peer node

管理员可以通过 peer node 命令来启动 Peer 节点，将节点中的所有通道重置为创世区块，或者将某个通道回滚到给定区块号。

语法

peer node 命令有如下子命令：

• start
• reset
• rollback

peer node start

启动一个和网络交互的节点。

Starts a node that interacts with the network.

Usage:
  peer node start [flags]

Flags:
  -h, --help                help for start
      --peer-chaincodedev   start peer in chaincode development mode

peer node reset

将通道重置到创世区块。执行该命令时，节点必须是离线的。当节点在重置之后启动时，它将会从排序节点或者其他 Peer 节点从1号区块开始获取区块，并重建区块存储和状态数据库。

Usage:
  peer node reset [flags]

Flags:
  -h, --help   reset 的帮助

peer node rollback

从指定的区块号回滚通道。执行该命令时，节点必须是离线的。当节点在回滚之后启动时，它将会从排序节点或者其他 Peer 节点获取回滚过程中删除的区块，并重建区块存储和状态数据库。


Usage:
  peer node rollback [flags]

Flags:
  -b, --blockNumber uint   通道要回滚的区块序号
  -c, --channelID string   要回滚的通道
  -h, --help               rollback 的帮助

示例用法

peer node start 示例

下边的命令：

peer node start --peer-chaincodedev

以开发者模式启动 Peer 节点。一般来说链码容器由 Peer 节点启动和维护。但是在链码的开发者模式下，链码通过用户来编译和启动。这个模式在链码开发阶段很有帮助。

peer node reset 示例

peer node reset

resets all channels in the peer to the genesis block, i.e., the first block in the channel. The command also records the pre-reset height of each channel in the file system. Note that the peer process should be stopped while executing this command. If the peer process is running, this command detects that and returns an error instead of performing the reset. When the peer is started after performing the reset, the peer will fetch the blocks for each channel which were removed by the reset command (either from other peers or orderers) and commit the blocks up to the pre-reset height. Until all channels reach the pre-reset height, the peer will not endorse any transactions.

peer node rollback 示例

The following command:

peer node rollback -c ch1 -b 150

rolls back the channel ch1 to block number 150. The command also records the pre-rolled back height of channel ch1 in the file system. Note that the peer should be stopped while executing this command. If the peer process is running, this command detects that and returns an error instead of performing the rollback. When the peer is started after performing the rollback, the peer will fetch the blocks for channel ch1 which were removed by the rollback command (either from other peers or orderers) and commit the blocks up to the pre-rolled back height. Until the channel ch1 reaches the pre-rolled back height, the peer will not endorse any transaction for any channel.

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