Chapter 4. Using SSL to protect connections to Red Hat Quay 4.1. Using SSL/TLS To configure Red Hat Quay with a self-signed certificate, you must create a Certificate Authority (CA) and a primary key file named ssl.cert and ssl.key . 4.2. Creating a Certificate Authority Use the following procedure to set up your own CA and use it to issue a server certificate for your domain. This allows you to secure communications with SSL/TLS using your own certificates. Procedure Generate the root CA key by entering the following command: USD openssl genrsa -out rootCA.key 2048 Generate the root CA certificate by entering the following command: USD openssl req -x509 -new -nodes -key rootCA.key -sha256 -days 1024 -out rootCA.pem Enter the information that will be incorporated into your certificate request, including the server hostname, for example: Country Name (2 letter code) [XX]:IE State or Province Name (full name) []:GALWAY Locality Name (eg, city) [Default City]:GALWAY Organization Name (eg, company) [Default Company Ltd]:QUAY Organizational Unit Name (eg, section) []:DOCS Common Name (eg, your name or your server's hostname) []:quay-server.example.com Generate the server key by entering the following command: USD openssl genrsa -out ssl.key 2048 Generate a signing request by entering the following command: USD openssl req -new -key ssl.key -out ssl.csr Enter the information that will be incorporated into your certificate request, including the server hostname, for example: Country Name (2 letter code) [XX]:IE State or Province Name (full name) []:GALWAY Locality Name (eg, city) [Default City]:GALWAY Organization Name (eg, company) [Default Company Ltd]:QUAY Organizational Unit Name (eg, section) []:DOCS Common Name (eg, your name or your server's hostname) []:quay-server.example.com Email Address []: Create a configuration file openssl.cnf , specifying the server hostname, for example: Example openssl.cnf file [req] req_extensions = v3_req distinguished_name = req_distinguished_name [req_distinguished_name] [ v3_req ] basicConstraints = CA:FALSE keyUsage = nonRepudiation, digitalSignature, keyEncipherment subjectAltName = @alt_names [alt_names] DNS.1 = <quay-server.example.com> IP.1 = 192.168.1.112 Use the configuration file to generate the certificate ssl.cert : USD openssl x509 -req -in ssl.csr -CA rootCA.pem -CAkey rootCA.key -CAcreateserial -out ssl.cert -days 356 -extensions v3_req -extfile openssl.cnf Confirm your created certificates and files by entering the following command: USD ls /path/to/certificates Example output rootCA.key ssl-bundle.cert ssl.key custom-ssl-config-bundle-secret.yaml rootCA.pem ssl.cert openssl.cnf rootCA.srl ssl.csr 4.3. Configuring custom SSL/TLS certificates by using the command line interface SSL/TLS must be configured by using the command-line interface (CLI) and updating your config.yaml file manually. Prerequisites You have created a certificate authority and signed the certificate. Procedure Copy the certificate file and primary key file to your configuration directory, ensuring they are named ssl.cert and ssl.key respectively: cp ~/ssl.cert ~/ssl.key /path/to/configuration_directory Navigate to the configuration directory by entering the following command: USD cd /path/to/configuration_directory Edit the config.yaml file and specify that you want Red Hat Quay to handle SSL/TLS: Example config.yaml file # ... SERVER_HOSTNAME: <quay-server.example.com> ... PREFERRED_URL_SCHEME: https # ... Optional: Append the contents of the rootCA.pem file to the end of the ssl.cert file by entering the following command: USD cat rootCA.pem >> ssl.cert Stop the Quay container by entering the following command: USD sudo podman stop <quay_container_name> Restart the registry by entering the following command: 4.4. Configuring SSL/TLS using the Red Hat Quay UI Use the following procedure to configure SSL/TLS using the Red Hat Quay UI. To configure SSL/TLS using the command line interface, see "Configuring SSL/TLS using the command line interface". Prerequisites You have created a certificate authority and signed a certificate. Procedure Start the Quay container in configuration mode: In the Server Configuration section, select Red Hat Quay handles TLS for SSL/TLS. Upload the certificate file and private key file created earlier, ensuring that the Server Hostname matches the value used when the certificates were created. Validate and download the updated configuration. Stop the Quay container and then restart the registry by entering the following command: 4.5. Testing the SSL/TLS configuration using the CLI Your SSL/TLS configuration can be tested by using the command-line interface (CLI). Use the following procedure to test your SSL/TLS configuration. Use the following procedure to test your SSL/TLS configuration using the CLI. Procedure Enter the following command to attempt to log in to the Red Hat Quay registry with SSL/TLS enabled: USD sudo podman login quay-server.example.com Example output Error: error authenticating creds for "quay-server.example.com": error pinging docker registry quay-server.example.com: Get "https://quay-server.example.com/v2/": x509: certificate signed by unknown authority Because Podman does not trust self-signed certificates, you must use the --tls-verify=false option: USD sudo podman login --tls-verify=false quay-server.example.com Example output Login Succeeded! In a subsequent section, you will configure Podman to trust the root Certificate Authority. 4.6. Testing the SSL/TLS configuration using a browser Use the following procedure to test your SSL/TLS configuration using a browser. Procedure Navigate to your Red Hat Quay registry endpoint, for example, https://quay-server.example.com . If configured correctly, the browser warns of the potential risk: Proceed to the log in screen. The browser notifies you that the connection is not secure. For example: In the following section, you will configure Podman to trust the root Certificate Authority. 4.7. Configuring Podman to trust the Certificate Authority Podman uses two paths to locate the Certificate Authority (CA) file: /etc/containers/certs.d/ and /etc/docker/certs.d/ . Use the following procedure to configure Podman to trust the CA. Procedure Copy the root CA file to one of /etc/containers/certs.d/ or /etc/docker/certs.d/ . Use the exact path determined by the server hostname, and name the file ca.crt : USD sudo cp rootCA.pem /etc/containers/certs.d/quay-server.example.com/ca.crt Verify that you no longer need to use the --tls-verify=false option when logging in to your Red Hat Quay registry: USD sudo podman login quay-server.example.com Example output Login Succeeded! 4.8. Configuring the system to trust the certificate authority Use the following procedure to configure your system to trust the certificate authority. Procedure Enter the following command to copy the rootCA.pem file to the consolidated system-wide trust store: USD sudo cp rootCA.pem /etc/pki/ca-trust/source/anchors/ Enter the following command to update the system-wide trust store configuration: USD sudo update-ca-trust extract Optional. You can use the trust list command to ensure that the Quay server has been configured: USD trust list | grep quay label: quay-server.example.com Now, when you browse to the registry at https://quay-server.example.com , the lock icon shows that the connection is secure: To remove the rootCA.pem file from system-wide trust, delete the file and update the configuration: USD sudo rm /etc/pki/ca-trust/source/anchors/rootCA.pem USD sudo update-ca-trust extract USD trust list | grep quay More information can be found in the RHEL 9 documentation in the chapter Using shared system certificates .

Commands:
openssl genrsa -out rootCA.key 2048
openssl req -x509 -new -nodes -key rootCA.key -sha256 -days 1024 -out rootCA.pem
Country Name (2 letter code) [XX]:IE State or Province Name (full name) []:GALWAY Locality Name (eg, city) [Default City]:GALWAY Organization Name (eg, company) [Default Company Ltd]:QUAY Organizational Unit Name (eg, section) []:DOCS Common Name (eg, your name or your server's hostname) []:quay-server.example.com
openssl genrsa -out ssl.key 2048
openssl req -new -key ssl.key -out ssl.csr
Country Name (2 letter code) [XX]:IE State or Province Name (full name) []:GALWAY Locality Name (eg, city) [Default City]:GALWAY Organization Name (eg, company) [Default Company Ltd]:QUAY Organizational Unit Name (eg, section) []:DOCS Common Name (eg, your name or your server's hostname) []:quay-server.example.com Email Address []:
[req] req_extensions = v3_req distinguished_name = req_distinguished_name [req_distinguished_name] [ v3_req ] basicConstraints = CA:FALSE keyUsage = nonRepudiation, digitalSignature, keyEncipherment subjectAltName = @alt_names [alt_names] DNS.1 = <quay-server.example.com> IP.1 = 192.168.1.112
openssl x509 -req -in ssl.csr -CA rootCA.pem -CAkey rootCA.key -CAcreateserial -out ssl.cert -days 356 -extensions v3_req -extfile openssl.cnf
ls /path/to/certificates
rootCA.key ssl-bundle.cert ssl.key custom-ssl-config-bundle-secret.yaml rootCA.pem ssl.cert openssl.cnf rootCA.srl ssl.csr
cp ~/ssl.cert ~/ssl.key /path/to/configuration_directory
cd /path/to/configuration_directory
SERVER_HOSTNAME: <quay-server.example.com> PREFERRED_URL_SCHEME: https
cat rootCA.pem >> ssl.cert
sudo podman stop <quay_container_name>
sudo podman run -d --rm -p 80:8080 -p 443:8443 --name=quay -v USDQUAY/config:/conf/stack:Z -v USDQUAY/storage:/datastorage:Z registry.redhat.io/quay/quay-rhel8:v3.13.3
sudo podman run --rm -it --name quay_config -p 80:8080 -p 443:8443 registry.redhat.io/quay/quay-rhel8:v3.13.3 config secret
sudo podman rm -f quay sudo podman run -d --rm -p 80:8080 -p 443:8443 --name=quay -v USDQUAY/config:/conf/stack:Z -v USDQUAY/storage:/datastorage:Z registry.redhat.io/quay/quay-rhel8:v3.13.3
sudo podman login quay-server.example.com
Error: error authenticating creds for "quay-server.example.com": error pinging docker registry quay-server.example.com: Get "https://quay-server.example.com/v2/": x509: certificate signed by unknown authority
sudo podman login --tls-verify=false quay-server.example.com
Login Succeeded!
sudo cp rootCA.pem /etc/containers/certs.d/quay-server.example.com/ca.crt
sudo podman login quay-server.example.com
Login Succeeded!
sudo cp rootCA.pem /etc/pki/ca-trust/source/anchors/
sudo update-ca-trust extract
trust list | grep quay label: quay-server.example.com
sudo rm /etc/pki/ca-trust/source/anchors/rootCA.pem
sudo update-ca-trust extract
trust list | grep quay