You must ensure that the cluster has access to the Docker Container
Repository in order to retrieve the container images for deployment.
There are several types of Docker Repositories you can use:
Embedded Repository
During installation, a Docker daemon is provisioned to act as the
Repository. Passwords and certificates are auto generated. No
additional set up is needed. Images are copied to the repository
during installation. During upgrades, only the new and changed images
are copied. Copying images generally takes one to two hours.
It is important to note that the Embedded Repository can be a single
point of failure. If the node that runs the Docker Repository fails or
becomes unavailable, some cluster functionalities might become
unavailable. Moving the Docker Repository to another node is a complex
process and will require engaging Cloudera Professional Services.
Cloudera Repository
Using the Cloudera Repository requires that the cluster have
internet connectivity to the Cloudera public repository. Using the
Cloudera Repository is the fastest option.
The Cloudera-hosted Docker Repository option may increase the time
required to deploy or start the services in the cluster. Cloudera
generates Docker Repository credentials that are identical to your
paywall credentials. Refer to your welcome letter for the credentials
or use the credential generator on cloudera.com to generate credentials from your license key.
This option is best suited for proof-of-concept, non-production
deployments or deployments that do not have security requirements that
disallow internet access.
Custom Repository
A Custom Repository is a repository that you manage in your
environment and can be Enterprise grade and highly available.
During installation and upgrade, a custom script is generated that
you use to copy the images. Copying images can take 4 - 5 hours.
Only TLS-enabled custom Docker Registry is supported. Ensure that
you use a TLS certificate to secure the custom Docker Registry. The
TLS certificate can be self-signed, or signed by a private or public
trusted Certificate Authority (CA).
