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[3985] Several minor tweaks, docs updated.

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This commit is contained in:
Tomek Mrugalski 2015-10-02 20:35:02 +02:00
parent 39aff6266a
commit 52de9ac39f
8 changed files with 45 additions and 23 deletions
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22
doc/guide/dhcp6-srv.xml
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@ -2676,8 +2676,30 @@ should include options from the isc option space:
</listitem>
</itemizedlist>
</para>
</section>
<section id="dhcp6-decline">
<title>Duplicate Addresses (DECLINE support)</title>
<note>
<para>@todo: Full text will be added as part of #3990.</para>
</note>
<para>
The server does not decrease assigned-addresses statistics
when Decline message is received and processed successfully. While
technically a declined address is no longer assigned, the primary usage
of the assigned-addresses statistic is to monitor pool utilization. Most
people would forget to include declined-addresses in the calculation,
and simply do assigned-addresses/total-addresses. This would have a bias
towards under-representing pool utilization. As this has a
potential for major issues, we decided not to decrease assigned
addresses immediately after receiving Decline, but to do
it later when we recover the address back to the available pool.
</para>
</section>
<section id="dhcp6-stats">
<title>Statistics in DHCPv6 server</title>
<note>

8
src/lib/dhcpsrv/alloc_engine.h
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@ -506,7 +506,7 @@ public:
/// - updating statistics of assigned and reclaimed leases
///
/// Note: declined leases fall under the same expiration/reclaimation
/// processing as normal leases. In principle, it would more elegant
/// processing as normal leases. In principle, it would be more elegant
/// to have a separate processing for declined leases reclaimation. However,
/// due to performance reasons we decided to use them together. Several
/// aspects were taken into consideration. First, normal leases are expected
@ -524,7 +524,7 @@ public:
/// declined state). Therefore remove_leases parameter is ignored for
/// declined leases. They are always removed.
///
/// Also, for delined leases @ref reclaimDeclined is called. It conducts
/// Also, for declined leases @ref reclaimDeclined is called. It conducts
/// several declined specific operation (extra log entry, stats dump,
/// hooks).
///
@ -552,7 +552,7 @@ public:
/// - updating statistics of assigned and reclaimed leases
///
/// Note: declined leases fall under the same expiration/reclaimation
/// processing as normal leases. In principle, it would more elegant
/// processing as normal leases. In principle, it would be more elegant
/// to have a separate processing for declined leases reclaimation. However,
/// due to performance reasons we decided to use them together. Several
/// aspects were taken into consideration. First, normal leases are expected
@ -570,7 +570,7 @@ public:
/// declined state). Therefore remove_leases parameter is ignored for
/// declined leases. They are always removed.
///
/// Also, for delined leases @ref reclaimDeclined is called. It conducts
/// Also, for declined leases @ref reclaimDeclined is called. It conducts
/// several declined specific operation (extra log entry, stats dump,
/// hooks).
///

10
src/lib/dhcpsrv/tests/alloc_engine_expiration_unittest.cc
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@ -990,9 +990,9 @@ public:
stat_name), int64_t(2000));
stats_mgr.setValue(stats_mgr.generateName("subnet", 1,
"reclaimed-declined-addresses"), int64_t(3000));
"reclaimed-declined-addresses"), int64_t(10000));
stats_mgr.setValue(stats_mgr.generateName("subnet", 2,
"reclaimed-declined-addresses"), int64_t(4000));
"reclaimed-declined-addresses"), int64_t(20000));
stats_mgr.setValue(stats_mgr.generateName("subnet", 1,
"declined-addresses"), int64_t(100));
@ -1021,11 +1021,11 @@ public:
testStatistics("subnet[2]." + stat_name, 2000 - subnet2_cnt);
testStatistics("subnet[1].declined-addresses", 100 - subnet1_cnt);
testStatistics("subnet[2.declined-addresses", 100 - subnet1_cnt);
testStatistics("subnet[2].declined-addresses", 200 - subnet2_cnt);
// subnet[X].reclaimed-declined-addresses should go up in each subnet
testStatistics("subnet[1].reclaimed-declined-addresses", 3000 + subnet1_cnt);
testStatistics("subnet[2].reclaimed-declined-addresses", 4000 + subnet1_cnt);
testStatistics("subnet[1].reclaimed-declined-addresses", 10000 + subnet1_cnt);
testStatistics("subnet[2].reclaimed-declined-addresses", 20000 + subnet1_cnt);
}
/// @brief Collection of leases created at construction time.

3
src/lib/dhcpsrv/tests/alloc_engine_utils.cc
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@ -59,6 +59,9 @@ bool testStatistics(const std::string& stat_name, const int64_t exp_value) {
<< "doesn't match expected value (" << exp_value << ")";
}
return (observation->getInteger().first == exp_value);
} else {
ADD_FAILURE() << "Expected statistic " << stat_name
<< " not found.";
}
} catch (...) {

8
src/lib/dhcpsrv/tests/alloc_engine_utils.h
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@ -289,7 +289,7 @@ public:
///
/// This test inserts existing_lease (if specified, may be null) into the
/// LeaseMgr, then conducts lease allocation (pretends that client
/// sent either Discover or Request, depending on fake_allocation).
/// sent either Solicit or Request, depending on fake_allocation).
/// Allocated lease is then returned (using result) for further inspection.
///
/// @param alloc_engine allocation engine
@ -315,7 +315,7 @@ public:
///
/// @param addr address of the lease
/// @param probation_period expressed in seconds
/// @param expired number of seconds where it will expire
/// @param expired number of seconds when the lease will expire
Lease6Ptr generateDeclinedLease(const std::string& addr,
time_t probation_period,
int32_t expired);
@ -448,7 +448,7 @@ public:
ExpectedResult exp_result,
Lease4Ptr& result);
/// @brief Creates a declined lease with specified expiration time
/// @brief Creates a declined IPv4 lease with specified expiration time
///
/// expired parameter controls probation period. Positive value
/// means that the lease will expire in X seconds. Negative means
@ -458,7 +458,7 @@ public:
///
/// @param addr address of the lease
/// @param probation_period expressed in seconds
/// @param expired number of seconds where it will expire
/// @param expired number of seconds when the lease will expire
Lease4Ptr generateDeclinedLease(const std::string& addr,
time_t probation_period,
int32_t expired);

3
src/lib/dhcpsrv/tests/generic_lease_mgr_unittest.cc
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@ -1,4 +1,4 @@
// Copyright (C) 2014, 2015 Internet Systems Consortium, Inc. ("ISC")
// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
@ -2393,7 +2393,6 @@ GenericLeaseMgrTest::testGetDeclinedLeases6() {
}
}
}; // namespace test
}; // namespace dhcp
}; // namespace isc

12
src/lib/dhcpsrv/tests/generic_lease_mgr_unittest.h
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@ -250,7 +250,7 @@ public:
/// Checks that the code is able to update an IPv6 lease in the database.
void testUpdateLease6();
/// @brief Check that the DHCPv6 lease can be added, removed and recreated.
/// @brief Check that the IPv6 lease can be added, removed and recreated.
///
/// This test creates a lease, removes it and then recreates it with some
/// of the attributes changed. Next it verifies that the lease in the
@ -275,7 +275,7 @@ public:
/// - reclaimed leases are not returned.
void testGetExpiredLeases4();
/// @brief Checks that the expired DHCPv6 leases can be retrieved.
/// @brief Checks that the expired IPv6 leases can be retrieved.
///
/// This test checks the following:
/// - all expired and not reclaimed leases are retured
@ -285,7 +285,7 @@ public:
/// - reclaimed leases are not returned.
void testGetExpiredLeases6();
/// @brief Checks that declined DHCPv4 leases that have expired can be retrieved.
/// @brief Checks that declined IPv4 leases that have expired can be retrieved.
///
/// This test checks that the following:
/// - all expired and not reclaimed leases are returned, regardless if
@ -295,7 +295,7 @@ public:
/// expired
void testGetDeclinedLeases4();
/// @brief Checks that declined DHCPv6 leases that have expired can be retrieved.
/// @brief Checks that declined IPv6 leases that have expired can be retrieved.
///
/// This test checks that the following:
/// - all expired and not reclaimed leases are returned, regardless if
@ -305,7 +305,7 @@ public:
/// expired
void testGetDeclinedLeases6();
/// @brief Checks that selected expired-reclaimed DHCPv6 leases
/// @brief Checks that selected expired-reclaimed IPv6 leases
/// are removed.
///
/// This creates a number of DHCPv6 leases and marks some of them
@ -313,7 +313,7 @@ public:
/// leases can be removed.
void testDeleteExpiredReclaimedLeases6();
/// @brief Checks that selected expired-reclaimed DHCPv4 leases
/// @brief Checks that selected expired-reclaimed IPv4 leases
/// are removed.
///
/// This creates a number of DHCPv4 leases and marks some of them

2
src/lib/dhcpsrv/tests/memfile_lease_mgr_unittest.cc
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@ -994,14 +994,12 @@ TEST_F(MemfileLeaseMgrTest, versionCheck) {
// Checks that declined IPv4 leases can be returned correctly.
TEST_F(MemfileLeaseMgrTest, getDeclined4) {
startBackend(V4);
testGetDeclinedLeases4();
}
// Checks that declined IPv6 leases can be returned correctly.
TEST_F(MemfileLeaseMgrTest, getDeclined6) {
startBackend(V6);
testGetDeclinedLeases6();
}