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To run a secure system, it's important that you change the defau= lt passwords. This page gives a way to randomize passwords.
The configuration repository supplies well known default passwords for s= ervices, typically defined in the defaults/main.yml file for any particular= role. By convention all such passwords have a name that clearly indi= cates they are passwords, typically ROLE_PURPOSE_PASSWORD.
You should ensure that these values are overridden if you are deploying = a non-development environment. There are real world examples of folks= losing their data because they had neither updated default password, nor e= nsured that access to services was blocked at the network.
Please do both and if you have questions about how to do so, ask on Slac= k.
One way to ensure that your passwords are overridden is to pass in overr= ides when you are installing Open edX using Ansible. Ansible lets you= pass in a file of overrides using the -e@/path/to/file.yml convention.
As of February 2, 2017, we recommend that you override at least the foll= owing values https://raw.githubusercontent.com/edx/configuration/master/playb= ooks/sample_vars/passwords.yml
That file's contents look like so:
ANALY= TICS_API_EMAIL_HOST_PASSWORD: !!null ANALYTICS_PIPELINE_OUTPUT_DATABASE_PASSWORD: !!null ANALYTICS_SCHEDULE_MASTER_SSH_CREDENTIAL_PASSPHRASE: !!null COMMON_HTPASSWD_PASS: !!null COMMON_HTPASSWD_USER: !!null COMMON_MONGO_READ_ONLY_PASS: !!null COMMON_MYSQL_ADMIN_PASS: !!null COMMON_MYSQL_MIGRATE_PASS: !!null COMMON_MYSQL_READ_ONLY_PASS: !!null ...
This can be done easily from the bash command line. Add the conten= t above to a file named passwords.yml and run the following command from th= e same directory in which you have created the file.
while= IFS=3D read line; do REPLACE=3D$(LC_ALL=3DC < /dev/urandom tr -dc 'A-Za= -z0-9' | head -c35) && echo "$line" | sed "s/\!\!null/\'$REPLACE\'/= "; done < ./passwords.yml > ./my-passwords.yml
This creates a new file named my-passwords.yml, and its content should l= ook something like the following:
ANALY= TICS_API_EMAIL_HOST_PASSWORD: '58Ld0verTyG2M7ht64SzVvMb4rylWXHHzII' ANALYTICS_PIPELINE_OUTPUT_DATABASE_PASSWORD: 'tjX28dM0QhjXgySJ9JLU9io9nckod= jxjJmo' ANALYTICS_SCHEDULE_MASTER_SSH_CREDENTIAL_PASSPHRASE: 'kBMlvEUqsaGFDSSzasown= yDiXK9tTIcGTdZ' COMMON_HTPASSWD_PASS: 'JKhFjY8SA2LI2GdK8nK0SLM1HgzzFR4cuEb' COMMON_HTPASSWD_USER: '4xLx6FPc8Bni5MUjRbVLzvThERmSO2AIJBZ' COMMON_MONGO_READ_ONLY_PASS: 'UXfWWuXnfSb962jQ1yB4gbPaGRQ0dOZCCYh' COMMON_MYSQL_ADMIN_PASS: 'yxaLDLsZXb4FDAOpj9HD42Sr4UYBLNmLJP2' COMMON_MYSQL_MIGRATE_PASS: 'CXwSNlQ7QtK6al6MXxsrrt12PfQxfs8ydZf' COMMON_MYSQL_READ_ONLY_PASS: 'CBnZ0bxVmGGc7HEQQXWlTUc8C0MbVev6mYU' ...
Keep the my-passwords.yml file in a safe location, ideally encrypted.&nb= sp; If you don't have another solution for this, we recommend that you use = ansible-vault, which comes with your ansible installation
Starting from a bare Ubuntu Xenial installation, you can follow these st= eps:
# Ens= ure your instance is upgraded to the latest Xenial sudo apt-get update -y sudo apt-get upgrade -y reboot # Installed the edx_ansible role wget https://raw.githubusercontent.com/edx/configuration/master/util/instal= l/ansible-bootstrap.sh -O - | sudo bash # Create passwords specific to your installation. Please consider that you'= ll need to share these across application nodes if you have multiple # The password files will be owned by root. cd /edx/app/edx_ansible/ sudo wget https://raw.githubusercontent.com/edx/configuration/master/playbo= oks/sample_vars/passwords.yml while IFS=3D read line; do REPLACE=3D$(LC_ALL=3DC < /dev/urandom tr -dc = 'A-Za-z0-9' | head -c35) && echo "$line" | sed "s/\!\!null/\'$REPLA= CE\'/"; done < ./passwords.yml | sudo tee ./my-passwords.yml # Encrypt your environment specific secrets with Ansible vault. This step = will prompt you to create a password=20 # for accessing your encrypted data. It is IMPERATIVE that you do not lose= or forget this password=20 sudo /edx/app/edx_ansible/venvs/edx_ansible/bin/ansible-vault encrypt ./my-= passwords.yml # Install the native installation using your encrypted passwords cd /edx/app/edx_ansible/edx_ansible/playbooks/ sudo /edx/app/edx_ansible/venvs/edx_ansible/bin/ansible-playbook -c local .= /edx_sandbox.yml -i 'localhost,' -e@/edx/app/edx_ansible/my-passwords.yml -= -ask-vault-pass
When you build you deployment environment, ensure that you add `-e@/path= /to/my-passwords.yml` to your call to ansible-playbook.
Doing this on an already running system is another matter entirely. = ; It's possible, but will require more specific expertise around managing M= ySQL, MongoDB, RabbitMQ and ElasticSearch
We strongly recommend that you review the ports that are exposed on your= hosts regularly.
Running the following command from a host that is public from the point = of view of your Open edX instance is useful
nmap = -Pn -p- edx.mydomain.info
The fewer ports that are open the better. You should be concerned = if more than 80 (http), 443 (https) and 22 (ssh) are open. Ideally 22= , ssh, would also be limited to networks that you control.