sre-salt-prime

Site Reliability Engineering / DevOps SaltStack configuration files

Code of Conduct

CODE_OF_CONDUCT.md:

The Creative Commons team is committed to fostering a welcoming community. This project and all other Creative Commons open source projects are governed by our Code of Conduct. Please report unacceptable behavior to [email protected] per our reporting guidelines.

Contributing

See CONTRIBUTING.md.

Development Notes

Avoid insecure repository clones: This repository includes encrypted secrets. Do not run git-crypt unlock on clones that are not otherwise secured (ex. strong login password, disk encryption).
Avoid editing the base environment: The base environment is configured to prevent commit and push actions. Please use your development environment and pull the changes to base.
Sign your commits:
- The main branch (default branch) has the Require signed commits (Include administrators) GitHub branch protection enabled.
  - About required commit signing - User Documentation
- Ensure you are using RemoteForward in your SSH configuration to forward your GnuPG agent to salt-prime (see the example configuration, under Setup, below).
- Ensure you have configured your newly cloned repository to sign commits (see the git config command, under Setup, below).

Setup

SSH connection information: example local/laptop ~/.ssh/config configugration:

Host bastion-us-east-2
    HostName bastion-us-east-2.creativecommons.org
    User ARTHUR

Host salt-prime
    HostName 10.22.11.11
    ProxyJump bastion-us-east-2
    RemoteForward /run/user/4242/gnupg/S.gpg-agent /Users/ARTHUR/.gnupg/S.gpg-agent.extra
    User ARTHUR

Host *
    ServerAliveCountMax 60
    ServerAliveInterval 30
    TCPKeepAlive no

Assumes remote username ARTHUR and remote uid 4242. Replace these values in your own local/laptop configuration.
ProxyJump allows you to ssh salt-prime from your local/laptop.
RemoteForward allows you to sign your commits.

Setup your development repository on salt-prime:
1. Clone repository to /srv with your username. For example:
```
cd /srv
git clone [email protected]:creativecommons/sre-salt-prime.git ${USER}
```
2. Setup your newly cloned repository.
  1. Configure commit signing:
```
cd /srv/${USER}
git config user.email YOUR_EMAIL
git config user.signingkey YOUR_GPG_ID
git config commit.gpgsign true
```
  2. Unlock encrypted secrets:
```
cd /srv/${USER}
git-crypt unlock
```
3. Specify the environment when you test changes. For example:
```
sudo salt \* state.highstate saltenv=${USER} test=True
```
  - use --state-verbose=True to see successes
  - use --state-output=full_id to see full detail of successes
  - use --log-level=debug --log-file-level=warning to see debug messages (without logging those debug messages, which may contain secrets, to the log file)

Goals

Use AWS well, but avoid technologies that create AWS lock-in (ex. Confidant)
Salt Prime must not contain any exclusive data (use Git)
Git repository must not contain any unencrypted secrets
Git repository commits must be signed and applied to the main branch via Pull Requests
A compromised minion must not be able to escalate access
- SysAdmins must not forward their SSH agent
- Must not reuse application passwords (ex. Prod and Dev databases must have different passwords)
- Pillar data must be restricted by Minion ID based classification
  - The only grain which can be safely used is grains['id'] which contains the Minion ID. (FAQ Q.21)

Decisions

Amazon Web Services (AWS)
- Creative Commons is already using it and staff are familiar with it
- Features allow security (ex. screened subnets, security groups policies)
- Features allows Infrastructure as Code
- us-east-2
  - cost effective
  - avoid conflict/collision over region limited resources (ex. ElasticIPs)
Debian 10 (Buster) and Debian 9 (Stretch)
- Free/Open Source
- Debian Stable
- Creative Commons is already using it and staff are familiar with it
git-crypt - transparent file encryption in git
- Free/Open Source
- Performance: files are decrypted in the checked out repository
- Security: automatic encryption and directory based filters minimize the chance of unencrypted secrets being pushed to GitHub
SaltStack
- Free/Open Source
- Performance
- Creative Commons is already using it and staff are familiar with it
- Version: 3000.9
  - For current targeted minion version, see minion_target_version in pillars/salt/init.sls

Host Classification

Minions are added and configured from salt-prime with the following Minion ID schema: HST__POD__LOC (host/role__pod/group__location). These variables are used to determine the state and pillar data.

Show top states example command:

sudo salt \* pillar.item states saltenv=${USER}

See docs/Host_Classification.md for details.

Orchestration

See docs/Orchestration.md.

References

SaltStack

For the SaltStack version that this repository is developed on, see Decisions, above.
This repository attempts to tracks the most current release of SaltStack in the SaltStack Debian repository: https://repo.saltstack.com/apt/debian/
For current version of SaltStack in Debian proper, see Debian -- Package Search Results -- salt-master

Best Practices

Hardening Salt
- The only grain which can be safely used is grains['id'] which contains the Minion ID. (FAQ Q.21)
Salt Best Practices
Salt Formulas

Frequently Referenced Documentation

Repository Documentation

Testing

testing/locust-ccengine/
- README.md

Formula Repositories

saltstack-formulas/mysql-formula: Install the MySQL client and/or server
saltstack-formulas/php-formula: Formula to set up and configure php
saltstack-formulas/postgres-formula: A formula to install and configure PostgreSQL server.

License

LICENSE (Expat/MIT License)

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