github.com/defanghe/fabric@v2.1.1+incompatible/release_notes/v2.0.0-alpha.txt (about)

     1  v2.0.0-alpha Release Notes - April 9, 2019
     2  ------------------------------------------
     3  
     4  What's New in Hyperledger Fabric v2.0
     5  -------------------------------------
     6  
     7  The following major features are included in the v2.0.0 Alpha release:
     8  
     9  FAB-11237 - Improved chaincode lifecycle
    10  The Fabric 2.0 Alpha introduces decentralized governance for chaincode, with a
    11  new process for installing a chaincode on your peers and starting it on a
    12  channel. The new Fabric chaincode lifecycle allows multiple organizations to
    13  come to agreement on the parameters of a chaincode, such as the chaincode
    14  endorsement policy, before it can be used to interact with the ledger.
    15  
    16  FAB-11144 - Native token support
    17  The Fabric 2.0 Alpha provides users the ability to easily represent assets
    18  as tokens on Fabric channels. FabToken is a token management system that uses
    19  an Unspent Transaction Output (UTXO) model to issue, transfer, and redeem tokens
    20  using the identity and membership infrastructure provided by Hyperledger Fabric.
    21  A new 'token' command line interface is included as a way to drive token transactions
    22  without an application.
    23  
    24  FAB-6135 - Raft Consensus
    25  Introduced in v1.4.1 and v2.0.0 Alpha, the ordering service now provides
    26  an option to use the Raft Consensus algorithm. Raft is a crash fault tolerant
    27  (CFT) ordering service based on an implementation of Raft protocol in etcd.
    28  
    29  FAB-11096 - Docker images with Alpine Linux
    30  Hyperledger Fabric Docker images will now use Alpine Linux,
    31  a security-oriented, lightweight Linux distribution.
    32  
    33  New operational metrics and health checks
    34  FAB-13088 Endorser metrics
    35  FAB-14077 Orderer communication metrics
    36  FAB-11937 Raft metrics
    37  FAB-13237 Metrics for log records
    38  FAB-12727 Gossip metrics
    39  FAB-13341 Kafka health check
    40  FAB-12908 CouchDB health check
    41  
    42  Changes, Known Issues, and Workarounds
    43  --------------------------------------
    44  
    45  FAB-11237 - Improved chaincode lifecycle
    46  The new Fabric chaincode lifecycle in the v2.0.0 Alpha release is not yet feature
    47  complete. Specifically, be aware of the following limitations in the Alpha release:
    48  - CouchDB indexes are not yet supported
    49  - Chaincodes defined with the new lifecycle are not yet discoverable via service discovery
    50  These limitations will be resolved after the Alpha release.
    51  
    52  
    53  FAB-11096 - Docker images with Alpine Linux
    54  Bash is no longer available in Fabric images. Utilize Alpine's built-in
    55  sh or ash instead.
    56  
    57  FAB-12075 - Duplicate Go Client identity library removed
    58  If vendoring the Client identity library (CID) in chaincode, import
    59  github.com/hyperledger/fabric/core/chaincode/shim/ext/cid
    60  rather than
    61  github.com/hyperledger/fabriccore/chaincode/lib/cid/cid.go
    62  
    63  FAB-12088 - Java chaincode support on s390x architecture
    64  Java chaincode support is not yet available on s390x architecture.
    65  
    66  FAB-12134 Same chaincode source receiving fingerprint mismatch error
    67  Chaincode installed in different ways may result in "chaincode fingerprint
    68  mismatch data mismatch" error upon instantiation.  This may happen when
    69  installing chaincode by using different SDKs. To workaround the problem,
    70  package the chaincode prior to installation and instantiation, by using
    71  the "peer chaincode package" command.
    72  
    73  Known Vulnerabilities
    74  ---------------------
    75  FAB-8664 - Peer should detect and react when its org has been removed
    76  This is a relatively low severity problem, because it requires a significant
    77  conspiracy of network admins, but it will be addressed in a future release.
    78  
    79  Resolved Vulnerabilities
    80  ------------------------
    81  None.
    82  
    83  Other improvements and fixes
    84  ----------------------------
    85  FAB-13471 - Fix for multiple chaincode upgrades in a single block
    86  FAB-14687 - Fix memory leak in gossip message store
    87  Updated to Go version 1.11.5
    88  Updated baseimage version to 0.4.15 for third party dependencies.
    89  
    90  For the full list of improvements and fixes, refer to the release change log:
    91  https://github.com/hyperledger/fabric/blob/master/CHANGELOG.md#v200-alpha