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Go Back   Linux Archive > Redhat > Cluster Development

 
 
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Old 11-30-2011, 11:51 AM
"Fabio M. Di Nitto"
 
Default config: drastically improve cman RRP configuration handling

From: "Fabio M. Di Nitto" <fdinitto@redhat.com>

- don't allow configuration of more than 2 rings
- allow overrided of alternate mcast address and port via
envars
- when using broadcast, set different ports on second ring.
this also required a substantial change in transport handling
- add support for
<cman>
<multicast addr= port= ttl=/>
<altmulticast addr= port= ttl=/>
</cman>
- don't allow overlap of addresses/ports
- remove redundant port settings in cman
- change relaxng schema to reflect above changes

Resolves: rhbz#733298

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
---
cman/daemon/cman-preconfig.c | 217 +++++++++++++++++++++-------------
config/tools/xml/cluster.rng.in.head | 64 +++++++---
2 files changed, 182 insertions(+), 99 deletions(-)

diff --git a/cman/daemon/cman-preconfig.c b/cman/daemon/cman-preconfig.c
index fb534a9..0ced1bb 100644
--- a/cman/daemon/cman-preconfig.c
+++ b/cman/daemon/cman-preconfig.c
@@ -50,14 +50,19 @@ static char nodename[MAX_CLUSTER_MEMBER_NAME_LEN];
static int nodeid;
static int two_node;
static unsigned int disable_openais;
-static unsigned int portnum;
static int num_nodenames;
static char *key_filename=NULL;
-static char *mcast_name;
static char *cluster_name;
static char error_reason[1024] = { '' };
static hdb_handle_t cluster_parent_handle;
static int use_hashed_cluster_id = 0;
+static unsigned int portnum = 0;
+static unsigned int altportnum = 0;
+static char *mcast_name = NULL;
+static char *altmcast_name = NULL;
+static unsigned int ttl = 1;
+static unsigned int altttl = 1;
+

/*
* Exports the interface for the service
@@ -279,7 +284,7 @@ static int add_udpu_members(struct objdb_iface_ver0 *objdb, hdb_handle_t interfa
#define PRIMARY_IFACE 0
#define ALT_IFACE 1

-static int add_ifaddr(struct objdb_iface_ver0 *objdb, char *mcast, char *ifaddr, int port, int ttl, int altiface, enum tx_mech transport)
+static int add_ifaddr(struct objdb_iface_ver0 *objdb, char *mcast, char *ifaddr, int port, int intttl, int altiface, enum tx_mech transport)
{
hdb_handle_t totem_object_handle;
hdb_handle_t find_handle;
@@ -295,6 +300,11 @@ static int add_ifaddr(struct objdb_iface_ver0 *objdb, char *mcast, char *ifaddr,
[TX_MECH_RDMA] = "iba",
};

+ if (num_interfaces >= 2) {
+ snprintf(error_reason, sizeof(error_reason) - 1, "Configuration of more than 2 rings is not supported");
+ return -1;
+ }
+
/* Check the families match */
if (address_family(mcast, &mcast_addr, 0) !=
address_family(ifaddr, &if_addr, mcast_addr.ss_family)) {
@@ -364,14 +374,14 @@ static int add_ifaddr(struct objdb_iface_ver0 *objdb, char *mcast, char *ifaddr,
tmp, strlen(tmp)+1, OBJDB_VALUETYPE_STRING);

/* paranoia check. corosync already does it */
- if ((ttl < 0) || (ttl > 255)) {
- sprintf(error_reason, "TTL value (%u) out of range (0 - 255)", ttl);
+ if ((intttl < 0) || (intttl > 255)) {
+ sprintf(error_reason, "TTL value (%u) out of range (0 - 255)", intttl);
return -1;
}

/* add the key to the objdb only if value is not default */
- if (ttl != 1) {
- sprintf(tmp, "%d", ttl);
+ if (intttl != 1) {
+ sprintf(tmp, "%d", intttl);
objdb->object_key_create_typed(interface_object_handle , "ttl",
tmp, strlen(tmp)+1, OBJDB_VALUETYPE_STRING);
}
@@ -418,11 +428,11 @@ static char *default_mcast(char *node, int altiface)

if (family == AF_INET) {
snprintf(addr, sizeof(addr), "239.192.%d.%d", clusterid >> 8, clusterid % 0xFF);
- return addr;
+ return strdup(addr);
}
if (family == AF_INET6) {
snprintf(addr, sizeof(addr), "ff15::%x", clusterid);
- return addr;
+ return strdup(addr);
}

return NULL;
@@ -568,6 +578,11 @@ static int get_env_overrides(void)
portnum = atoi(getenv("CMAN_IP_PORT"));
}

+ /* optional alternate port */
+ if (getenv("CMAN_IP_ALTPORT")) {
+ altportnum = atoi(getenv("CMAN_IP_ALTPORT"));
+ }
+
/* optional security key filename */
if (getenv("CMAN_KEYFILE")) {
key_filename = strdup(getenv("CMAN_KEYFILE"));
@@ -591,6 +606,10 @@ static int get_env_overrides(void)
mcast_name = getenv("CMAN_MCAST_ADDR");
}

+ if (getenv("CMAN_ALTMCAST_ADDR")) {
+ altmcast_name = getenv("CMAN_ALTMCAST_ADDR");
+ }
+
if (getenv("CMAN_2NODE")) {
two_node = 1;
expected_votes = 1;
@@ -612,11 +631,15 @@ static int get_nodename(struct objdb_iface_ver0 *objdb)
hdb_handle_t object_handle;
hdb_handle_t find_handle;
hdb_handle_t node_object_handle;
+ hdb_handle_t mcast_handle;
hdb_handle_t alt_object;
enum tx_mech transport = TX_MECH_UDP;
char *str;
int error;
- unsigned int ttl = 1;
+ unsigned int mcast_portnum = DEFAULT_PORT;
+ unsigned int altmcast_portnum = DEFAULT_PORT;
+ char *altmcast_name_tmp = NULL;
+ int broadcast = 0;

if (!getenv("CMAN_NOCONFIG")) {
/* our nodename */
@@ -665,7 +688,7 @@ static int get_nodename(struct objdb_iface_ver0 *objdb)
}

/* Add <cman> bits to pass down to the main module*/
- if ( (node_object_handle = nodelist_byname(objdb, cluster_parent_handle, nodename))) {
+ if ((node_object_handle = nodelist_byname(objdb, cluster_parent_handle, nodename))) {
if (objdb_get_string(objdb, node_object_handle, "nodeid", &nodeid_str)) {
sprintf(error_reason, "This node has no nodeid in cluster.conf");
write_cman_pipe("This node has no nodeid in cluster.conf");
@@ -674,85 +697,103 @@ static int get_nodename(struct objdb_iface_ver0 *objdb)
}

objdb->object_find_create(cluster_parent_handle, "cman", strlen("cman"), &find_handle);
-
- if (objdb->object_find_next(find_handle, &object_handle) == 0) {
-
- hdb_handle_t mcast_handle;
- hdb_handle_t find_handle2;
-
- if (!mcast_name) {
-
- objdb->object_find_create(object_handle, "multicast", strlen("multicast"), &find_handle2);
- if (objdb->object_find_next(find_handle2, &mcast_handle) == 0) {
-
- objdb_get_string(objdb, mcast_handle, "addr", &mcast_name);
- objdb_get_int(objdb, mcast_handle, "ttl", &ttl, ttl);
- }
- objdb->object_find_destroy(find_handle2);
- }
-
- if (!mcast_name) {
- mcast_name = default_mcast(nodename, PRIMARY_IFACE);
-
- }
- if (!mcast_name)
- return -1;
-
- /* See if the user wants our default set of openais services (default=yes) */
- objdb_get_int(objdb, object_handle, "disable_openais", &disable_openais, 0);
-
- objdb->object_key_create_typed(object_handle, "nodename",
- nodename, strlen(nodename)+1, OBJDB_VALUETYPE_STRING);
+ if (objdb->object_find_next(find_handle, &object_handle)) {
+ sprintf(error_reason, "Unable to find cman in config db");
+ write_cman_pipe(error_reason);
+ return -1;
}
objdb->object_find_destroy(find_handle);

- nodeid = atoi(nodeid_str);
- error = 0;
-
- /* optional port */
- if (!portnum) {
- objdb_get_int(objdb, object_handle, "port", &portnum, DEFAULT_PORT);
- }
-
/* Check for broadcast */
if (!objdb_get_string(objdb, object_handle, "broadcast", &str)) {
if (strcmp(str, "yes") == 0) {
- mcast_name = strdup("255.255.255.255");
- if (!mcast_name)
- return -1;
+ broadcast = 1;
transport = TX_MECH_UDPB;
}
}

/* Check for transport */
if (!objdb_get_string(objdb, object_handle, "transport", &str)) {
+ if ((broadcast) && (strcmp(str, "udpb"))) {
+ sprintf(error_reason, "Transport and broadcast option are mutually exclusive");
+ write_cman_pipe(error_reason);
+ return -1;
+ }
if (strcmp(str, "udp") == 0) {
- if (transport != TX_MECH_UDPB) {
- transport = TX_MECH_UDP;
- }
+ transport = TX_MECH_UDP;
} else if (strcmp(str, "udpb") == 0) {
+ broadcast = 1;
transport = TX_MECH_UDPB;
} else if (strcmp(str, "udpu") == 0) {
- if (transport != TX_MECH_UDPB) {
- transport = TX_MECH_UDPU;
- } else {
- sprintf(error_reason, "Transport and broadcast option are mutually exclusive");
- write_cman_pipe("Transport and broadcast option are mutually exclusive");
- return -1;
- }
+ transport = TX_MECH_UDPU;
} else if (strcmp(str, "rdma") == 0) {
- if (transport != TX_MECH_UDPB) {
- transport = TX_MECH_RDMA;
- } else {
- sprintf(error_reason, "Transport and broadcast option are mutually exclusive");
- write_cman_pipe("Transport and broadcast option are mutually exclusive");
- return -1;
- }
+ transport = TX_MECH_RDMA;
} else {
sprintf(error_reason, "Transport option value can be one of udp, udpb, udpu, rdma");
- write_cman_pipe("Transport option value can be one of udp, udpb, udpu, rdma");
+ write_cman_pipe(error_reason);
+ return -1;
+ }
+ }
+
+ if (broadcast) {
+ mcast_name = strdup("255.255.255.255");
+ if (!mcast_name) {
+ sprintf(error_reason, "Unable to set mcast_name");
+ write_cman_pipe(error_reason);
+ return -1;
+ }
+ altmcast_name = strdup("255.255.255.255");
+ if (!altmcast_name) {
+ sprintf(error_reason, "Unable to set altmcast_name");
+ write_cman_pipe(error_reason);
return -1;
}
+ altmcast_portnum = DEFAULT_PORT + 2;
+ }
+
+ objdb->object_find_create(object_handle, "multicast", strlen("multicast"), &find_handle);
+ if (objdb->object_find_next(find_handle, &mcast_handle) == 0) {
+ if (!mcast_name)
+ objdb_get_string(objdb, mcast_handle, "addr", &mcast_name);
+ objdb_get_int(objdb, mcast_handle, "ttl", &ttl, ttl);
+ objdb_get_int(objdb, mcast_handle, "port", &mcast_portnum, DEFAULT_PORT);
+ }
+ objdb->object_find_destroy(find_handle);
+
+ if (!mcast_name) {
+ mcast_name = default_mcast(nodename, PRIMARY_IFACE);
+ }
+
+ if (!mcast_name) {
+ sprintf(error_reason, "Unable to set mcast_name");
+ write_cman_pipe(error_reason);
+ return -1;
+ }
+
+ objdb->object_find_create(object_handle, "altmulticast", strlen("altmulticast"), &find_handle);
+ if (objdb->object_find_next(find_handle, &mcast_handle) == 0) {
+ objdb_get_string(objdb, mcast_handle, "addr", &altmcast_name_tmp);
+ objdb_get_int(objdb, mcast_handle, "ttl", &altttl, ttl);
+ if (!broadcast) {
+ objdb_get_int(objdb, mcast_handle, "port", &altmcast_portnum, DEFAULT_PORT);
+ } else {
+ objdb_get_int(objdb, mcast_handle, "port", &altmcast_portnum, DEFAULT_PORT + 2);
+ }
+ }
+ objdb->object_find_destroy(find_handle);
+
+ /* See if the user wants our default set of openais services (default=yes) */
+ objdb_get_int(objdb, object_handle, "disable_openais", &disable_openais, 0);
+
+ objdb->object_key_create_typed(object_handle, "nodename",
+ nodename, strlen(nodename)+1, OBJDB_VALUETYPE_STRING);
+
+ nodeid = atoi(nodeid_str);
+ error = 0;
+
+ /* optional port */
+ if (!portnum) {
+ objdb_get_int(objdb, object_handle, "port", &portnum, mcast_portnum);
}

if (add_ifaddr(objdb, mcast_name, nodename, portnum, ttl,
@@ -765,24 +806,43 @@ static int get_nodename(struct objdb_iface_ver0 *objdb)
num_nodenames = 1;
objdb->object_find_create(node_object_handle,"altname" , strlen("altname"), &find_handle);
while (objdb->object_find_next(find_handle, &alt_object) == 0) {
- unsigned int port;
- unsigned int altttl = 1;
char *node;
- char *mcast;

if (objdb_get_string(objdb, alt_object, "name", &node)) {
continue;
}

- objdb_get_int(objdb, alt_object, "port", &port, portnum);
+ objdb_get_int(objdb, alt_object, "port", &altportnum, altmcast_portnum);

- objdb_get_int(objdb, alt_object, "ttl", &altttl, ttl);
+ objdb_get_int(objdb, alt_object, "ttl", &altttl, altttl);

- if (objdb_get_string(objdb, alt_object, "mcast", &mcast)) {
- mcast = default_mcast(nodename, ALT_IFACE);
+ if (!altmcast_name) {
+ if (objdb_get_string(objdb, alt_object, "mcast", &altmcast_name)) {
+ if (altmcast_name_tmp) {
+ altmcast_name = altmcast_name_tmp;
+ } else {
+ altmcast_name = default_mcast(nodename, ALT_IFACE);
+ }
+ }
+ }
+
+ if (!altmcast_name) {
+ sprintf(error_reason, "Unable to determine alternate multicast name");
+ write_cman_pipe(error_reason);
+ return -1;
}

- if (add_ifaddr(objdb, mcast, node, portnum, altttl,
+ if (!strcmp(altmcast_name, mcast_name) &&
+ ((altportnum == portnum) || (altportnum == portnum - 1) || (portnum == altportnum - 1))) {
+ sprintf(error_reason, "Alternate communication channel (mcast: %s ports: %d,%d) cannot use
"
+ "same address and ports of primary channel (mcast: %s ports: %d,%d)",
+ altmcast_name, altportnum, altportnum - 1,
+ mcast_name, portnum, portnum - 1);
+ write_cman_pipe(error_reason);
+ return -1;
+ }
+
+ if (add_ifaddr(objdb, altmcast_name, node, altportnum, altttl,
ALT_IFACE, transport)) {
write_cman_pipe(error_reason);
return -1;
@@ -1310,9 +1370,6 @@ static int get_cman_globals(struct objdb_iface_ver0 *objdb)
/* Get the <cman> bits that override <totem> bits */
objdb->object_find_create(cluster_parent_handle, "cman", strlen("cman"), &find_handle);
if (objdb->object_find_next(find_handle, &object_handle) == 0) {
- if (!portnum)
- objdb_get_int(objdb, object_handle, "port", &portnum, DEFAULT_PORT);
-
if (!key_filename)
objdb_get_string(objdb, object_handle, "keyfile", &key_filename);

diff --git a/config/tools/xml/cluster.rng.in.head b/config/tools/xml/cluster.rng.in.head
index 11d5052..a669c98 100644
--- a/config/tools/xml/cluster.rng.in.head
+++ b/config/tools/xml/cluster.rng.in.head
@@ -144,26 +144,25 @@ To validate your cluster.conf against this schema, run:
</optional>
<optional>
<element name="multicast" rha:description="The multicast element
- provides the ability for a user to specify a multicast address
- instead of using the multicast address generated by cman. If
+ provides the ability for a user to specify a multicast address,
+ port and TTL (Time To Live) instead of using cman defaults. If
a user does not specify a multicast address, cman creates one. It
- forms the upper 16 bits of the multicast address with 239.192 and
- forms the lower 16 bits based on the cluster ID.">
- <optional>
- <attribute name="addr" rha:description="A multicast address specified
- by a user. If you do specify a multicast address, you should
- use the 239.192.x.x series that cman uses. Otherwise, using a
- multicast address outside that range may cause unpredictable
- results. For example, using 224.0.0.x (All hosts on the network)
- may not be routed correctly, or even routed at all by some
- hardware." rha:sample="239.192.0.1"/>
- </optional>
- <optional>
- <attribute name="ttl" rha:description="Define the TTL (time to live) of
- a multicast packets. Useful only if nodes are on different subnets and
- a multicast router is available in between." rha:default="1"
- rha:sample="24"/>
- </optional>
+ forms the upper 16 bits of the multicast address with 239.192 for
+ IPv4 and ff15:: for IPv6 and forms the lower 16 bits based on
+ the cluster ID.">
+ <ref name="MULTICASTOPTS"/>
+ </element>
+ </optional>
+ <optional>
+ <element name="altmulticast" rha:description="The altmulticast element
+ provides the ability for a user to specify a multicast address,
+ port and TTL (Time To Live) instead of using cman defaults for
+ the alternate communication channel (RRP). If a user does not
+ specify an alternate multicast address, cman creates one. It
+ forms the upper 16 bits of the multicast address with 239.192 for
+ IPv4 and ff15:: for IPv6 and forms the lower 16 bits based on
+ the cluster ID + 1.">
+ <ref name="MULTICASTOPTS"/>
</element>
</optional>
</element>
@@ -1013,6 +1012,33 @@ To validate your cluster.conf against this schema, run:
</element> <!-- cluster end -->
</start>

+<!-- begin mcast definitions -->
+
+ <define name="MULTICASTOPTS">
+ <optional>
+ <attribute name="addr" rha:description="A multicast address specified
+ by a user. If you do specify a multicast address, you should
+ use the 239.192.x.x series that cman uses. Otherwise, using a
+ multicast address outside that range may cause unpredictable
+ results. For example, using 224.0.0.x (All hosts on the network)
+ may not be routed correctly, or even routed at all by some
+ hardware." rha:sample="239.192.0.1"/>
+ </optional>
+ <optional>
+ <attribute name="ttl" rha:description="Define the TTL (time to live) of
+ a multicast packets. Useful only if nodes are on different subnets and
+ a multicast router is available in between." rha:default="1"
+ rha:sample="24"/>
+ </optional>
+ <optional>
+ <attribute name="port">
+ <data type="nonNegativeInteger"/>
+ </attribute>
+ </optional>
+ </define>
+
+<!-- end mcast definitions -->
+
<!-- begin node altname definitions -->

<define name="ALTNAME">
--
1.7.7.3
 

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