This documentation is for a release that is no longer maintained
See documentation for the latest supported version 3 or the latest supported version 4.1.2. Operator Framework glossary of common terms
This topic provides a glossary of common terms related to the Operator Framework, including Operator Lifecycle Manager (OLM) and the Operator SDK, for both packaging formats: Package Manifest Format and Bundle Format.
1.2.1. Common Operator Framework terms 复制链接链接已复制到粘贴板!
1.2.1.1. Bundle 复制链接链接已复制到粘贴板!
In the Bundle Format, a bundle is a collection of an Operator CSV, manifests, and metadata. Together, they form a unique version of an Operator that can be installed onto the cluster.
1.2.1.2. Bundle image 复制链接链接已复制到粘贴板!
In the Bundle Format, a bundle image is a container image that is built from Operator manifests and that contains one bundle. Bundle images are stored and distributed by Open Container Initiative (OCI) spec container registries, such as Quay.io or DockerHub.
1.2.1.3. Catalog source 复制链接链接已复制到粘贴板!
A catalog source is a repository of CSVs, CRDs, and packages that define an application.
1.2.1.4. Catalog image 复制链接链接已复制到粘贴板!
In the Package Manifest Format, a catalog image is a containerized datastore that describes a set of Operator metadata and update metadata that can be installed onto a cluster using OLM.
1.2.1.5. Channel 复制链接链接已复制到粘贴板!
A channel defines a stream of updates for an Operator and is used to roll out updates for subscribers. The head points to the latest version of that channel. For example, a stable
channel would have all stable versions of an Operator arranged from the earliest to the latest.
An Operator can have several channels, and a subscription binding to a certain channel would only look for updates in that channel.
1.2.1.6. Channel head 复制链接链接已复制到粘贴板!
A channel head refers to the latest known update in a particular channel.
1.2.1.7. Cluster service version 复制链接链接已复制到粘贴板!
A cluster service version (CSV) is a YAML manifest created from Operator metadata that assists OLM in running the Operator in a cluster. It is the metadata that accompanies an Operator container image, used to populate user interfaces with information such as its logo, description, and version.
It is also a source of technical information that is required to run the Operator, like the RBAC rules it requires and which custom resources (CRs) it manages or depends on.
1.2.1.8. Dependency 复制链接链接已复制到粘贴板!
An Operator may have a dependency on another Operator being present in the cluster. For example, the Vault Operator has a dependency on the etcd Operator for its data persistence layer.
OLM resolves dependencies by ensuring that all specified versions of Operators and CRDs are installed on the cluster during the installation phase. This dependency is resolved by finding and installing an Operator in a catalog that satisfies the required CRD API, and is not related to packages or bundles.
1.2.1.9. Index image 复制链接链接已复制到粘贴板!
In the Bundle Format, an index image refers to an image of a database (a database snapshot) that contains information about Operator bundles including CSVs and CRDs of all versions. This index can host a history of Operators on a cluster and be maintained by adding or removing Operators using the opm
CLI tool.
1.2.1.10. Install plan 复制链接链接已复制到粘贴板!
An install plan is a calculated list of resources to be created to automatically install or upgrade a CSV.
1.2.1.11. Operator group 复制链接链接已复制到粘贴板!
An Operator group configures all Operators deployed in the same namespace as the OperatorGroup
object to watch for their CR in a list of namespaces or cluster-wide.
1.2.1.12. Package 复制链接链接已复制到粘贴板!
In the Bundle Format, a package is a directory that encloses all released history of an Operator with each version. A released version of an Operator is described in a CSV manifest alongside the CRDs.
1.2.1.13. Registry 复制链接链接已复制到粘贴板!
A registry is a database that stores bundle images of Operators, each with all of its latest and historical versions in all channels.
1.2.1.14. Subscription 复制链接链接已复制到粘贴板!
A subscription keeps CSVs up to date by tracking a channel in a package.
1.2.1.15. Update graph 复制链接链接已复制到粘贴板!
An update graph links versions of CSVs together, similar to the update graph of any other packaged software. Operators can be installed sequentially, or certain versions can be skipped. The update graph is expected to grow only at the head with newer versions being added.