MEDIUM: checks: Implement postgres check using tcp-check rules
A shared tcp-check ruleset is now created to support postgres check. This way no
extra memory is used if several backends use a pgsql check.
The following sequence is used :
tcp-check connect default linger
tcp-check send-binary PGSQL_REQ log-format
tcp-check expect !rstring "^E" min-recv 5 \
error-status "L7RSP" on-error "%[check.payload(6,0)]"
tcp-check expect rbinary "^520000000800000000 min-recv "9" \
error-status "L7STS" \
on-success "PostgreSQL server is ok" \
on-error "PostgreSQL unknown error"
The log-format hexa string PGSQL_REQ depends on 2 preset variables, the packet
length (check.plen) and the username (check.username).
diff --git a/include/types/checks.h b/include/types/checks.h
index 541666c..9b34cbe 100644
--- a/include/types/checks.h
+++ b/include/types/checks.h
@@ -312,6 +312,7 @@
#define TCPCHK_RULES_SHARED 0x00000001 /* Set for shared list of tcp-check rules */
#define TCPCHK_RULES_DEF 0x00000002 /* Ruleset inherited from the default section */
+#define TCPCHK_RULES_PGSQL_CHK 0x00000010
#define TCPCHK_RULES_REDIS_CHK 0x00000020
#define TCPCHK_RULES_SMTP_CHK 0x00000030
#define TCPCHK_RULES_SSL3_CHK 0x00000070