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add migration support for OpenVZ driver
This patch adds initial migration support to the OpenVZ driver, using the VIR_DRV_FEATURE_MIGRATION_PARAMS family of migration functions. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Hongbin Lu
Michal Privoznik
parent
d00c6fd258
commit
7e649c5450
@ -35,9 +35,10 @@
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/* OpenVZ commands - Replace with wrapper scripts later? */
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# define VZLIST "/usr/sbin/vzlist"
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# define VZCTL "/usr/sbin/vzctl"
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# define VZ_CONF_FILE "/etc/vz/vz.conf"
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# define VZLIST "/usr/sbin/vzlist"
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# define VZCTL "/usr/sbin/vzctl"
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# define VZMIGRATE "/usr/sbin/vzmigrate"
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# define VZ_CONF_FILE "/etc/vz/vz.conf"
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# define VZCTL_BRIDGE_MIN_VERSION ((3 * 1000 * 1000) + (0 * 1000) + 22 + 1)
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@ -2207,6 +2207,348 @@ openvzNodeGetCPUMap(virConnectPtr conn ATTRIBUTE_UNUSED,
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}
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static int
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openvzConnectSupportsFeature(virConnectPtr conn ATTRIBUTE_UNUSED, int feature)
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{
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switch (feature) {
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case VIR_DRV_FEATURE_MIGRATION_PARAMS:
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case VIR_DRV_FEATURE_MIGRATION_V3:
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return 1;
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default:
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return 0;
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}
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}
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static char *
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openvzDomainMigrateBegin3Params(virDomainPtr domain,
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virTypedParameterPtr params,
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int nparams,
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char **cookieout ATTRIBUTE_UNUSED,
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int *cookieoutlen ATTRIBUTE_UNUSED,
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unsigned int flags)
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{
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virDomainObjPtr vm = NULL;
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struct openvz_driver *driver = domain->conn->privateData;
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char *xml = NULL;
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int status;
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virCheckFlags(OPENVZ_MIGRATION_FLAGS, NULL);
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if (virTypedParamsValidate(params, nparams, OPENVZ_MIGRATION_PARAMETERS) < 0)
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return NULL;
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openvzDriverLock(driver);
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vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
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openvzDriverUnlock(driver);
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if (!vm) {
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virReportError(VIR_ERR_NO_DOMAIN, "%s",
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_("no domain with matching uuid"));
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goto cleanup;
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}
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if (!virDomainObjIsActive(vm)) {
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virReportError(VIR_ERR_OPERATION_INVALID,
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"%s", _("domain is not running"));
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goto cleanup;
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}
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if (openvzGetVEStatus(vm, &status, NULL) == -1)
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goto cleanup;
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if (status != VIR_DOMAIN_RUNNING) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("domain is not in running state"));
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goto cleanup;
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}
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xml = virDomainDefFormat(vm->def, VIR_DOMAIN_XML_SECURE);
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cleanup:
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if (vm)
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virObjectUnlock(vm);
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return xml;
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}
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static int
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openvzDomainMigratePrepare3Params(virConnectPtr dconn,
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virTypedParameterPtr params,
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int nparams,
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const char *cookiein ATTRIBUTE_UNUSED,
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int cookieinlen ATTRIBUTE_UNUSED,
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char **cookieout ATTRIBUTE_UNUSED,
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int *cookieoutlen ATTRIBUTE_UNUSED,
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char **uri_out,
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unsigned int fflags ATTRIBUTE_UNUSED)
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{
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struct openvz_driver *driver = dconn->privateData;
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const char *dom_xml = NULL;
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const char *uri_in = NULL;
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virDomainDefPtr def = NULL;
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virDomainObjPtr vm = NULL;
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char *hostname = NULL;
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virURIPtr uri = NULL;
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int ret = -1;
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if (virTypedParamsValidate(params, nparams, OPENVZ_MIGRATION_PARAMETERS) < 0)
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goto error;
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if (virTypedParamsGetString(params, nparams,
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VIR_MIGRATE_PARAM_DEST_XML,
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&dom_xml) < 0 ||
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virTypedParamsGetString(params, nparams,
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VIR_MIGRATE_PARAM_URI,
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&uri_in) < 0)
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goto error;
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if (!dom_xml) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("no domain XML passed"));
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goto error;
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}
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if (!(def = virDomainDefParseString(dom_xml, driver->caps, driver->xmlopt,
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1 << VIR_DOMAIN_VIRT_OPENVZ,
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VIR_DOMAIN_XML_INACTIVE)))
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goto error;
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if (!(vm = virDomainObjListAdd(driver->domains, def,
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driver->xmlopt,
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VIR_DOMAIN_OBJ_LIST_ADD_LIVE |
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VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
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NULL)))
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goto error;
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def = NULL;
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if (!uri_in) {
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if ((hostname = virGetHostname()) == NULL)
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goto error;
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if (STRPREFIX(hostname, "localhost")) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("hostname on destination resolved to localhost,"
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" but migration requires an FQDN"));
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goto error;
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}
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} else {
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uri = virURIParse(uri_in);
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if (uri == NULL) {
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virReportError(VIR_ERR_INVALID_ARG,
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_("unable to parse URI: %s"),
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uri_in);
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goto error;
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}
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if (uri->server == NULL) {
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virReportError(VIR_ERR_INVALID_ARG,
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_("missing host in migration URI: %s"),
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uri_in);
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goto error;
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} else {
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hostname = uri->server;
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}
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}
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if (virAsprintf(uri_out, "ssh://%s", hostname) < 0)
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goto error;
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ret = 0;
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goto done;
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error:
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virDomainDefFree(def);
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if (vm) {
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virDomainObjListRemove(driver->domains, vm);
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vm = NULL;
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}
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done:
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virURIFree(uri);
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if (vm)
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virObjectUnlock(vm);
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return ret;
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}
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static int
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openvzDomainMigratePerform3Params(virDomainPtr domain,
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const char *dconnuri ATTRIBUTE_UNUSED,
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virTypedParameterPtr params,
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int nparams,
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const char *cookiein ATTRIBUTE_UNUSED,
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int cookieinlen ATTRIBUTE_UNUSED,
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char **cookieout ATTRIBUTE_UNUSED,
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int *cookieoutlen ATTRIBUTE_UNUSED,
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unsigned int flags)
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{
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struct openvz_driver *driver = domain->conn->privateData;
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virDomainObjPtr vm = NULL;
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const char *uri_str = NULL;
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virURIPtr uri = NULL;
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virCommandPtr cmd = virCommandNew(VZMIGRATE);
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int ret = -1;
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virCheckFlags(OPENVZ_MIGRATION_FLAGS, -1);
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if (virTypedParamsValidate(params, nparams, OPENVZ_MIGRATION_PARAMETERS) < 0)
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goto cleanup;
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if (virTypedParamsGetString(params, nparams,
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VIR_MIGRATE_PARAM_URI,
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&uri_str) < 0)
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goto cleanup;
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openvzDriverLock(driver);
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vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
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openvzDriverUnlock(driver);
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if (!vm) {
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virReportError(VIR_ERR_NO_DOMAIN, "%s",
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_("no domain with matching uuid"));
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goto cleanup;
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}
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/* parse dst host:port from uri */
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uri = virURIParse(uri_str);
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if (uri == NULL || uri->server == NULL)
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goto cleanup;
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if (flags & VIR_MIGRATE_LIVE)
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virCommandAddArg(cmd, "--live");
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virCommandAddArg(cmd, uri->server);
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virCommandAddArg(cmd, vm->def->name);
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if (virCommandRun(cmd, NULL) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virCommandFree(cmd);
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virURIFree(uri);
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if (vm)
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virObjectUnlock(vm);
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return ret;
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}
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static virDomainPtr
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openvzDomainMigrateFinish3Params(virConnectPtr dconn,
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virTypedParameterPtr params,
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int nparams,
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const char *cookiein ATTRIBUTE_UNUSED,
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int cookieinlen ATTRIBUTE_UNUSED,
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char **cookieout ATTRIBUTE_UNUSED,
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int *cookieoutlen ATTRIBUTE_UNUSED,
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unsigned int flags,
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int cancelled)
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{
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struct openvz_driver *driver = dconn->privateData;
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virDomainObjPtr vm = NULL;
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const char *dname = NULL;
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virDomainPtr dom = NULL;
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int status;
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if (cancelled)
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goto cleanup;
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virCheckFlags(OPENVZ_MIGRATION_FLAGS, NULL);
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if (virTypedParamsValidate(params, nparams, OPENVZ_MIGRATION_PARAMETERS) < 0)
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goto cleanup;
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if (virTypedParamsGetString(params, nparams,
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VIR_MIGRATE_PARAM_DEST_NAME,
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&dname) < 0)
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goto cleanup;
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if (!dname ||
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!(vm = virDomainObjListFindByName(driver->domains, dname))) {
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/* Migration obviously failed if the domain doesn't exist */
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virReportError(VIR_ERR_OPERATION_FAILED,
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_("Migration failed. No domain on destination host "
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"with matching name '%s'"),
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NULLSTR(dname));
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goto cleanup;
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}
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if (openvzGetVEStatus(vm, &status, NULL) == -1)
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goto cleanup;
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if (status != VIR_DOMAIN_RUNNING) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("domain is not running on destination host"));
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goto cleanup;
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}
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vm->def->id = strtoI(vm->def->name);
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virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_MIGRATED);
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dom = virGetDomain(dconn, vm->def->name, vm->def->uuid);
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if (dom)
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dom->id = vm->def->id;
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cleanup:
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if (vm)
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virObjectUnlock(vm);
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return dom;
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}
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static int
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openvzDomainMigrateConfirm3Params(virDomainPtr domain,
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virTypedParameterPtr params,
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int nparams,
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const char *cookiein ATTRIBUTE_UNUSED,
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int cookieinlen ATTRIBUTE_UNUSED,
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unsigned int flags,
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int cancelled)
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{
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struct openvz_driver *driver = domain->conn->privateData;
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virDomainObjPtr vm = NULL;
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int status;
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int ret = -1;
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virCheckFlags(OPENVZ_MIGRATION_FLAGS, -1);
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if (virTypedParamsValidate(params, nparams, OPENVZ_MIGRATION_PARAMETERS) < 0)
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goto cleanup;
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openvzDriverLock(driver);
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vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
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openvzDriverUnlock(driver);
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if (!vm) {
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virReportError(VIR_ERR_NO_DOMAIN, "%s",
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_("no domain with matching uuid"));
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goto cleanup;
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}
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if (cancelled) {
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if (openvzGetVEStatus(vm, &status, NULL) == -1)
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goto cleanup;
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if (status == VIR_DOMAIN_RUNNING) {
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ret = 0;
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} else {
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VIR_DEBUG("Domain '%s' does not recover after failed migration",
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vm->def->name);
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}
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goto cleanup;
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}
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vm->def->id = -1;
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VIR_DEBUG("Domain '%s' successfully migrated", vm->def->name);
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virDomainObjListRemove(driver->domains, vm);
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vm = NULL;
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ret = 0;
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cleanup:
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if (vm)
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virObjectUnlock(vm);
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return ret;
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}
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static virDriver openvzDriver = {
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.no = VIR_DRV_OPENVZ,
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.name = "OPENVZ",
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@ -2265,6 +2607,12 @@ static virDriver openvzDriver = {
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.connectIsAlive = openvzConnectIsAlive, /* 0.9.8 */
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.domainUpdateDeviceFlags = openvzDomainUpdateDeviceFlags, /* 0.9.13 */
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.domainGetHostname = openvzDomainGetHostname, /* 0.10.0 */
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.connectSupportsFeature = openvzConnectSupportsFeature, /* 1.2.8 */
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.domainMigrateBegin3Params = openvzDomainMigrateBegin3Params, /* 1.2.8 */
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.domainMigratePrepare3Params = openvzDomainMigratePrepare3Params, /* 1.2.8 */
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.domainMigratePerform3Params = openvzDomainMigratePerform3Params, /* 1.2.8 */
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.domainMigrateFinish3Params = openvzDomainMigrateFinish3Params, /* 1.2.8 */
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.domainMigrateConfirm3Params = openvzDomainMigrateConfirm3Params, /* 1.2.8 */
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};
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int openvzRegister(void)
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@ -31,6 +31,16 @@
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# include "internal.h"
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# define OPENVZ_MIGRATION_FLAGS \
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(VIR_MIGRATE_LIVE)
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/* All supported migration parameters and their types. */
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# define OPENVZ_MIGRATION_PARAMETERS \
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VIR_MIGRATE_PARAM_URI, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_DEST_NAME, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_DEST_XML, VIR_TYPED_PARAM_STRING, \
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NULL
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int openvzRegister(void);
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#endif
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