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offload: Make the compression methods configurable.

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* guix/scripts/offload.scm (<build-machine>)[compression]
[compression-level]: New fields.
(open-ssh-session): Honor them.
* doc/guix.texi (Daemon Offload Setup): Document them.
This commit is contained in:
Ludovic Courtès 2016-12-05 23:15:17 +01:00
parent 067a2e2de9
commit 1d48cf948c
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2 changed files with 15 additions and 2 deletions
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7
doc/guix.texi
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@ -921,6 +921,13 @@ Port number of SSH server on the machine.
The SSH private key file to use when connecting to the machine, in
OpenSSH format.
@item @code{compression} (default: @code{"zlib@@openssh.com,zlib"})
@itemx @code{compression-level} (default: @code{3})
The SSH-level compression methods and compression level requested.
Note that offloading relies on SSH compression to reduce bandwidth usage
when transferring files to and from build machines.
@item @code{daemon-socket} (default: @code{"/var/guix/daemon-socket/socket"})
File name of the Unix-domain socket @command{guix-daemon} is listening
to on that machine.

10
guix/scripts/offload.scm
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@ -75,6 +75,10 @@
(private-key build-machine-private-key ; file name
(default (user-openssh-private-key)))
(host-key build-machine-host-key) ; string
(compression build-machine-compression ; string
(default "zlib@openssh.com,zlib"))
(compression-level build-machine-compression-level ;integer
(default 3))
(daemon-socket build-machine-daemon-socket ; string
(default "/var/guix/daemon-socket/socket"))
(parallel-builds build-machine-parallel-builds ; number
@ -175,8 +179,10 @@ private key from '~a': ~a")
;; We need lightweight compression when
;; exchanging full archives.
#:compression "zlib"
#:compression-level 3)))
#:compression
(build-machine-compression machine)
#:compression-level
(build-machine-compression-level machine))))
(match (connect! session)
('ok
;; Authenticate the server. XXX: Guile-SSH 0.10.1 doesn't know about