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Improve "repmgr cluster show" display

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Rather than simply emit "FAILED" for an unreachable node,
indicate whether its state matches that expected by repmgr.

E.g. following output:

   ID | Name  | Role    | Status               | Upstream | Connection string
  ----+-------+---------+----------------------+----------+----------------------------------------------------
   1  | node1 | primary | * running            |          | host=localhost dbname=repmgr user=repmgr port=5501
   2  | node2 | standby | ? unreachable        | node1    | host=localhost dbname=repmgr user=repmgr port=5502
   3  | node3 | standby | ! running as primary | node1    | host=localhost dbname=repmgr user=repmgr port=5503

is for a cluster where "node2" has been manually stopped, and "node3"
manually promoted.
This commit is contained in:
Ian Barwick
2017-07-19 23:10:32 +09:00
parent 076934558d
commit 8dcfbfc313
1 changed files with 135 additions and 36 deletions
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171
repmgr-action-cluster.c
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@@ -11,12 +11,17 @@
#include "repmgr-client-global.h"
#include "repmgr-action-cluster.h"
#define SHOW_HEADER_COUNT 4
#define SHOW_HEADER_COUNT 6
#define ROLE_HEADER 0
#define NAME_HEADER 1
#define UPSTREAM_NAME_HEADER 2
#define CONNINFO_HEADER 3
// id,name,role,status,upstream_name,conninfo
typedef enum {
SHOW_ID = 0,
SHOW_NAME,
SHOW_ROLE,
SHOW_STATUS,
SHOW_UPSTREAM_NAME,
SHOW_CONNINFO
} ShowHeader;
#define EVENT_HEADER_COUNT 5
@@ -64,10 +69,12 @@ do_cluster_show(void)
exit(ERR_BAD_CONFIG);
}
strncpy(headers_show[ROLE_HEADER].title, _("Role"), MAXLEN);
strncpy(headers_show[NAME_HEADER].title, _("Name"), MAXLEN);
strncpy(headers_show[UPSTREAM_NAME_HEADER].title, _("Upstream"), MAXLEN);
strncpy(headers_show[CONNINFO_HEADER].title, _("Connection string"), MAXLEN);
strncpy(headers_show[SHOW_ID].title, _("ID"), MAXLEN);
strncpy(headers_show[SHOW_NAME].title, _("Name"), MAXLEN);
strncpy(headers_show[SHOW_ROLE].title, _("Role"), MAXLEN);
strncpy(headers_show[SHOW_STATUS].title, _("Status"), MAXLEN);
strncpy(headers_show[SHOW_UPSTREAM_NAME].title, _("Upstream"), MAXLEN);
strncpy(headers_show[SHOW_CONNINFO].title, _("Connection string"), MAXLEN);
/*
* XXX if repmgr is ever localized into non-ASCII locales,
@@ -81,39 +88,129 @@ do_cluster_show(void)
for (cell = nodes.head; cell; cell = cell->next)
{
RecoveryType rec_type = RECTYPE_UNKNOWN;
PQExpBufferData details;
cell->node_info->conn = establish_db_connection_quiet(cell->node_info->conninfo);
if (PQstatus(conn) != CONNECTION_OK)
if (PQstatus(cell->node_info->conn) == CONNECTION_OK)
{
strcpy(cell->node_info->details, " FAILED");
}
else if (cell->node_info->type == BDR)
{
strcpy(cell->node_info->details, " BDR");
cell->node_info->node_status = NODE_STATUS_UP;
if (cell->node_info->type != BDR)
{
rec_type = get_recovery_type(cell->node_info->conn);
}
}
else
{
RecoveryType rec_type = get_recovery_type(cell->node_info->conn);
switch (rec_type)
{
case RECTYPE_PRIMARY:
strcpy(cell->node_info->details, "* primary");
break;
case RECTYPE_STANDBY:
strcpy(cell->node_info->details, " standby");
break;
case RECTYPE_UNKNOWN:
strcpy(cell->node_info->details, " unknown");
break;
}
cell->node_info->node_status = NODE_STATUS_DOWN;
}
initPQExpBuffer(&details);
/*
* TODO: count nodes marked as "? unreachable" and add a hint about
* the other cluster commands for better determining whether unreachable.
*/
switch (cell->node_info->type)
{
case PRIMARY:
{
/* node is reachable */
if (cell->node_info->node_status == NODE_STATUS_UP)
{
if (cell->node_info->active == true)
{
switch (rec_type)
{
case RECTYPE_PRIMARY:
appendPQExpBuffer(&details, "* running");
break;
case RECTYPE_STANDBY:
appendPQExpBuffer(&details, "! running as standby");
break;
case RECTYPE_UNKNOWN:
appendPQExpBuffer(&details, "! unknown");
break;
}
}
else
{
if (rec_type == RECTYPE_PRIMARY)
appendPQExpBuffer(&details, "! running");
else
appendPQExpBuffer(&details, "! running as standby");
}
}
else
{
/* node is unreachable but marked active*/
if (cell->node_info->active == true)
appendPQExpBuffer(&details, "? unreachable");
else
appendPQExpBuffer(&details, "- failed");
}
}
break;
case STANDBY:
{
/* node is reachable */
if (cell->node_info->node_status == NODE_STATUS_UP)
{
if (cell->node_info->active == true)
{
switch (rec_type)
{
case RECTYPE_STANDBY:
appendPQExpBuffer(&details, " running");
break;
case RECTYPE_PRIMARY:
appendPQExpBuffer(&details, "! running as primary");
break;
case RECTYPE_UNKNOWN:
appendPQExpBuffer(&details, "! unknown");
break;
}
}
else
{
if (rec_type == RECTYPE_STANDBY)
appendPQExpBuffer(&details, "! running");
else
appendPQExpBuffer(&details, "! running as primary");
}
}
else
{
/* node is unreachable but marked active*/
if (cell->node_info->active == true)
appendPQExpBuffer(&details, "? unreachable");
else
appendPQExpBuffer(&details, "- failed");
}
}
break;
case BDR:
{
}
break;
case UNKNOWN:
{
}
break;
}
strncpy(cell->node_info->details, details.data, MAXLEN);
termPQExpBuffer(&details);
PQfinish(cell->node_info->conn);
headers_show[ROLE_HEADER].cur_length = strlen(cell->node_info->details);
headers_show[NAME_HEADER].cur_length = strlen(cell->node_info->node_name);
headers_show[UPSTREAM_NAME_HEADER].cur_length = strlen(cell->node_info->upstream_node_name);
headers_show[CONNINFO_HEADER].cur_length = strlen(cell->node_info->conninfo);
headers_show[SHOW_ROLE].cur_length = strlen(get_node_type_string(cell->node_info->type));
headers_show[SHOW_NAME].cur_length = strlen(cell->node_info->node_name);
headers_show[SHOW_STATUS].cur_length = strlen(cell->node_info->details);
headers_show[SHOW_UPSTREAM_NAME].cur_length = strlen(cell->node_info->upstream_node_name);
headers_show[SHOW_CONNINFO].cur_length = strlen(cell->node_info->conninfo);
for (i = 0; i < SHOW_HEADER_COUNT; i++)
{
@@ -166,10 +263,12 @@ do_cluster_show(void)
}
else
{
printf( " %-*s ", headers_show[ROLE_HEADER].max_length, cell->node_info->details);
printf("| %-*s ", headers_show[NAME_HEADER].max_length, cell->node_info->node_name);
printf("| %-*s ", headers_show[UPSTREAM_NAME_HEADER].max_length , cell->node_info->upstream_node_name);
printf("| %-*s\n", headers_show[CONNINFO_HEADER].max_length, cell->node_info->conninfo);
printf( " %-*i ", headers_show[SHOW_ID].max_length, cell->node_info->node_id);
printf("| %-*s ", headers_show[SHOW_NAME].max_length, cell->node_info->node_name);
printf("| %-*s ", headers_show[SHOW_ROLE].max_length, get_node_type_string(cell->node_info->type));
printf("| %-*s ", headers_show[SHOW_STATUS].max_length, cell->node_info->details);
printf("| %-*s ", headers_show[SHOW_UPSTREAM_NAME].max_length , cell->node_info->upstream_node_name);
printf("| %-*s\n", headers_show[SHOW_CONNINFO].max_length, cell->node_info->conninfo);
}
}