Before the patch, system-id could be configured via a global config
option in ovsdb. This patch adds another option - configure system-id
via a file. This is achieved by writing the desired system-id into the
following file location: ${OVN_SYSCONFDIR}/system-id-override.
The file is read on controller startup. The file setting overrides
configuration stored in ovsdb, if any.
This may be useful when running multiple containerized controller
instances using the same vswitchd.
Signed-off-by: Ihar Hrachyshka <ihrac...@redhat.com>
---
controller/chassis.c | 6 ++++++
controller/chassis.h | 2 ++
controller/ovn-controller.c | 34 ++++++++++++++++++++++++++++++
tests/ovn.at | 42 +++++++++++++++++++++++++++++++++++++
tests/ovs-macros.at | 2 ++
5 files changed, 86 insertions(+)
diff --git a/controller/chassis.c b/controller/chassis.c
index c8a332786..f121af3c3 100644
--- a/controller/chassis.c
+++ b/controller/chassis.c
@@ -37,6 +37,8 @@ VLOG_DEFINE_THIS_MODULE(chassis);
#define HOST_NAME_MAX 255
#endif /* HOST_NAME_MAX */
+char *file_system_id = NULL;
+
/*
* Structure for storing the chassis config parsed from the ovs table.
*/
@@ -277,6 +279,10 @@ chassis_parse_ovs_iface_types(char **iface_types, size_t
n_iface_types,
const char *
get_ovs_chassis_id(const struct ovsrec_open_vswitch_table *ovs_table)
{
+ if (file_system_id) {
+ return file_system_id;
+ }
+
const struct ovsrec_open_vswitch *cfg =
ovsrec_open_vswitch_table_first(ovs_table);
const char *chassis_id = cfg
diff --git a/controller/chassis.h b/controller/chassis.h
index 05a96bb0c..baa327059 100644
--- a/controller/chassis.h
+++ b/controller/chassis.h
@@ -31,6 +31,8 @@ struct sset;
struct eth_addr;
struct smap;
+extern char *file_system_id;
+
void chassis_register_ovs_idl(struct ovsdb_idl *);
const struct sbrec_chassis *chassis_run(
struct ovsdb_idl_txn *ovnsb_idl_txn,
diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
index 1814e0f8d..3f9878b5c 100644
--- a/controller/ovn-controller.c
+++ b/controller/ovn-controller.c
@@ -18,10 +18,14 @@
#include "ovn-controller.h"
#include <errno.h>
+#include <fcntl.h>
#include <getopt.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
#include "bfd.h"
#include "binding.h"
@@ -55,6 +59,7 @@
#include "lib/ip-mcast-index.h"
#include "lib/mac-binding-index.h"
#include "lib/mcast-group-index.h"
+#include "lib/ovn-dirs.h"
#include "lib/ovn-sb-idl.h"
#include "lib/ovn-util.h"
#include "patch.h"
@@ -151,6 +156,29 @@ struct pending_pkt {
/* Registered ofctrl seqno type for nb_cfg propagation. */
static size_t ofctrl_seq_type_nb_cfg;
+static char *get_file_system_id(void)
+{
+ char *ret = NULL;
+ char *filename = xasprintf("%s/system-id-override", ovn_sysconfdir());
+ errno = 0;
+ int fd = open(filename, O_RDONLY);
+ if (fd != -1) {
+ char system_id[64];
+ int nread = read(fd, system_id, sizeof system_id);
+ if (nread) {
+ system_id[nread] = '\0';
+ if (system_id[nread - 1] == '\n') {
+ system_id[nread - 1] = '\0';
+ }
+ ret = xstrdup(system_id);
+ }
+ close(fd);
+ }
+
+ free(filename);
+ return ret;
+}
+
static unsigned int
update_sb_monitors(struct ovsdb_idl *ovnsb_idl,
const struct sbrec_chassis *chassis,
@@ -3573,6 +3601,9 @@ main(int argc, char *argv[])
struct ovn_controller_exit_args exit_args = {&exiting, &restart};
int retval;
+ /* Read from system-id-override file once on startup. */
+ file_system_id = get_file_system_id();
+
ovs_cmdl_proctitle_init(argc, argv);
ovn_set_program_name(argv[0]);
service_start(&argc, &argv);
@@ -4545,6 +4576,9 @@ loop_done:
ovs_feature_support_destroy();
free(ovs_remote);
+ if (file_system_id) {
+ free(file_system_id);
+ }
service_stop();
exit(retval);
diff --git a/tests/ovn.at b/tests/ovn.at
index e45df02ae..d10a582fe 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -32930,3 +32930,45 @@ AT_CHECK(test x$encap_hv1_ip == x)
OVN_CLEANUP([hv1],[hv2])
AT_CLEANUP
])
+
+OVN_FOR_EACH_NORTHD([
+AT_SETUP([chassis name override via file])
+ovn_start
+net_add n1
+
+sim_add hv1
+as hv1
+ovs-vsctl add-br br-phys
+
+ovs-vsctl \
+ -- set Open_vSwitch . external-ids:ovn-encap-type-hv3=geneve \
+ -- set Open_vSwitch . external-ids:ovn-encap-ip-hv3=192.168.1.1
+
+as hv1 ovs-vsctl set-ssl \
+ $PKIDIR/testpki-hv3-privkey.pem \
+ $PKIDIR/testpki-hv3-cert.pem \
+ $PKIDIR/testpki-cacert.pem
+
+echo hv3 > ${OVN_SYSCONFDIR}/system-id-override
+ovn_attach n1 br-phys 192.168.0.1 24 vxlan
+
+sim_add hv2
+as hv2
+ovs-vsctl add-br br-phys
+ovn_attach n1 br-phys 192.168.0.2 24 geneve
+
+# despite that we configured ovn-encap-ip=192.168.0.1, this setting is
+# overridden by chassis specific ovn-encap-ip-hv3
+OVS_WAIT_UNTIL([
+ test "1" = "$(ovn-sbctl list Encap | grep -c '192.168.1.1')"
+])
+
+encap_hv3_ip=$(fetch_column Encap ip chassis_name=hv3 type=geneve)
+AT_CHECK(test x$encap_hv3_ip == x192.168.1.1)
+
+encap_hv1_ip=$(fetch_column Encap ip chassis_name=hv1 type=vxlan)
+AT_CHECK(test x$encap_hv1_ip == x)
+
+OVN_CLEANUP([hv1],[hv2])
+AT_CLEANUP
+])
diff --git a/tests/ovs-macros.at b/tests/ovs-macros.at
index 5a06fe956..36b58b5ae 100644
--- a/tests/ovs-macros.at
+++ b/tests/ovs-macros.at
@@ -88,7 +88,9 @@ ovs_setenv() {
OVS_LOGDIR=$ovs_dir; export OVS_LOGDIR
OVS_DBDIR=$ovs_dir; export OVS_DBDIR
OVS_SYSCONFDIR=$ovs_dir; export OVS_SYSCONFDIR
+ OVN_SYSCONFDIR=$ovs_dir; export OVN_SYSCONFDIR
OVS_PKGDATADIR=$ovs_dir; export OVS_PKGDATADIR
+ OVN_PKGDATADIR=$ovs_dir; export OVN_PKGDATADIR
}
# Prints the integers from $1 to $2, increasing by $3 (default 1) on stdout.
--
2.34.1
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