This release includes additional `ipfs-cluster-service state` subcommands and the connectivity graph feature.
* Features
*`ipfs-cluster-service daemon --upgrade` allows to automatically run migrations before starting | [ipfs/ipfs-cluster#300](https://github.com/ipfs/ipfs-cluster/issues/300) | [ipfs/ipfs-cluster#307](https://github.com/ipfs/ipfs-cluster/issues/307)
*`ipfs-cluster-service state version` reports the shared state format version | [ipfs/ipfs-cluster#298](https://github.com/ipfs/ipfs-cluster/issues/298) | [ipfs/ipfs-cluster#307](https://github.com/ipfs/ipfs-cluster/issues/307)
*`ipfs-cluster-service health graph` generates a .dot graph file of cluster connectivity | [ipfs/ipfs-cluster#17](https://github.com/ipfs/ipfs-cluster/issues/17) | [ipfs/ipfs-cluster#291](https://github.com/ipfs/ipfs-cluster/issues/291) | [ipfs/ipfs-cluster#311](https://github.com/ipfs/ipfs-cluster/issues/311)
* Bugfixes
* Do not upgrade state if already up to date | [ipfs/ipfs-cluster#296](https://github.com/ipfs/ipfs-cluster/issues/296) | [ipfs/ipfs-cluster#307](https://github.com/ipfs/ipfs-cluster/issues/307)
* Commands to export and import the internal cluster state: these allow to perform easy and human-readable dumps of the shared cluster state while offline, and eventually restore it in a different peer or cluster.
* The introduction of `replication_factor_min` and `replication_factor_max` parameters for every Pin (along with the deprecation of `replication_factor`). The defaults are specified in the configuration. For more information on the usage and behavour of these new options, check the IPFS cluster guide.
* Features
* New `ipfs-cluster-service state export/import/cleanup` commands | [ipfs/ipfs-cluster#240](https://github.com/ipfs/ipfs-cluster/issues/240) | [ipfs/ipfs-cluster#290](https://github.com/ipfs/ipfs-cluster/issues/290)
* New min/max replication factor control | [ipfs/ipfs-cluster#277](https://github.com/ipfs/ipfs-cluster/issues/277) | [ipfs/ipfs-cluster#292](https://github.com/ipfs/ipfs-cluster/issues/292)
*`ipfs-cluster-service version` output simplified (see below) | [ipfs/ipfs-cluster#274](https://github.com/ipfs/ipfs-cluster/issues/274)
* Testing improvements:
* Added tests for Dockerfiles | [ipfs/ipfs-cluster#200](https://github.com/ipfs/ipfs-cluster/issues/200) | [ipfs/ipfs-cluster#282](https://github.com/ipfs/ipfs-cluster/issues/282)
* Enabled Jenkins testing and made it work | [ipfs/ipfs-cluster#256](https://github.com/ipfs/ipfs-cluster/issues/256) | [ipfs/ipfs-cluster#294](https://github.com/ipfs/ipfs-cluster/issues/294)
* Documentation improvements:
* Guide contains more details on state upgrade procedures | [ipfs/ipfs-cluster#270](https://github.com/ipfs/ipfs-cluster/issues/270)
* ipfs-cluster-ctl exit status are documented on the README | [ipfs/ipfs-cluster#178](https://github.com/ipfs/ipfs-cluster/issues/178)
* Bugfixes
* Force cleanup after sharness tests | [ipfs/ipfs-cluster#181](https://github.com/ipfs/ipfs-cluster/issues/181) | [ipfs/ipfs-cluster#288](https://github.com/ipfs/ipfs-cluster/issues/288)
* Fix state version validation on start | [ipfs/ipfs-cluster#293](https://github.com/ipfs/ipfs-cluster/issues/293)
* Wait until last index is applied before attempting snapshot on shutdown | [ipfs/ipfs-cluster#275](https://github.com/ipfs/ipfs-cluster/issues/275)
* Snaps from master not pushed due to bad credentials
* Fix overpinning or underpinning of CIDs after re-join | [ipfs/ipfs-cluster#222](https://github.com/ipfs/ipfs-cluster/issues/222)
* Fix unmarshaling state on top of an existing one | [ipfs/ipfs-cluster#297](https://github.com/ipfs/ipfs-cluster/issues/297)
* Fix catching up on imported state | [ipfs/ipfs-cluster#297](https://github.com/ipfs/ipfs-cluster/issues/297)
These release is compatible with previous versions of ipfs-cluster on the API level, with the exception of the `ipfs-cluster-service version` command, which returns `x.x.x-shortcommit` rather than `ipfs-cluster-service version 0.3.1`. The former output is still available as `ipfs-cluster-service --version`.
The `replication_factor` option is deprecated, but still supported and will serve as a shortcut to set both `replication_factor_min` and `replication_factor_max` to the same value. This affects the configuration file, the REST API and the `ipfs-cluster-ctl pin add` command.
This release includes changes around the consensus state management, so that upgrades can be performed when the internal format changes. It also comes with several features and changes to support a live deployment and integration with IPFS pin-bot, including a REST API client for Go.
* Features
*`ipfs-cluster-service state upgrade` | [ipfs/ipfs-cluster#194](https://github.com/ipfs/ipfs-cluster/issues/194)
*`ipfs-cluster-test` Docker image runs with `ipfs:master` | [ipfs/ipfs-cluster#155](https://github.com/ipfs/ipfs-cluster/issues/155) | [ipfs/ipfs-cluster#259](https://github.com/ipfs/ipfs-cluster/issues/259)
*`ipfs-cluster` Docker image only runs `ipfs-cluster-service` (and not the ipfs daemon anymore) | [ipfs/ipfs-cluster#197](https://github.com/ipfs/ipfs-cluster/issues/197) | [ipfs/ipfs-cluster#155](https://github.com/ipfs/ipfs-cluster/issues/155) | [ipfs/ipfs-cluster#259](https://github.com/ipfs/ipfs-cluster/issues/259)
* Support for DNS multiaddresses for cluster peers | [ipfs/ipfs-cluster#155](https://github.com/ipfs/ipfs-cluster/issues/155) | [ipfs/ipfs-cluster#259](https://github.com/ipfs/ipfs-cluster/issues/259)
* Add configuration section and options for `pin_tracker` | [ipfs/ipfs-cluster#155](https://github.com/ipfs/ipfs-cluster/issues/155) | [ipfs/ipfs-cluster#259](https://github.com/ipfs/ipfs-cluster/issues/259)
* Add `local` flag to Status, Sync, Recover endpoints which allows to run this operations only in the peer receiving the request | [ipfs/ipfs-cluster#155](https://github.com/ipfs/ipfs-cluster/issues/155) | [ipfs/ipfs-cluster#259](https://github.com/ipfs/ipfs-cluster/issues/259)
* New REST API Client module `github.com/ipfs/ipfs-cluster/api/rest/client` allows to integrate against cluster | [ipfs/ipfs-cluster#260](https://github.com/ipfs/ipfs-cluster/issues/260) | [ipfs/ipfs-cluster#263](https://github.com/ipfs/ipfs-cluster/issues/263) | [ipfs/ipfs-cluster#266](https://github.com/ipfs/ipfs-cluster/issues/266)
* A few rounds addressing code quality issues | [ipfs/ipfs-cluster#264](https://github.com/ipfs/ipfs-cluster/issues/264)
This release should stay backwards compatible with the previous one. Nevertheless, some REST API endpoints take the `local` flag, and matching new Go public functions have been added (`RecoverAllLocal`, `SyncAllLocal`...).
* Multiple minor fixes | [ipfs/ipfs-cluster#236](https://github.com/ipfs/ipfs-cluster/issues/236)
* Avoid shutting down consensus in the middle of a commit
* Return an ID containing current peers in PeerAdd
* Do not shut down libp2p host in the middle of peer removal
* Send cluster addresses to the new peer before adding it
* Wait for configuration save on init
* Fix error message when not enough allocations exist for a pin
This releases introduces some changes affecting the configuration file and some breaking changes affecting `go` and the REST APIs:
* The `consensus.raft` section of the configuration has new options but should be backwards compatible.
* The `Consensus` component interface has changed, `LogAddPeer` and `LogRmPeer` have been replaced by `AddPeer` and `RmPeer`. It additionally provides `Clean` and `Peers` methods. The `consensus/raft` implementation has been updated accordingly.
* The `api.ID` (used in REST API among others) object key `ClusterPeers` key is now a list of peer IDs, and not a list of multiaddresses as before. The object includes a new key `ClusterPeersAddresses` which includes the multiaddresses.
* Note that `--bootstrap` and `--leave` flags when calling `ipfs-cluster-service` will be stored permanently in the configuration (see [ipfs/ipfs-cluster#235](https://github.com/ipfs/ipfs-cluster/issues/235)).
* Peers and bootstrap entries in the configuration are ignored | [ipfs/ipfs-cluster#203](https://github.com/ipfs/ipfs-cluster/issues/203) | [ipfs/ipfs-cluster#204](https://github.com/ipfs/ipfs-cluster/issues/204)
* Informers do not work on 32-bit architectures | [ipfs/ipfs-cluster#202](https://github.com/ipfs/ipfs-cluster/issues/202) | [ipfs/ipfs-cluster#205](https://github.com/ipfs/ipfs-cluster/issues/205)
* Replication factor entry in the configuration is ignored | [ipfs/ipfs-cluster#208](https://github.com/ipfs/ipfs-cluster/issues/208) | [ipfs/ipfs-cluster#209](https://github.com/ipfs/ipfs-cluster/issues/209)
The fix for 32-bit architectures has required a change in the `IPFSConnector` interface (`FreeSpace()` and `Reposize()` return `uint64` now). The current implementation by the `ipfshttp` module has changed accordingly.
* Basic authentication support added to API component | [ipfs/ipfs-cluster#121](https://github.com/ipfs/ipfs-cluster/issues/121) | [ipfs/ipfs-cluster#147](https://github.com/ipfs/ipfs-cluster/issues/147) | [ipfs/ipfs-cluster#179](https://github.com/ipfs/ipfs-cluster/issues/179)
* Copy peers to bootstrap when leaving a cluster | [ipfs/ipfs-cluster#170](https://github.com/ipfs/ipfs-cluster/issues/170) | [ipfs/ipfs-cluster#112](https://github.com/ipfs/ipfs-cluster/issues/112)
* New configuration format | [ipfs/ipfs-cluster#162](https://github.com/ipfs/ipfs-cluster/issues/162) | [ipfs/ipfs-cluster#177](https://github.com/ipfs/ipfs-cluster/issues/177)
* Freespace disk metric implementation. It's now the default. | [ipfs/ipfs-cluster#142](https://github.com/ipfs/ipfs-cluster/issues/142) | [ipfs/ipfs-cluster#99](https://github.com/ipfs/ipfs-cluster/issues/99)
* Fixes:
* IPFS Connector should use only POST | [ipfs/ipfs-cluster#176](https://github.com/ipfs/ipfs-cluster/issues/176) | [ipfs/ipfs-cluster#161](https://github.com/ipfs/ipfs-cluster/issues/161)
*`ipfs-cluster-ctl` exit status with error responses | [ipfs/ipfs-cluster#174](https://github.com/ipfs/ipfs-cluster/issues/174)
* Sharness tests and update testing container | [ipfs/ipfs-cluster#171](https://github.com/ipfs/ipfs-cluster/issues/171)
*`ipfs-cluster-service`: Do not run service with unknown subcommands | [ipfs/ipfs-cluster#186](https://github.com/ipfs/ipfs-cluster/issues/186)
This release introduces some breaking changes affecting configuration files and `go` integrations:
* Config: The old configuration format is no longer valid and cluster will fail to start from it. Configuration file needs to be re-initialized with `ipfs-cluster-service init`.
* Go: The `restapi` component has been renamed to `rest` and some of its public methods have been renamed.
* Go: Initializers (`New<Component>(...)`) for most components have changed to accept a `Config` object. Some initializers have been removed.
