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Code Issues Releases Wiki Activity

Set a LMDB mapsize and also provide a config option to control it (#44954)

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This commit is contained in:
Mukund Sivaraman 2017-04-26 23:43:35 +05:30
parent c118d16a1c
commit 241b49e611
18 changed files with 233 additions and 12 deletions
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7
CHANGES
View File

@ -1,3 +1,10 @@
4611. [bug] The default LMDB mapsize was too low and caused
errors after few thousand zones were added using
rndc addzone. A new config option "lmdb-mapsize"
has been introduced to configure the LMDB
mapsize depending on operational needs.
[RT #44954]
4610. [func] The "new-zones-directory" option specifies the
location of NZF or NZD files for storing
configuration of zones added by "rndc addzone".

1
bin/named/config.c
View File

@ -176,6 +176,7 @@ options {\n\
zero-no-soa-ttl-cache no;\n\
nsec3-test-zone no;\n\
allow-new-zones no;\n\
lmdb-mapsize 32M;\n\
fetches-per-server 0;\n\
require-server-cookie no;\n\
v6-bias 50;\n\

6
bin/named/named.conf.docbook
View File

@ -1,5 +1,5 @@
<!--
- Copyright (C) 2004-2017 Internet Systems Consortium, Inc. ("ISC")
- Copyright (C) 2004-2017 Internet Systems Consortium, Inc. ("ISC")
-
- This Source Code Form is subject to the terms of the Mozilla Public
- License, v. 2.0. If a copy of the MPL was not distributed with this
@ -10,7 +10,7 @@
<refentry xmlns:db="http://docbook.org/ns/docbook" version="5.0" xml:id="man.named.conf">
<info>
<date>2017-03-08</date>
<date>2017-04-25</date>
</info>
<refentryinfo>
<corpname>ISC</corpname>
@ -320,6 +320,7 @@ options {
listen-on-v6 <optional> port <replaceable>integer</replaceable> </optional> <optional> dscp
<replaceable>integer</replaceable> </optional> {
<replaceable>address_match_element</replaceable>; ... };
lmdb-mapsize <replaceable>sizeval</replaceable>;
lock-file ( <replaceable>quoted_string</replaceable> | none );
managed-keys-directory <replaceable>quoted_string</replaceable>;
masterfile-format ( map | raw | text );
@ -636,6 +637,7 @@ view <replaceable>string</replaceable> <optional> <replaceable>class</replaceabl
};
key-directory <replaceable>quoted_string</replaceable>;
lame-ttl <replaceable>ttlval</replaceable>;
lmdb-mapsize <replaceable>sizeval</replaceable>;
managed-keys { <replaceable>string</replaceable> <replaceable>string</replaceable>
<replaceable>integer</replaceable> <replaceable>integer</replaceable> <replaceable>integer</replaceable>
<replaceable>quoted_string</replaceable>; ... };

74
bin/named/server.c
View File

@ -6631,7 +6631,9 @@ setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
const cfg_obj_t *nz = NULL;
const cfg_obj_t *nzdir = NULL;
const char *dir = NULL;
const cfg_obj_t *obj = NULL;
int i = 0;
isc_uint64_t mapsize = 0ULL;
REQUIRE (config != NULL);
@ -6665,6 +6667,32 @@ setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
dns_view_setnewzonedir(view, dir);
}
#ifdef HAVE_LMDB
result = ns_config_get(maps, "lmdb-mapsize", &obj);
if (result == ISC_R_SUCCESS && obj != NULL) {
mapsize = cfg_obj_asuint64(obj);
if (mapsize < (1ULL << 20)) { /* 1 megabyte */
cfg_obj_log(obj, ns_g_lctx,
ISC_LOG_ERROR,
"'lmdb-mapsize "
"%" ISC_PRINT_QUADFORMAT "d' "
"is too small",
mapsize);
return (ISC_R_FAILURE);
} else if (mapsize > (1ULL << 40)) { /* 1 terabyte */
cfg_obj_log(obj, ns_g_lctx,
ISC_LOG_ERROR,
"'lmdb-mapsize "
"%" ISC_PRINT_QUADFORMAT "d' "
"is too large",
mapsize);
return (ISC_R_FAILURE);
}
}
#else
UNUSED(obj);
#endif /* HAVE_LMDB */
/*
* A non-empty catalog-zones statement implies allow-new-zones
*/
@ -6680,7 +6708,7 @@ setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
}
if (!allow) {
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL, 0ULL);
if (num_zones != NULL)
*num_zones = 0;
return (ISC_R_SUCCESS);
@ -6688,14 +6716,14 @@ setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
nzcfg = isc_mem_get(view->mctx, sizeof(*nzcfg));
if (nzcfg == NULL) {
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL, 0ULL);
return (ISC_R_NOMEMORY);
}
memset(nzcfg, 0, sizeof(*nzcfg));
result = dns_view_setnewzones(view, ISC_TRUE, nzcfg,
newzone_cfgctx_destroy);
newzone_cfgctx_destroy, mapsize);
if (result != ISC_R_SUCCESS) {
isc_mem_free(view->mctx, nzcfg);
return (result);
@ -11140,11 +11168,25 @@ nzd_save(MDB_txn **txnp, MDB_dbi dbi, dns_zone_t *zone,
const cfg_obj_t *zoptions;
result = isc_buffer_allocate(view->mctx, &text, 256);
if (result != ISC_R_SUCCESS)
if (result != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_ERROR,
"Unable to allocate buffer in "
"nzd_save(): %s",
isc_result_totext(result));
goto cleanup;
}
zoptions = cfg_tuple_get(zconfig, "options");
if (zoptions == NULL) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_ERROR,
"Unable to get options from config in "
"nzd_save()");
result = ISC_R_FAILURE;
goto cleanup;
}
@ -11177,8 +11219,16 @@ nzd_save(MDB_txn **txnp, MDB_dbi dbi, dns_zone_t *zone,
(void) mdb_txn_abort(*txnp);
else {
status = mdb_txn_commit(*txnp);
if (status != 0)
if (status != 0) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_ERROR,
"Error committing "
"NZD database: %s",
mdb_strerror(status));
result = ISC_R_FAILURE;
}
}
*txnp = NULL;
@ -11694,8 +11744,18 @@ do_addzone(ns_server_t *server, ns_cfgctx_t *cfg, dns_view_t *view,
if (view->redirect == NULL)
CHECK(ISC_R_NOTFOUND);
dns_zone_attach(view->redirect, &zone);
} else
CHECK(dns_zt_find(view->zonetable, name, 0, NULL, &zone));
} else {
result = dns_zt_find(view->zonetable, name, 0, NULL, &zone);
if (result != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_ERROR,
"added new zone was not found: %s",
isc_result_totext(result));
goto cleanup;
}
}
#ifndef HAVE_LMDB
/*

11
bin/tests/system/checkconf/bad-lmdb-mapsize-bogus.conf Normal file
View File

@ -0,0 +1,11 @@
/*
* Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
options {
lmdb-mapsize bogusvalue;
};

11
bin/tests/system/checkconf/bad-lmdb-mapsize-toolarge.conf Normal file
View File

@ -0,0 +1,11 @@
/*
* Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
options {
lmdb-mapsize 2048G;
};

11
bin/tests/system/checkconf/bad-lmdb-mapsize-toosmall.conf Normal file
View File

@ -0,0 +1,11 @@
/*
* Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
options {
lmdb-mapsize 1;
};

11
bin/tests/system/checkconf/bad-lmdb-mapsize-unlimited.conf Normal file
View File

@ -0,0 +1,11 @@
/*
* Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
options {
lmdb-mapsize unlimited;
};

11
bin/tests/system/checkconf/good-lmdb-mapsize-largest.conf Normal file
View File

@ -0,0 +1,11 @@
/*
* Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
options {
lmdb-mapsize 1024G;
};

11
bin/tests/system/checkconf/good-lmdb-mapsize-smallest.conf Normal file
View File

@ -0,0 +1,11 @@
/*
* Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
options {
lmdb-mapsize 1M;
};

34
doc/arm/Bv9ARM-book.xml
View File

@ -5085,6 +5085,31 @@ badresp:1,adberr:0,findfail:0,valfail:0]
</listitem>
</varlistentry>
<varlistentry>
<term><command>lmdb-mapsize</command></term>
<listitem>
<para>
When <command>named</command> is built with liblmdb,
this option sets a maximum size for the memory map of
the new-zone database (NZD) in LMDB database format.
This database is used to store configuration information
for zones added using <command>rndc addzone</command>.
Note that this is not the NZD database file size, but
the largest size that the database may grow to.
</para>
<para>
Because the database file is memory mapped, its size is
limited by the address space of the named process. The
default of 32 megabytes was chosen to be usable with
32-bit <command>named</command> builds. The largest
permitted value is 1 terabyte. Given typical zone
configurations without elaborate ACLs, a 32 MB NZD file
ought to be able to hold configurations of about 100,000
zones.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><command>managed-keys-directory</command></term>
<listitem>
@ -5954,6 +5979,15 @@ options {
incompatible with use as a file name, in which case a
cryptographic hash of the view name is used instead.
</para>
<para>
Zones added at runtime will have their configuration
stored either in a new-zone file (NZF) or a new-zone
database (NZD) depending on whether
<command>named</command> was linked with
liblmdb at compile time.
See <xref linkend="man.rndc"/> for further details
about <command>rndc addzone</command>.
</para>
</listitem>
</varlistentry>

2
doc/misc/options
View File

@ -207,6 +207,7 @@ options {
listen-on-v6 [ port <integer> ] [ dscp
<integer> ] {
<address_match_element>; ... }; // may occur multiple times
lmdb-mapsize <sizeval>;
lock-file ( <quoted_string> | none );
maintain-ixfr-base <boolean>; // obsolete
managed-keys-directory <quoted_string>;
@ -527,6 +528,7 @@ view <string> [ <class> ] {
}; // may occur multiple times
key-directory <quoted_string>;
lame-ttl <ttlval>;
lmdb-mapsize <sizeval>;
maintain-ixfr-base <boolean>; // obsolete
managed-keys { <string> <string>
<integer> <integer> <integer>

25
lib/bind9/check.c
View File

@ -22,6 +22,7 @@
#include <isc/netaddr.h>
#include <isc/parseint.h>
#include <isc/platform.h>
#include <isc/print.h>
#include <isc/region.h>
#include <isc/result.h>
#include <isc/sha1.h>
@ -1490,6 +1491,30 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
}
#endif
obj = NULL;
(void)cfg_map_get(options, "lmdb-mapsize", &obj);
if (obj != NULL) {
isc_uint64_t mapsize = cfg_obj_asuint64(obj);
if (mapsize < (1ULL << 20)) { /* 1 megabyte */
cfg_obj_log(obj, logctx,
ISC_LOG_ERROR,
"'lmdb-mapsize "
"%" ISC_PRINT_QUADFORMAT "d' "
"is too small",
mapsize);
return (ISC_R_RANGE);
} else if (mapsize > (1ULL << 40)) { /* 1 terabyte */
cfg_obj_log(obj, logctx,
ISC_LOG_ERROR,
"'lmdb-mapsize "
"%" ISC_PRINT_QUADFORMAT "d' "
"is too large",
mapsize);
return (ISC_R_RANGE);
}
}
return (result);
}

2
lib/dns/include/dns/view.h
View File

@ -1216,7 +1216,7 @@ dns_view_untrust(dns_view_t *view, const dns_name_t *keyname,
isc_result_t
dns_view_setnewzones(dns_view_t *view, isc_boolean_t allow, void *cfgctx,
void (*cfg_destroy)(void **));
void (*cfg_destroy)(void **), isc_uint64_t mapsize);
/*%<
* Set whether or not to allow zones to be created or deleted at runtime.
*

12
lib/dns/view.c
View File

@ -503,7 +503,7 @@ destroy(dns_view_t *view) {
if (view->dtenv != NULL)
dns_dt_detach(&view->dtenv);
#endif /* HAVE_DNSTAP */
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL, 0ULL);
if (view->new_zone_file != NULL) {
isc_mem_free(view->mctx, view->new_zone_file);
view->new_zone_file = NULL;
@ -2031,7 +2031,7 @@ nz_legacy(const char *directory, const char *viewname,
isc_result_t
dns_view_setnewzones(dns_view_t *view, isc_boolean_t allow, void *cfgctx,
void (*cfg_destroy)(void **))
void (*cfg_destroy)(void **), isc_uint64_t mapsize)
{
isc_result_t result;
char buffer[1024];
@ -2088,6 +2088,14 @@ dns_view_setnewzones(dns_view_t *view, isc_boolean_t allow, void *cfgctx,
goto out;
}
if (mapsize != 0ULL) {
status = mdb_env_set_mapsize(env, mapsize);
if (status != 0) {
result = ISC_R_FAILURE;
goto out;
}
}
status = mdb_env_open(env, view->new_zone_db,
MDB_NOSUBDIR|MDB_CREATE, 0600);
if (status != 0) {

3
lib/isccfg/include/isccfg/grammar.h
View File

@ -48,6 +48,9 @@
#define CFG_CLAUSEFLAG_NOTCONFIGURED 0x00000080
/*% A option for a experimental feature. */
#define CFG_CLAUSEFLAG_EXPERIMENTAL 0x00000100
/*% A configuration option that is ineffective due to
* compile time options, but is harmless. */
#define CFG_CLAUSEFLAG_NOOP 0x00000200
typedef struct cfg_clausedef cfg_clausedef_t;
typedef struct cfg_tuplefielddef cfg_tuplefielddef_t;

6
lib/isccfg/namedconf.c
View File

@ -134,6 +134,7 @@ static cfg_type_t cfg_type_server_key_kludge;
static cfg_type_t cfg_type_size;
static cfg_type_t cfg_type_sizenodefault;
static cfg_type_t cfg_type_sizeorpercent;
static cfg_type_t cfg_type_sizeval;
static cfg_type_t cfg_type_sockaddr4wild;
static cfg_type_t cfg_type_sockaddr6wild;
static cfg_type_t cfg_type_statschannels;
@ -1882,6 +1883,11 @@ view_clauses[] = {
#endif
{ "ixfr-from-differences", &cfg_type_ixfrdifftype, 0 },
{ "lame-ttl", &cfg_type_ttlval, 0 },
#ifdef HAVE_LMDB
{ "lmdb-mapsize", &cfg_type_sizeval, 0 },
#else
{ "lmdb-mapsize", &cfg_type_sizeval, CFG_CLAUSEFLAG_NOOP },
#endif
{ "nocookie-udp-size", &cfg_type_uint32, 0 },
{ "nosit-udp-size", &cfg_type_uint32, CFG_CLAUSEFLAG_OBSOLETE },
{ "max-acache-size", &cfg_type_sizenodefault,

7
lib/isccfg/parser.c
View File

@ -1717,6 +1717,12 @@ cfg_parse_mapbody(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret)
cfg_parser_warning(pctx, 0, "option '%s' is "
"not implemented", clause->name);
if ((clause->flags & CFG_CLAUSEFLAG_NOOP) != 0) {
cfg_parser_warning(pctx, 0, "option '%s' was not "
"enabled at compile time "
"(ignored)", clause->name);
}
if ((clause->flags & CFG_CLAUSEFLAG_NOTCONFIGURED) != 0) {
cfg_parser_warning(pctx, 0, "option '%s' was not "
"enabled at compile time",
@ -1973,6 +1979,7 @@ static struct flagtext {
{ CFG_CLAUSEFLAG_NOTCONFIGURED, "not configured" },
{ CFG_CLAUSEFLAG_MULTI, "may occur multiple times" },
{ CFG_CLAUSEFLAG_EXPERIMENTAL, "experimental" },
{ CFG_CLAUSEFLAG_NOOP, "non-operational" },
{ 0, NULL }
};