4a1fa67f26
I apologize in advance for the rather long PR, but unfortunately there is not an easy way to break this up into smaller chunks. This separates the agent configuration into smaller, more consumable pieces just like the job specification.
38 lines
1.8 KiB
Markdown
38 lines
1.8 KiB
Markdown
---
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layout: "docs"
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page_title: "Frequently Asked Questions"
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sidebar_current: "docs-faq"
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description: |-
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Frequently asked questions and answers for Nomad
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---
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# Frequently Asked Questions
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## Q: What is Checkpoint? / Does Nomad call home?
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Nomad makes use of a HashiCorp service called [Checkpoint](https://checkpoint.hashicorp.com)
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which is used to check for updates and critical security bulletins.
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Only anonymous information, which cannot be used to identify the user or host, is
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sent to Checkpoint. An anonymous ID is sent which helps de-duplicate warning messages.
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This anonymous ID can can be disabled. Using the Checkpoint service is optional and can be disabled.
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See [`disable_anonymous_signature`](/docs/agent/configuration/index.html#disable_anonymous_signature)
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and [`disable_update_check`](/docs/agent/configuration/index.html#disable_update_check).
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## Q: How does Atlas integration work?
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Nomad makes use of a HashiCorp service called [SCADA](http://scada.hashicorp.com)
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(Supervisory Control And Data Acquisition). The SCADA system allows clients to maintain
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long-running connections to Atlas. Atlas can in turn provide auto-join facilities for
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Nomad agents (supervisory control) and a dashboard showing the state of the system (data acquisition).
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Using the SCADA service is optional. SCADA is only enabled by opt-in.
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## Q: Is Nomad eventually or strongly consistent?
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Nomad makes use of both a [consensus protocol](/docs/internals/consensus.html) and
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a [gossip protocol](/docs/internals/gossip.html). The consensus protocol is strongly
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consistent, and is used for all state replication and scheduling. The gossip protocol
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is used to manage the addresses of servers for automatic clustering and multi-region
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federation. This means all data that is managed by Nomad is strongly consistent.
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