Using SSL to protect connections to Quay Enterprise

This document assumes you have deployed Quay Enterprise as a single container.

Quay Enterprise will be configured with a self-signed certificate. A Certificate Authority (CA) is required.

Create a CA and sign a certificate

First, create a root CA:

$ openssl genrsa -out rootCA.key 2048
$ openssl req -x509 -new -nodes -key rootCA.key -sha256 -days 1024 -out rootCA.pem

Next, create the key and certificate that will be signed by the CA:

$ openssl genrsa -out ssl.key 2048

When creating the ssl.csr file it is important that the hostname of the server where QE is installed is used as the Common Name or QE will reject the configuration. In this demo environment QE is currently installed at

$ openssl req -new -key ssl.key -out ssl.csr

Country Name (2 letter code) [XX]:US
State or Province Name (full name) []:California
Locality Name (eg, city) [Default City]:SF
Organization Name (eg, company) [Default Company Ltd]:Demo Quay
Organizational Unit Name (eg, section) []:Demo Quay
Common Name (eg, your name or your server's hostname) []
Email Address []

Sign the certificate with the CA:

$ openssl x509 -req -in ssl.csr -CA rootCA.pem -CAkey rootCA.key -CAcreateserial -out ssl.cert -days 500 -sha256
Signature ok
subject=/C=US/ST=California/L=SF/O=Demo Quay/OU=Demo Quay/
Getting CA Private Key

Configuring Quay Enterprise to use the new certificate

The next step can be accomplished either in the QE superuser panel, or from the terminal.

To configure with the superuser GUI in QE

Set the Server Hostname to the appropriate value and check the Enable SSL:

Set server hostname

Upload the ssl.key and ssl.cert files.

Upload Certificate

Save the configuration. QE will automatically validate the SSL certificate.

Save and Check config

Restart the container:

Restart Container

To configure with the command line

By not using the web interface the configuration checking mechanism built into QE is unavailable. It is suggested to use the web interface if possible.

Copy the ssl.key and ssl.cert into the specified config directory.

Note: The certificate/key files must be named ssl.key and ssl.cert

$ ls
ssl.cert  ssl.key
$ scp ssl.* core@

core@lan-lab-7 ~ $ ls config/
config.yaml  ssl.cert  ssl.key

Modify the PREFERRED_URL_SCHEME: parameter in config.yaml from http to https


Restart the QE container:

$ docker ps
CONTAINER ID        IMAGE                     COMMAND                  CREATED             STATUS              PORTS                                                NAMES
eaf45a4aa12d        "/usr/bin/redis-serve"   22 hours ago        Up 22 hours>6379/tcp                               dreamy_ramanujan
cbe7b0fa39d8   "/sbin/my_init"          22 hours ago        Up About an hour>80/tcp,>443/tcp, 8443/tcp   fervent_ptolemy
705fe7311940        mysql:5.7                 "/ mysql"   23 hours ago        Up 22 hours>3306/tcp                               mysql

$ docker restart cbe7b0fa39d8

Test the secure connection

Confirm the configuration by visiting the URL from a browser:


"Your Connection is not secure" means the CA is not officially and publicly trusted, but confirms that SSL is functioning properly. Check Google for how to configure your operating system and browser to trust a certificate signed by your own CA.

Configuring Docker to Trust a Certificate Authority

Docker requires that custom certs be installed to /etc/docker/certs.d/ under a directory with the same name as the hostname private registry. It is also required for the cert to be called ca.crt

Copying the rootCA file.

$ cp tmp/rootCA.pem /etc/docker/certs.d/`

After this step is completed docker login should authenticate successfully and pushing to the repository should succeed.

$ sudo docker push
The push refers to a repository []
5f70bf18a086: Layer already exists
e493e9cb9dac: Pushed
1770dbc4af14: Pushed
a7bb4eb71da7: Pushed
9fad7adcbd46: Pushed
2cec07a74a9f: Pushed
f342e0a3e445: Pushed
b12f995330bb: Pushed
2016366cdd69: Pushed
a930437ab3a5: Pushed
15eb0f73cd14: Pushed
latest: digest: sha256:c24be6d92b0a4e2bb8a8cc7c9bd044278d6abdf31534729b1660a485b1cd315c size: 7864