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Improve how node roles are assigned in Garage

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- change the terminology: the network configuration becomes the role
  table, the configuration of a nodes becomes a node's role
- the modification of the role table takes place in two steps: first,
  changes are staged in a CRDT data structure. Then, once the user is
  happy with the changes, they can commit them all at once (or revert
  them).
- update documentation
- fix tests
- implement smarter partition assignation algorithm

This patch breaks the format of the network configuration: when
migrating, the cluster will be in a state where no roles are assigned.
All roles must be re-assigned and commited at once. This migration
should not pose an issue.
This commit is contained in:
Alex Auvolat
2021-11-09 12:24:04 +01:00
parent 53888995bd
commit c94406f428
42 changed files with 1430 additions and 557 deletions
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doc/book/src/reference_manual/configuration.md
+2 -2
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@@ -133,9 +133,9 @@ These peer identifiers have the following syntax:
In the case where `rpc_public_addr` is correctly specified in the
configuration file, the full identifier of a node including IP and port can
be obtained by running `garage node-id` and then included directly in the
be obtained by running `garage node id` and then included directly in the
`bootstrap_peers` list of other nodes. Otherwise, only the node's public
key will be returned by `garage node-id` and you will have to add the IP
key will be returned by `garage node id` and you will have to add the IP
yourself.
#### `consul_host` and `consul_service_name`