Kubernetes operators capture application domain knowledge into reusable code that drives the operations of the application. Juju offers model-driven operators, and extends the idea of operators beyond Kubernetes to traditional machine environments, for multi cloud and hybrid cloud application management.
What is an operator lifecycle manager?
Kubernetes operators are containers with operations code, that drive your applications on K8s. Juju is an operator lifecycle manager that manages the installation, integration and configuration of operators on the cluster. Juju also extends the idea of operators to traditional application management on Linux and Windows servers, or cloud instances.
Model-driven operations and integration
Organise your operators into models, which group together applications that can be tightly integrated on the same substrate and operated by the same team. Capture resource allocation, storage, networking and integration information in the model to simplify ongoing operations.
Better day-2 operations
Each operator code package, called a charm, declares methods for actions like back, restore, or security audit. Calling these methods provides remote administration of the application with no low-level access required.
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install Juju, simply use the following command: