new book manual

collections/manual/documentation/developers/internals/zos/internals/provision/readme.md

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+<h1>Provision Module</h1>
+
+<h2> Table of Contents </h2>
+
+- [ZBus](#zbus)
+- [Introduction](#introduction)
+- [Supported workload](#supported-workload)
+
+
+***
+
+## ZBus
+
+This module is autonomous module and is not reachable over `zbus`.
+
+## Introduction
+
+This module is responsible to provision/decommission workload on the node.
+
+It accepts new deployment over `rmb` and tries to bring them to reality by running a series of provisioning workflows based on the workload `type`.
+
+`provisiond` knows about all available daemons and it contacts them over `zbus` to ask for the needed services. The pull everything together and update the deployment with the workload state.
+
+If node was restarted, `provisiond` tries to bring all active workloads back to original state.
+## Supported workload
+
+0-OS currently support 8 type of workloads:
+- network
+- `zmachine` (virtual machine)
+- `zmount` (disk): usable only by a `zmachine`
+- `public-ip` (v4 and/or v6): usable only by a `zmachine`
+- [`zdb`](https://github.com/threefoldtech/0-DB) `namespace`
+- [`qsfs`](https://github.com/threefoldtech/quantum-storage)
+- `zlogs`
+- `gateway`