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[pv] add ability to use ipc validator (#2866)

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Ref #2827

(I have since seen #2847 which is a fix for the same issue; this PR has tests and docs too ;) )
This commit is contained in:
Joe Bowman
2018-11-21 10:45:20 +04:00
committed by Anton Kaliaev
parent 42592d9ae0
commit 72f86b5192
4 changed files with 162 additions and 28 deletions
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docs/architecture/adr-008-priv-validator.md
+13 -7
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@@ -5,14 +5,17 @@ implementations:
- FilePV uses an unencrypted private key in a "priv_validator.json" file - no
configuration required (just `tendermint init`).
- SocketPV uses a socket to send signing requests to another process - user is
responsible for starting that process themselves.
- TCPVal and IPCVal use TCP and Unix sockets respectively to send signing requests
to another process - the user is responsible for starting that process themselves.
The SocketPV address can be provided via flags at the command line - doing so
will cause Tendermint to ignore any "priv_validator.json" file and to listen on
the given address for incoming connections from an external priv_validator
process. It will halt any operation until at least one external process
succesfully connected.
Both TCPVal and IPCVal addresses can be provided via flags at the command line
or in the configuration file; TCPVal addresses must be of the form
`tcp://<ip_address>:<port>` and IPCVal addresses `unix:///path/to/file.sock` -
doing so will cause Tendermint to ignore any private validator files.
TCPVal will listen on the given address for incoming connections from an external
private validator process. It will halt any operation until at least one external
process successfully connected.
The external priv_validator process will dial the address to connect to
Tendermint, and then Tendermint will send requests on the ensuing connection to
@@ -21,6 +24,9 @@ but the Tendermint process makes all requests. In a later stage we're going to
support multiple validators for fault tolerance. To prevent double signing they
need to be synced, which is deferred to an external solution (see #1185).
Conversely, IPCVal will make an outbound connection to an existing socket opened
by the external validator process.
In addition, Tendermint will provide implementations that can be run in that
external process. These include: