Wide range of supported resources

Occopus supports a wide variety of interfaces for allocating cloud or container resources. Some of the most widespread supported interfaces are ec2, nova, docker and occi. The list of supported interfaces is growing due to the modular and extensible feature of Occopus.

Hybrid cloud support

Occopus can deploy your infrastucture by allocating each node on a different cloud. Multiple type of clouds can be used within the same infrastructure, therefore we call it hybrid cloud support. It is also possible to let Occopus dynamically choose between a given list of clouds at deployment time. To use multiple resources, nodes must have multiple implementations and optionally implementations can be filtered in the infrastructure description.

Multiple configuration management support

Occopus can utilise Chef, Cloud-init, pre-defined images, or any combination of these in the same infrastructure. Occopus has access to various configuration and contextualization methods:

Different usage possibilities

Occopus functionalities can be utilised in different ways. First, it provides command-line tools exposing different functionalities to build, query, update or destroy infrastructures. Second, REST API can be used after Occopus web service has been launched. Finally, orchestration functionalities can be utilised in your application through the API of the Occopus python library.

Simple YAML format

Occopus uses YAML files for node definitions and infrastructure descriptions, making them simple, human-readable and easy-to-learn.

Schema checking

Both, infra description and node definition files are analysed and validated by Occopus by searching for missing or invalid sections and attributes. This helps users to avoid creating syntactically wrong descriptor files.

Dynamic reconfiguration

Make changes to your infrastructures on the fly with a single command. Modify the infrastructure description file the way you want - add and remove nodes, set new paramateres (e.g. scaling) and variables for your nodes and your infrastructure and modify the dependency graph as you wish. After updating the infrastructure description in the datastore using occopus-build command, Occopus will automatically reconfigure the nodes of running infrastructures to match the new definitions.

Health checking

Occopus supports health checking primitives to check if a node is still operating. These primitives are network availability of the node (ping), checking the connectivity of a certain port (port access), checking the responsiveness of a web service (url checking) or checking the connectivity of a mysql database (mysql access).

Auto healing

Occopus monitors the states of the nodes by applying the primitives configured by health-checking for each node. Once, a node does not fails on health-checking, it is considered as fail node, Occopus destroys and rebuilds it.

Manual scaling

Scaling up or down any nodes in the infrastructure is supported. Occopus can launch multiple instances of a certain node, however the infrastructure itself must be built in a way to handle scaling events.

Multiple node implementations

Occopus supports defining multiple implementations for a node (type) and utilise different backends, images, tools and variables in them. You can filter the available implementations in the infrastructure description, and occopus will select an implementation from the remaining ones.

Multiple authenticators

Occopus can handle multiple authenticators during building an infrastructure on multiple resource. Multiple resources may have different authenticators and authentication procedures. Occopus supports defining authenticators and selecting one of them for a certain resource. The selection can be based on any parameter of a resource handler, including name, type, image-id, etc.

Extensible architecture

Occopus was created with extensibility and flexibility in mind - New modules for resource-handlers, configuration-managers, additional schema-checker rules or health-checking primitives can easily be implemented and added without modifying other components.