SSL is a cryptographic protocol that provides end-to-end encryption and integrity for all web requests. Apps that transmit sensitive data should enable SSL to ensure all information is transmitted securely.
To enable SSL on a custom domain, e.g.,
www.example.com, use the SSL endpoint.
deis certs is only useful for custom domains. Default application domains are
SSL-enabled already and can be accessed simply by using https,
https://foo.deisapp.com (provided that you have installed your wildcard
certificate on the routers or on the load balancer).
Because of the unique nature of SSL validation, provisioning SSL for your domain is a multi-step process that involves several third-parties. You will need to:
Purchasing an SSL cert varies in cost and process depending on the vendor. RapidSSL offers a simple way to purchase a certificate and is a recommended solution. If you’re able to use this provider, see buy an SSL certificate with RapidSSL for instructions.
Once the SSL certificate is provisioned and your cert is confirmed, you must route requests for your domain through Deis. Unless you've already done so, add the domain specified when generating the CSR to your app with:
$ deis domains:add www.example.com -a foo Adding www.example.com to foo... done
Add your certificate, any intermediate certificates, and private key to the endpoint with the
$ deis certs:add example-com server.crt server.key Adding SSL endpoint... done www.example.com
The name given to the certificate can only contain a-z (lowercase), 0-9 and hyphens
The Deis platform will investigate the certificate and extract any relevant information from it such as the Common Name, Subject Alt Names (SAN), fingerprint and more.
This allows for wildcard certificates and multiple domains in the SAN without uploading duplicates.
Sometimes, your certificates (such as a self-signed or a cheap certificate) need additional certificates to establish the chain of trust. What you need to do is bundle all the certificates into one file and give that to Deis. Importantly, your site’s certificate must be the first one:
$ cat server.crt server.ca > server.bundle
After that, you can add them to Deis with the
$ deis certs:add example-com server.bundle server.key Adding SSL endpoint... done www.example.com
Certificates are not automagically connected up to domains, instead you will have to attach a certificate to a domain
$ deis certs:attach example-com example.com
Each certificate can be connected to many domains. There is no need to upload duplicates.
To remove an association
$ deis certs:detach example-com example.com
You can verify the details of your domain's SSL configuration with
$ deis certs Name | Common Name | SubjectAltName | Expires | Fingerprint | Domains | Updated | Created +-------------+-------------------+-------------------+-------------------------+-----------------+--------------+-------------+-------------+ example-com | example.com | blog.example.com | 31 Dec 2017 (in 1 year) | 8F:8E[...]CD:EB | example.com | 30 Jan 2016 | 29 Jan 2016
or by looking at at each certificates detailed information
$ deis cert:info example-com === bar-com Certificate Common Name(s): example.com Expires At: 2017-01-14 23:57:57 +0000 UTC Starts At: 2016-01-15 23:57:57 +0000 UTC Fingerprint: 7A:CA:B8:50:FF:8D:EB:03:3D:AC:AD:13:4F:EE:03:D5:5D:EB:5E:37:51:8C:E0:98:F8:1B:36:2B:20:83:0D:C0 Subject Alt Name: blog.example.com Issuer: /C=US/ST=CA/L=San Francisco/O=Deis/OU=Engineering/CN=example.com/emailAddressemail@example.com Subject: /C=US/ST=CA/L=San Francisco/O=Deis/OU=Engineering/CN=example.com/emailAddressfirstname.lastname@example.org Connected Domains: example.com Owner: admin-user Created: 2016-01-28 19:07:41 +0000 UTC Updated: 2016-01-30 00:10:02 +0000 UTC
Use a command line utility like
curl to test that everything is configured correctly for your
The -k option flag tells curl to ignore untrusted certificates.
Pay attention to the output. It should print
SSL certificate verify ok. If it prints something
common name: www.example.com (does not match 'www.somedomain.com') then something is not
To enforce all HTTP requests be redirected to HTTPS, TLS can be enforced at the router level by running
$ deis tls:enable -a foo Enabling https-only requests for foo... done
Users hitting the HTTP endpoint for the application will now receive a 301 redirect to the HTTPS endpoint.
To disable enforced TLS, run
$ deis tls:disable -a foo Disabling https-only requests for foo... done
You can remove a certificate using the
$ deis certs:remove my-cert Removing www.example.com... Done.
Over the lifetime of an application an operator will have to acquire certificates with new expire dates and apply it to all relevant applications, below is the recommended way to swap out certificates.
Be intentional with certificate names, name them
example-com-2017 when possible, where the year
signifies the expiry year. This allows for
example-com-2018 when a new certificate is purchased.
Assuming all applications are already using
example-com-2017 the following commands can be ran,
chained together or otherwise:
$ deis certs:detach example-com-2017 example.com $ deis certs:attach example-com-2018 example.com
This will take care of a singular domain which allows the operator to verify everything went as planned and slowly roll it out to any other application using the same method.
Here are some steps you can follow if your SSL endpoint is not working as you'd expect.
In some cases when accessing the SSL endpoint, it may list your certificate as untrusted.
If this occurs, it may be because it is not trusted by Mozilla’s list of root CAs. If this is the case, your certificate may be considered untrusted for many browsers.
If you have uploaded a certificate that was signed by a root authority but you get the message that
it is not trusted, then something is wrong with the certificate. For example, it may be missing
intermediary certificates. If so, download the intermediary certificates from your SSL provider,
remove the certificate from Deis and re-run the