Vault looks like a winner for managing environment variables and secrets for container orchestration. Rancher is adding support for it in the near future [1], and confd already has it integrated [2].<p>IMHO Hashicorp has a good track record of delivering quality products for devops (packer, vagrant) and their documentation is quite nice.<p>1. <a href="https:&#x2F;&#x2F;youtu.be&#x2F;ZovLwCvb2Is?t=1h7m7s" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;ZovLwCvb2Is?t=1h7m7s</a><p>2. <a href="https:&#x2F;&#x2F;github.com&#x2F;kelseyhightower&#x2F;confd&#x2F;blob&#x2F;master&#x2F;docs&#x2F;quick-start-guide.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;kelseyhightower&#x2F;confd&#x2F;blob&#x2F;master&#x2F;docs&#x2F;qu...</a>