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Last pushed: 7 months ago
Short Description
https://github.com/ployst/docker-letsencrypt
Full Description

letsencrypt-kubernetes

A docker image suitable for requesting new certificates from letsencrypt,
and storing them in a secret on kubernetes.

Available on docker hub as ployst/letsencrypt

Purpose

To provide an application that owns certificate requesting and storing.

  • To serve acme requests to letsencrypt (given that you direct them to this
    container)
  • To regularly (monthly) ask for new certificates.
  • To store those new certificates in a secret on kubernetes.

Useful commands

Generate a new set of certs

Once this container is running you can generate new certificates using:

kubectl exec -it <pod> -- bash -c 'EMAIL=fred@fred.com DOMAINS=example.com foo.example.com ./fetch_certs.sh'

Save the set of certificates as a secret

kubectl exec -it <pod> -- bash -c 'DOMAINS=example.com foo.example.com ./save_certs.sh'

Refresh the certificates

kubectl exec -it <pod> -- bash -c 'EMAIL=fred@fred.com DOMAINS=example.com foo.example.com SECRET_NAME=foo DEPLOYMENTS=bar ./refresh_certs.sh'

Environment variables:

  • EMAIL - the email address to obtain certificates on behalf of.
  • DOMAINS - a space separated list of domains to obtain a certificate for.
  • LETSENCRYPT_ENDPOINT
  • DEPLOYMENTS - a space separated list of deployments whose pods should be
    refreshed after a certificate save
  • SECRET_NAME - the name to save the secrets under
  • NAMESPACE - the namespace under which the secrets should be available
  • TYPE - the type of the secrets (default is Opaque)
  • CRON_FREQUENCY - the 5-part frequency of the cron job. Default is a random
    time in the range 0-59 0-23 1-27 * *
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ployst
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