mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
9ba6717e94
On baremetal you can build and customize a new guest in under 2
minutes. For example:
$ virt-builder fedora-19 \
--root-password password:test \
--install minicom \
--firstboot-command 'yum -y update' \
--firstboot-command 'useradd -m -p "" rjones ; chage -d 0 rjones'
[ 0.0] Downloading: file:///home/rjones/d/libguestfs/builder/website/fedora-19.xz
[ 1.0] Uncompressing: file:///home/rjones/d/libguestfs/builder/website/fedora-19.xz
[ 24.0] Running virt-resize to expand the disk to 4.2G
[ 77.0] Opening the new disk
[ 81.0] Installing packages: minicom
[ 94.0] Installing firstboot command: [001] yum -y update
[ 94.0] Installing firstboot command: [002] useradd -m -p "" rjones ; chage -d 0 rjones
[ 94.0] Finishing off
115 lines
3.3 KiB
OCaml
115 lines
3.3 KiB
OCaml
(* virt-builder
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* Copyright (C) 2013 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Common_gettext.Gettext
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open Unix
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open Printf
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let quote = Filename.quote
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let (//) = Filename.concat
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type uri = string
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type filename = string
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type t = {
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debug : bool;
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curl : string;
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cache : string option; (* cache directory for templates *)
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}
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let create ~debug ~curl ~cache = {
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debug = debug;
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curl = curl;
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cache = cache;
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}
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let rec download t ?template uri =
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match template with
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| None -> (* no cache, simple download *)
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(* Create a temporary name. *)
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let tmpfile = Filename.temp_file "vbcache" ".txt" in
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download_to t uri tmpfile;
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(tmpfile, true)
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| Some (name, revision) ->
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match t.cache with
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| None ->
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(* Not using the cache at all? *)
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download t uri
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| Some cachedir ->
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let filename = cachedir // sprintf "%s.%d" name revision in
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(* Is the requested template name + revision in the cache already?
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* If not, download it.
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*)
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if not (Sys.file_exists filename) then
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download_to t uri filename;
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(filename, false)
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and download_to t uri filename =
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(* Get the status code first to ensure the file exists. *)
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let cmd = sprintf "%s%s -g -o /dev/null -I -w '%%{http_code}' %s"
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t.curl (if t.debug then "" else " -s -S") (quote uri) in
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let chan = open_process_in cmd in
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let status_code = input_line chan in
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let stat = close_process_in chan in
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(match stat with
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| WEXITED 0 -> ()
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| WEXITED i ->
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eprintf (f_"virt-builder: curl (download) command failed downloading '%s'\n") uri;
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exit 1
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| WSIGNALED i ->
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eprintf (f_"virt-builder: external command '%s' killed by signal %d\n")
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cmd i;
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exit 1
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| WSTOPPED i ->
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eprintf (f_"virt-builder: external command '%s' stopped by signal %d\n")
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cmd i;
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exit 1
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);
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let bad_status_code = function
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| "" -> true
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| s when s.[0] = '4' -> true (* 4xx *)
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| s when s.[0] = '5' -> true (* 5xx *)
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| _ -> false
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in
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if bad_status_code status_code then (
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eprintf (f_"virt-builder: failed to download %s: HTTP status code %s\n")
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uri status_code;
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exit 1
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);
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(* Now download the file. *)
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let filename_new = filename ^ ".new" in
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let cmd = sprintf "%s%s -g -o %s %s"
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t.curl (if t.debug then "" else " -s -S")
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(quote filename_new) (quote uri) in
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if t.debug then eprintf "%s\n%!" cmd;
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let r = Sys.command cmd in
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if r <> 0 then (
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eprintf (f_"virt-builder: curl (download) command failed downloading '%s'\n") uri;
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(try unlink filename_new with _ -> ());
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exit 1
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);
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(* Rename the file if curl was successful. *)
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rename filename_new filename
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