of installing openstack, in my environment microstack is installed via snap on ubuntu (as suggested on the website). It’s working.

But I want to use a valid certificate. I tried using the let’s encrypt installed by snap as well. Make the files certified but it’s not working. How can I change the certificate to use let’s encrypt?

With the microstack and cert-bot install, this is what I’m doing:

cat <<'EOF' > /usr/local/bin/cert-renew


# move to the correct let's encrypt directory
mkdir -p /etc/letsencrypt/live
cd /etc/letsencrypt/live/$DOMAIN

# Ajustes para Microstack
snap set microstack config.tls.generate-self-signed=false
snap set microstack config.tls.cacert-path=/etc/letsencrypt/live/${DOMAIN}/chain.pem
snap set microstack config.tls.cert-path=/etc/letsencrypt/live/${DOMAIN}/cert.pem
snap set microstack config.tls.key-path=/etc/letsencrypt/live/${DOMAIN}/privkey.pem
snap set microstack config.tls.generate-cert=true

chmod u+x /usr/local/bin/cert-renew

certbot certonly --standalone --post-hook "/usr/local/bin/cert-renew" --preferred-challenges http --http-01-port 80 -d <>

The above code is running, creating the certificate and changing the config.tls values in the microstack.

Verified with the command

snap get microstack config.tls

I restart the server and it doesn’t work, I need to restore the old values to work again.

If i try execute a command

microstack.openstack image list

A error is show

Failed to discover available identity versions when contacting Attempting to parse version from URL.
Unable to establish connection to HTTPSConnectionPool(host='', port=5000): Max retries exceeded with url: /v3/auth/tokens (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f9b45e70340>: Failed to establish a new connection: [Errno 111] Connection refused'))

How i solve this? I have almost no knowledge in microstack, openstack, snap or let’s encrypt.