examples/domain/dommigrate.c

   1 /*
   2  * dommigrate.c: This file is largely inspired from hellolibvirt and
   3  *               contains a trivial example that illustrate p2p domain
   4  *               migration with libvirt.
   5  *
   6  * Copyright (C) 2014 Cloudwatt
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library.  If not, see
  20  * <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <libvirt/libvirt.h>
  26 #include <libvirt/virterror.h>
  27
  28
  29 static int
  30 usage(char *prgn, int ret)
  31 {
  32     printf("Usage: %s <src uri> <dst uri> <domain name>\n", prgn);
  33     return ret;
  34 }
  35
  36 int
  37 main(int argc, char *argv[])
  38 {
  39     char *src_uri, *dst_uri, *domname;
  40     int ret = 0;
  41     virConnectPtr conn = NULL;
  42     virDomainPtr dom = NULL;
  43
  44     if (argc < 4) {
  45         ret = usage(argv[0], 1);
  46         goto out;
  47     }
  48
  49     src_uri = argv[1];
  50     dst_uri = argv[2];
  51     domname = argv[3];
  52
  53     printf("Attempting to connect to the source hypervisor...\n");
  54     conn = virConnectOpenAuth(src_uri, virConnectAuthPtrDefault, 0);
  55     if (!conn) {
  56         ret = 1;
  57         fprintf(stderr, "No connection to the source hypervisor: %s.\n",
  58                 virGetLastErrorMessage());
  59         goto out;
  60     }
  61
  62     printf("Attempting to retrieve domain %s...\n", domname);
  63     dom = virDomainLookupByName(conn, domname);
  64     if (!dom) {
  65         fprintf(stderr, "Failed to find domain %s.\n", domname);
  66         goto cleanup;
  67     }
  68
  69     printf("Attempting to migrate %s to %s...\n", domname, dst_uri);
  70     if ((ret = virDomainMigrateToURI(dom, dst_uri,
  71                                      VIR_MIGRATE_PEER2PEER,
  72                                      NULL, 0)) != 0) {
  73         fprintf(stderr, "Failed to migrate domain %s.\n", domname);
  74         goto cleanup;
  75     }
  76
  77     printf("Migration finished with success.\n");
  78
  79  cleanup:
  80     if (dom != NULL)
  81         virDomainFree(dom);
  82     virConnectClose(conn);
  83
  84  out:
  85     return ret;
  86 }