On Tue, Sep 20, 2022 at 2:05 AM Ihar Hrachyshka <ihrac...@redhat.com> wrote:
> 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 241913d1f..bc8fb5282 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 ? smap_get(&cfg->external_ids,
> "system-id")
> 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 59ae732b3..c71b0851f 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,
> @@ -3519,6 +3547,9 @@ 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);
> @@ -4485,6 +4516,9 @@ 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 3614601e2..5972089f1 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
>
> _______________________________________________
> dev mailing list
> d...@openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>
>
Looks good to me, thanks.
Reviewed-by: Ales Musil <amu...@redhat.com>
--
Ales Musil
Senior Software Engineer - OVN Core
Red Hat EMEA <https://www.redhat.com>
amu...@redhat.com IM: amusil
<https://red.ht/sig>
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