Daemon config parameter switch between reading host uuid
either from smbios or machine-id:
host_uuid_source = "smbios|machine-id"
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@xxxxxxxxxxxxx>
---
daemon/libvirtd-config.c | 2 ++
daemon/libvirtd-config.h | 1 +
daemon/libvirtd.aug | 1 +
daemon/libvirtd.c | 38 +++++++++++++++++++++++++++++++++++---
daemon/libvirtd.conf | 15 +++++++++++----
daemon/test_libvirtd.aug.in | 1 +
6 files changed, 51 insertions(+), 7 deletions(-)
diff --git a/daemon/libvirtd-config.c b/daemon/libvirtd-config.c
index 7a448f9..45280e9 100644
--- a/daemon/libvirtd-config.c
+++ b/daemon/libvirtd-config.c
@@ -374,6 +374,7 @@ daemonConfigFree(struct daemonConfig *data)
VIR_FREE(data->crl_file);
VIR_FREE(data->host_uuid);
+ VIR_FREE(data->host_uuid_source);
VIR_FREE(data->log_filters);
VIR_FREE(data->log_outputs);
@@ -463,6 +464,7 @@ daemonConfigLoadOptions(struct daemonConfig *data,
GET_CONF_UINT(conf, filename, audit_logging);
GET_CONF_STR(conf, filename, host_uuid);
+ GET_CONF_STR(conf, filename, host_uuid_source);
GET_CONF_UINT(conf, filename, log_level);
GET_CONF_STR(conf, filename, log_filters);
diff --git a/daemon/libvirtd-config.h b/daemon/libvirtd-config.h
index 3e1971d..672e9ad 100644
--- a/daemon/libvirtd-config.h
+++ b/daemon/libvirtd-config.h
@@ -28,6 +28,7 @@
struct daemonConfig {
char *host_uuid;
+ char *host_uuid_source;
int listen_tls;
int listen_tcp;
diff --git a/daemon/libvirtd.aug b/daemon/libvirtd.aug
index a70aa1d..6561480 100644
--- a/daemon/libvirtd.aug
+++ b/daemon/libvirtd.aug
@@ -86,6 +86,7 @@ module Libvirtd =
| bool_entry "admin_keepalive_required"
let misc_entry = str_entry "host_uuid"
+ | str_entry "host_uuid_source"
(* Each enty in the config is one of the following three ... *)
let entry = network_entry
diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c
index 7ec02ad..a489136 100644
--- a/daemon/libvirtd.c
+++ b/daemon/libvirtd.c
@@ -1076,6 +1076,39 @@ static int migrateProfile(void)
return ret;
}
+static int
+daemonSetupHostUUID(const struct daemonConfig *config)
+{
+ static const char *machine_id = "/etc/machine-id";
+ char buf[VIR_UUID_STRING_BUFLEN];
+ const char *uuid;
+
+ if (config->host_uuid) {
+ uuid = config->host_uuid;
+ } else if (!config->host_uuid_source ||
+ STREQ(config->host_uuid_source, "smbios")) {
+ /* smbios UUID is fetched on demand in virGetHostUUID */
+ return 0;
+ } else if (STREQ(config->host_uuid_source, "machine-id")) {
+ if (virFileReadBufQuiet(machine_id, buf, sizeof(buf)) < 0) {
+ VIR_ERROR(_("Can't read %s"), machine_id);
+ return -1;
+ }
+
+ uuid = buf;
+ } else {
+ VIR_ERROR(_("invalid UUID source: %s"), config->host_uuid_source);
+ return -1;
+ }
+
+ if (virSetHostUUIDStr(uuid)) {
+ VIR_ERROR(_("invalid host UUID: %s"), uuid);
+ return -1;
+ }
+
+ return 0;
+}
+
/* Print command-line usage. */
static void
daemonUsage(const char *argv0, bool privileged)
@@ -1295,9 +1328,8 @@ int main(int argc, char **argv) {
exit(EXIT_FAILURE);
}
- if (config->host_uuid &&
- virSetHostUUIDStr(config->host_uuid) < 0) {
- VIR_ERROR(_("invalid host UUID: %s"), config->host_uuid);
+ if (daemonSetupHostUUID(config) < 0) {
+ VIR_ERROR(_("Can't setup host uuid"));
exit(EXIT_FAILURE);
}
diff --git a/daemon/libvirtd.conf b/daemon/libvirtd.conf
index d2c439c..1c1fa7f 100644
--- a/daemon/libvirtd.conf
+++ b/daemon/libvirtd.conf
@@ -410,10 +410,16 @@
###################################################################
# UUID of the host:
-# Provide the UUID of the host here in case the command
-# 'dmidecode -s system-uuid' does not provide a valid uuid. In case
-# 'dmidecode' does not provide a valid UUID and none is provided here, a
-# temporary UUID will be generated.
+# Host UUID is read from one of the sources specified in host_uuid_source.
+#
+# - 'smbios': fetch the UUID from 'dmidecode -s system-uuid'
+# - 'machine-id': fetch the UUID from /etc/machine-id
+#
+# The host_uuid_source default is 'smbios'. If 'dmidecode' does not provide
+# a valid UUID a temporary UUID will be generated.
+#
+# Another option is to specify host UUID in host_uuid.
+#
# Keep the format of the example UUID below. UUID must not have all digits
# be the same.
@@ -421,6 +427,7 @@
# it with the output of the 'uuidgen' command and then
# uncomment this entry
#host_uuid = "00000000-0000-0000-0000-000000000000"
+#host_uuid_source = "smbios"
###################################################################
# Keepalive protocol:
diff --git a/daemon/test_libvirtd.aug.in b/daemon/test_libvirtd.aug.in
index b0cb7eb..7a03603 100644
--- a/daemon/test_libvirtd.aug.in
+++ b/daemon/test_libvirtd.aug.in
@@ -55,6 +55,7 @@ module Test_libvirtd =
{ "audit_level" = "2" }
{ "audit_logging" = "1" }
{ "host_uuid" = "00000000-0000-0000-0000-000000000000" }
+ { "host_uuid_source" = "smbios" }
{ "keepalive_interval" = "5" }
{ "keepalive_count" = "5" }
{ "keepalive_required" = "1" }
--
1.8.3.1
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