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This guide explains how to setup cronus to be used in rails action mailer.

Setup

Technical user

  1. The technical user dashboard hast to own the role email_user in all the regions where cronus should be used and within the domain ccadmin and project master. We decide to use seeds in this case. See this commit for more information: https://github.com/sapcc/helm-charts/commit/c5b26a6244ddc3de953ff1a71b6ee00929af82e5

  2. Deploy elektra in all regions where cronus should be used so the new seed configuration can be applyed.

  3. To check if the seeder had any error when rolling out the changes check the logs from the seeder pod in the right region.

    Example:

    kubectl config use context qa-de-1
kubectl -n monsoon3 get pods
kubectl -n monsoon3 logs openstack-seeder-76db46b59-dqjxc

  4. Setup a webshell with following envs opening the dashboard in the right region:

    Unset following env variable:

    unset OS_AUTH_TYPE
unset OS_AUTH_TOKEN
unset OS_TOKEN

    And be sure you have set following env variable:

    export OS_PROJECT_DOMAIN_NAME=ccadmin
export OS_USERNAME=dashboard
export OS_USER_DOMAIN_NAME=default
export OS_PROJECT_NAME=cloud_admin
export OS_PASSWORD=<password>

  5. Check that the dashboard user has the role email_user in each region where cronus will be used:

    os role assignment list --project=master --role=email_user

  6. Create ec2 credentials for the dashboard user in each region where cronus will be used:

    os ec2 credentials create --project=master

  7. Retrieve the credentials to be saved in vault afterwards

    OS_PROJECT_NAME=master cronuscli smtp credentials

Testing with telnet

  1. Create a file with following content and following name smtp-test-login.txt

    EHLO cloud.sap
AUTH LOGIN
<ec2 user name>
<ec2 user password>
MAIL FROM: noreply+dashboard@email.global.cloud.sap
RCPT TO: some.real.email@some.real.domain
DATA
From: Sender name <noreply+dashboard@email.global.cloud.sap>
To: some.real.email@some.real.domain
Subject: Telnet test

This message was sent from elektra
.
QUIT

  2. Run following command from your terminal

    openssl s_client -crlf -quiet -connect smtp.server.address:465 < smtp-test-login.txt