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confd: startup-config hook with support for merging in at bootstrap

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This change adds a hook to the startup datastore, we use the ietf-system
module because the module argument is mandatory.  The hook runs when all
changes have been saved to the internal store.  Since sysrepo has many
startup files in /etc/sysrepo, we saving a JSON copy of all these files
in /cfg/startup-config.cfg, which is persistent.  On system bootstrap
this file is merged into the (empty) running datastore, which is what
the sysrepo maintainers recommend to be independent of any yang model
updates that might occur on image upgrades.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2023-04-02 16:24:08 +02:00
parent d8eb88e6da
commit 79eb5fd5f4
2 changed files with 28 additions and 4 deletions
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package/confd/sysrepo.conf
+3 -1
View File
@@ -1,6 +1,8 @@
run if:<boot/netconf> [S] /lib/infix/clean-etc --
run if:<boot/netconf> [S] /lib/infix/prep-db --
service if:<boot/netconf> name:sysrepo [12345789] sysrepo-plugind -n -- Configuration daemon
service if:<boot/netconf> name:sysrepo [S12345789] sysrepo-plugind -p /run/sysrepo.pid -n -- Configuration daemon
run if:<boot/netconf> [S] log <pid/sysrepo> sysrepocfg -v4 -E/cfg/startup-config.cfg -f json --
service if:<boot/netconf> name:netopeer [12345789] netopeer2-server -n -- NETCONF daemon
task if:<boot/netconf> [12345789] resolvconf -u -- Update DNS configuration
src/confd/src/core.c
+25 -3
View File
@@ -4,12 +4,24 @@
static struct confd confd;
static int startup_save_hook(sr_session_ctx_t *session, uint32_t sub_id, const char *module,
const char *xpath, sr_event_t event, unsigned request_id, void *priv)
{
if (run("sysrepocfg -X/cfg/startup-config.cfg -d startup -f json"))
return SR_ERR_SYS;
return SR_ERR_OK;
}
int sr_plugin_init_cb(sr_session_ctx_t *session, void **priv)
{
sr_session_ctx_t *startup;
int rc = SR_ERR_SYS;
openlog("confd", LOG_USER, 0);
/* Save context with default running config datastore for all our models */
*priv = (void *)&confd;
confd.session = session;
confd.conn = sr_session_get_connection(session);
confd.sub = NULL;
@@ -21,11 +33,21 @@ int sr_plugin_init_cb(sr_session_ctx_t *session, void **priv)
if (!confd.aug)
goto err;
*priv = (void *)&confd;
if (ietf_system_init(&confd))
if (rc = ietf_system_init(&confd))
goto err;
/* YOUR_INIT GOES HERE */
/* Set up hook to save startup-config to persisten backend store */
if (rc = sr_session_start(confd.conn, SR_DS_STARTUP, &startup))
goto err;
if (rc = sr_module_change_subscribe(startup, "ietf-system", "/ietf-system:system//.",
startup_save_hook, NULL, 0, SR_SUBSCR_PASSIVE | SR_SUBSCR_DONE_ONLY, &confd.sub)) {
ERROR("failed setting up startup-config hook: %s", sr_strerror(rc));
goto err;
}
return SR_ERR_OK;
err:
ERROR("init failed: %s", sr_strerror(rc));