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c439139bf8
pacemaker/001-remote-start-state.patch
Chris Lumens c439139bf8 Support start state for Pacemaker Remote nodes 
- Related: rhbz2182482
2023-06-21 11:54:20 -04:00

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From cf53f523e691295879cd75cff1a86bc15664fa51 Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 09:59:13 -0400
Subject: [PATCH 1/7] Feature: daemons: Add start state to LRMD handshake XML
This gets read out of /etc/sysconfig/pacemaker and set into the
environment. The remote node executor will then add that to the XML
that it sends to the controller upon startup.
Ref T183
---
daemons/execd/execd_commands.c | 5 +++++
include/crm_internal.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/daemons/execd/execd_commands.c b/daemons/execd/execd_commands.c
index fa2761e..9a783a5 100644
--- a/daemons/execd/execd_commands.c
+++ b/daemons/execd/execd_commands.c
@@ -1474,6 +1474,7 @@ process_lrmd_signon(pcmk__client_t *client, xmlNode *request, int call_id,
int rc = pcmk_ok;
time_t now = time(NULL);
const char *protocol_version = crm_element_value(request, F_LRMD_PROTOCOL_VERSION);
+ const char *start_state = pcmk__env_option(PCMK__ENV_NODE_START_STATE);
if (compare_version(protocol_version, LRMD_MIN_PROTOCOL_VERSION) < 0) {
crm_err("Cluster API version must be greater than or equal to %s, not %s",
@@ -1503,6 +1504,10 @@ process_lrmd_signon(pcmk__client_t *client, xmlNode *request, int call_id,
crm_xml_add(*reply, F_LRMD_PROTOCOL_VERSION, LRMD_PROTOCOL_VERSION);
crm_xml_add_ll(*reply, PCMK__XA_UPTIME, now - start_time);
+ if (start_state) {
+ crm_xml_add(*reply, PCMK__XA_NODE_START_STATE, start_state);
+ }
+
return rc;
}
diff --git a/include/crm_internal.h b/include/crm_internal.h
index 5f6531f..771bd26 100644
--- a/include/crm_internal.h
+++ b/include/crm_internal.h
@@ -84,6 +84,7 @@
#define PCMK__XA_GRAPH_ERRORS "graph-errors"
#define PCMK__XA_GRAPH_WARNINGS "graph-warnings"
#define PCMK__XA_MODE "mode"
+#define PCMK__XA_NODE_START_STATE "node_start_state"
#define PCMK__XA_TASK "task"
#define PCMK__XA_UPTIME "uptime"
#define PCMK__XA_CONN_HOST "connection_host"
--
2.31.1
From c950291742711b5c4c8986adc8e938fe6fef861c Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 10:04:32 -0400
Subject: [PATCH 2/7] Feature: liblrmd: Save a remote node's requested start
state
Ref T183
---
include/crm/common/ipc_internal.h | 1 +
lib/lrmd/lrmd_client.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/include/crm/common/ipc_internal.h b/include/crm/common/ipc_internal.h
index 5099dda..d203924 100644
--- a/include/crm/common/ipc_internal.h
+++ b/include/crm/common/ipc_internal.h
@@ -112,6 +112,7 @@ struct pcmk__remote_s {
int tcp_socket;
mainloop_io_t *source;
time_t uptime;
+ char *start_state;
/* CIB-only */
char *token;
diff --git a/lib/lrmd/lrmd_client.c b/lib/lrmd/lrmd_client.c
index c565728..4239105 100644
--- a/lib/lrmd/lrmd_client.c
+++ b/lib/lrmd/lrmd_client.c
@@ -588,7 +588,9 @@ lrmd_tls_connection_destroy(gpointer userdata)
}
free(native->remote->buffer);
+ free(native->remote->start_state);
native->remote->buffer = NULL;
+ native->remote->start_state = NULL;
native->source = 0;
native->sock = 0;
native->psk_cred_c = NULL;
@@ -980,6 +982,7 @@ lrmd_handshake(lrmd_t * lrmd, const char *name)
const char *version = crm_element_value(reply, F_LRMD_PROTOCOL_VERSION);
const char *msg_type = crm_element_value(reply, F_LRMD_OPERATION);
const char *tmp_ticket = crm_element_value(reply, F_LRMD_CLIENTID);
+ const char *start_state = crm_element_value(reply, PCMK__XA_NODE_START_STATE);
long long uptime = -1;
crm_element_value_int(reply, F_LRMD_RC, &rc);
@@ -992,6 +995,10 @@ lrmd_handshake(lrmd_t * lrmd, const char *name)
crm_element_value_ll(reply, PCMK__XA_UPTIME, &uptime);
native->remote->uptime = uptime;
+ if (start_state) {
+ native->remote->start_state = strdup(start_state);
+ }
+
if (rc == -EPROTO) {
crm_err("Executor protocol version mismatch between client (%s) and server (%s)",
LRMD_PROTOCOL_VERSION, version);
--
2.31.1
From 7302014c7b7296be31b1f542b3f107d55b1fb2a0 Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 10:05:13 -0400
Subject: [PATCH 3/7] Feature: liblrmd: Add lrmd__node_start_state.
This function is used to get the start state out of an lrmd_private_t
structure.
Ref T183
---
include/crm/lrmd_internal.h | 1 +
lib/lrmd/lrmd_client.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/include/crm/lrmd_internal.h b/include/crm/lrmd_internal.h
index 5810554..d1cd25d 100644
--- a/include/crm/lrmd_internal.h
+++ b/include/crm/lrmd_internal.h
@@ -47,6 +47,7 @@ void lrmd__set_result(lrmd_event_data_t *event, enum ocf_exitcode rc,
void lrmd__reset_result(lrmd_event_data_t *event);
time_t lrmd__uptime(lrmd_t *lrmd);
+const char *lrmd__node_start_state(lrmd_t *lrmd);
/* Shared functions for IPC proxy back end */
diff --git a/lib/lrmd/lrmd_client.c b/lib/lrmd/lrmd_client.c
index 4239105..82434b9 100644
--- a/lib/lrmd/lrmd_client.c
+++ b/lib/lrmd/lrmd_client.c
@@ -2538,3 +2538,15 @@ lrmd__uptime(lrmd_t *lrmd)
return native->remote->uptime;
}
}
+
+const char *
+lrmd__node_start_state(lrmd_t *lrmd)
+{
+ lrmd_private_t *native = lrmd->lrmd_private;
+
+ if (native->remote == NULL) {
+ return NULL;
+ } else {
+ return native->remote->start_state;
+ }
+}
--
2.31.1
From e5e4d43f847da0930bae12f63c7e9d9c44c07cdf Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 10:07:58 -0400
Subject: [PATCH 4/7] Refactor: controller: Make set_join_state a public
function.
This already does all the work of setting a node's start state. It just
needs to be made public and given arguments for what node to set instead
of reading globals.
Ref T183
---
daemons/controld/controld_join_client.c | 20 ++++++++++----------
daemons/controld/pacemaker-controld.h | 3 +++
2 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/daemons/controld/controld_join_client.c b/daemons/controld/controld_join_client.c
index da6a9d6..07e2a27 100644
--- a/daemons/controld/controld_join_client.c
+++ b/daemons/controld/controld_join_client.c
@@ -195,32 +195,31 @@ join_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *
free_xml(generation);
}
-static void
-set_join_state(const char * start_state)
+void
+set_join_state(const char *start_state, const char *node_name, const char *node_uuid)
{
if (pcmk__str_eq(start_state, "standby", pcmk__str_casei)) {
crm_notice("Forcing node %s to join in %s state per configured "
- "environment", controld_globals.our_nodename, start_state);
+ "environment", node_name, start_state);
cib__update_node_attr(controld_globals.logger_out,
controld_globals.cib_conn, cib_sync_call,
- XML_CIB_TAG_NODES, controld_globals.our_uuid,
+ XML_CIB_TAG_NODES, node_uuid,
NULL, NULL, NULL, "standby", "on", NULL, NULL);
} else if (pcmk__str_eq(start_state, "online", pcmk__str_casei)) {
crm_notice("Forcing node %s to join in %s state per configured "
- "environment", controld_globals.our_nodename, start_state);
+ "environment", node_name, start_state);
cib__update_node_attr(controld_globals.logger_out,
controld_globals.cib_conn, cib_sync_call,
- XML_CIB_TAG_NODES, controld_globals.our_uuid,
+ XML_CIB_TAG_NODES, node_uuid,
NULL, NULL, NULL, "standby", "off", NULL, NULL);
} else if (pcmk__str_eq(start_state, "default", pcmk__str_casei)) {
- crm_debug("Not forcing a starting state on node %s",
- controld_globals.our_nodename);
+ crm_debug("Not forcing a starting state on node %s", node_name);
} else {
crm_warn("Unrecognized start state '%s', using 'default' (%s)",
- start_state, controld_globals.our_nodename);
+ start_state, node_name);
}
}
@@ -335,7 +334,8 @@ do_cl_join_finalize_respond(long long action,
first_join = FALSE;
if (start_state) {
- set_join_state(start_state);
+ set_join_state(start_state, controld_globals.our_nodename,
+ controld_globals.our_uuid);
}
}
diff --git a/daemons/controld/pacemaker-controld.h b/daemons/controld/pacemaker-controld.h
index 1484a00..d8c2ddd 100644
--- a/daemons/controld/pacemaker-controld.h
+++ b/daemons/controld/pacemaker-controld.h
@@ -36,4 +36,7 @@ void controld_remove_voter(const char *uname);
void controld_election_fini(void);
void controld_stop_current_election_timeout(void);
+void set_join_state(const char *start_state, const char *node_name,
+ const char *node_uuid);
+
#endif
--
2.31.1
From 63d069adb344bba2c982013226f87dfd95afaff3 Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 13:38:03 -0400
Subject: [PATCH 5/7] Refactor: controller: set_join_state needs to take a
remote parameter.
Without this parameter, we won't know what to pass to as node_type to
cib__update_node_attr. And without that, that function will not know to
update a remote node - it'll try to update a regular node by the same
name, which either doesn't exist or is not what we were hoping would
happen.
Ref T138
---
daemons/controld/controld_join_client.c | 11 +++++++----
daemons/controld/pacemaker-controld.h | 2 +-
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/daemons/controld/controld_join_client.c b/daemons/controld/controld_join_client.c
index 07e2a27..799d1b4 100644
--- a/daemons/controld/controld_join_client.c
+++ b/daemons/controld/controld_join_client.c
@@ -196,7 +196,8 @@ join_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *
}
void
-set_join_state(const char *start_state, const char *node_name, const char *node_uuid)
+set_join_state(const char *start_state, const char *node_name, const char *node_uuid,
+ bool remote)
{
if (pcmk__str_eq(start_state, "standby", pcmk__str_casei)) {
crm_notice("Forcing node %s to join in %s state per configured "
@@ -204,7 +205,8 @@ set_join_state(const char *start_state, const char *node_name, const char *node_
cib__update_node_attr(controld_globals.logger_out,
controld_globals.cib_conn, cib_sync_call,
XML_CIB_TAG_NODES, node_uuid,
- NULL, NULL, NULL, "standby", "on", NULL, NULL);
+ NULL, NULL, NULL, "standby", "on", NULL,
+ remote ? "remote" : NULL);
} else if (pcmk__str_eq(start_state, "online", pcmk__str_casei)) {
crm_notice("Forcing node %s to join in %s state per configured "
@@ -212,7 +214,8 @@ set_join_state(const char *start_state, const char *node_name, const char *node_
cib__update_node_attr(controld_globals.logger_out,
controld_globals.cib_conn, cib_sync_call,
XML_CIB_TAG_NODES, node_uuid,
- NULL, NULL, NULL, "standby", "off", NULL, NULL);
+ NULL, NULL, NULL, "standby", "off", NULL,
+ remote ? "remote" : NULL);
} else if (pcmk__str_eq(start_state, "default", pcmk__str_casei)) {
crm_debug("Not forcing a starting state on node %s", node_name);
@@ -335,7 +338,7 @@ do_cl_join_finalize_respond(long long action,
first_join = FALSE;
if (start_state) {
set_join_state(start_state, controld_globals.our_nodename,
- controld_globals.our_uuid);
+ controld_globals.our_uuid, false);
}
}
diff --git a/daemons/controld/pacemaker-controld.h b/daemons/controld/pacemaker-controld.h
index d8c2ddd..2334cce 100644
--- a/daemons/controld/pacemaker-controld.h
+++ b/daemons/controld/pacemaker-controld.h
@@ -37,6 +37,6 @@ void controld_election_fini(void);
void controld_stop_current_election_timeout(void);
void set_join_state(const char *start_state, const char *node_name,
- const char *node_uuid);
+ const char *node_uuid, bool remote);
#endif
--
2.31.1
From 67274787898355065315f8c06d62458e2c2b0afe Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 10:09:02 -0400
Subject: [PATCH 6/7] Feature: controller: When a remote node starts, apply any
start state.
If we were given a start state in the handshake XML, that is now stored
in the remote node cache's private data. Extract it and set the state
on the node with set_node_state.
Fixes T183
---
daemons/controld/controld_remote_ra.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/daemons/controld/controld_remote_ra.c b/daemons/controld/controld_remote_ra.c
index f24b755..8ab1e46 100644
--- a/daemons/controld/controld_remote_ra.c
+++ b/daemons/controld/controld_remote_ra.c
@@ -280,6 +280,7 @@ remote_node_up(const char *node_name)
int call_opt;
xmlNode *update, *state;
crm_node_t *node;
+ lrm_state_t *connection_rsc = NULL;
CRM_CHECK(node_name != NULL, return);
crm_info("Announcing Pacemaker Remote node %s", node_name);
@@ -301,6 +302,20 @@ remote_node_up(const char *node_name)
purge_remote_node_attrs(call_opt, node);
pcmk__update_peer_state(__func__, node, CRM_NODE_MEMBER, 0);
+ /* Apply any start state that we were given from the environment on the
+ * remote node.
+ */
+ connection_rsc = lrm_state_find(node->uname);
+
+ if (connection_rsc != NULL) {
+ lrmd_t *lrm = connection_rsc->conn;
+ const char *start_state = lrmd__node_start_state(lrm);
+
+ if (start_state) {
+ set_join_state(start_state, node->uname, node->uuid, true);
+ }
+ }
+
/* pacemaker_remote nodes don't participate in the membership layer,
* so cluster nodes don't automatically get notified when they come and go.
* We send a cluster message to the DC, and update the CIB node state entry,
--
2.31.1
From 91cdda7056c9b9254a0d7e7a016b30f788e3e3ff Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 2 May 2023 10:16:30 -0400
Subject: [PATCH 7/7] Doc: sysconfig: Remote nodes now respect start state.
Ref T183
---
etc/sysconfig/pacemaker.in | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/etc/sysconfig/pacemaker.in b/etc/sysconfig/pacemaker.in
index 3b03ad6..041da71 100644
--- a/etc/sysconfig/pacemaker.in
+++ b/etc/sysconfig/pacemaker.in
@@ -144,8 +144,7 @@
# By default, the local host will join the cluster in an online or standby
# state when Pacemaker first starts depending on whether it was previously put
# into standby mode. If this variable is set to "standby" or "online", it will
-# force the local host to join in the specified state. This has no effect on
-# Pacemaker Remote nodes.
+# force the local host to join in the specified state.
#
# Default: PCMK_node_start_state="default"
--
2.31.1
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