19 lines
3.5 KiB
Markdown
19 lines
3.5 KiB
Markdown
# Terminology
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## Cluster Terms
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| Phrase | Definition |
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| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| agent | A process running in server or client mode. |
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| client/node | A Nomad client is responsible for running tasks assigned to it. A client registers itself with servers and watches for work to be assigned. When running the agent, the client may be referred to as a *node*. |
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| server | A Nomad server manages all jobs and clients, monitors tasks, and controls which tasks get placed on which nodes. |
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| dev_agent | The development agent is an agent configuration that provides useful defaults for running a single node cluster of nomad. |
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## Work terms
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| Phrase | Definition |
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| ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| task | The smallest unit of work in Nomad. Tasks are executed by task drivers like `docker` or `exec`, which allows Nomad to be flexible in the types of tasks it supports. Tasks specify their required task driver, configuration for the driver, constraints, and resources required. |
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| group | A series of tasks that run on the same Nomad client. |
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| job | The core unit of *control* for Nomad and defines the application and its configuration. It can contain one or many tasks |
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| job_specification/jobspec | A job specification, also known as a jobspec. |
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| allocation | An allocation is a mapping between a task group in a job and a client node. When a job is run, Nomad will chose a client capable of running it and allocates resources on the machine for the ask(s) in the task group defined for the job. |
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