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This plugin is GPL2 or greater as generally found in Nagios.
(this is obviously compatible with GPL3 or greater).
(This used to be ctdb commit df1ac1cfd65f32743ca2588edfdad46ce5a4f03f)
... on Debian system and derivated.
(ctdb_diagnostics still hardcodes /etc/sysconfig/)
(This used to be ctdb commit 1341329f6125d491b82c873f793af819e677f714)
* Tue Nov 8 2011 : Version 1.12
- Add new tunable : AllowClientDBAttach that can be used to stop
client db access during maintenance operations
- Updated logging for interfaces that are missing or dont exist but are
configured to be used.
- Add timeout argument to ctdb_cmdline_client
- PDMA support
- Initial support for 'readonly' delegations for ctdb databases
This will when finished greatly improve performance for contended hot
records that are used for just read-access.
- New 'ctdb cattdb' command
- Massive updates to tests and eventscripts
- LCP2 ip allocation algorithm
- Record Fetch collapse. Collapse multiple fetch-lock requests from cients
to a single network fetch and defer other concurrent requests until the
initial fetch completes, and then service the deferred calls locally.
This will greatly improve performance for contended hot records
where clients request write-locks.
(This used to be ctdb commit bda24b7f313289404b68ce8b9177fbd6b6a05dd7)
When multiple clients fetch the same record concurrently, send only one single
fetch across the network and deferr all other fetches locally.
This improves performance for hot records and reduces cpu load on ctdb.
(This used to be ctdb commit 82d6946ad8b3348e8b9d3d971f24925ade02d1be)
This patch changes the callback signature for traversal
functions to allow a client to abort a traverse before it finishes.
Updates to all callers and examples as well as rb-test tool.
(This used to be ctdb commit 8ab0c63ad36cfbbb1e5fed46a1f4c47b1fdb581f)
A recent fix made the LCP2 algorithm try harder find a candidate
source node. The debug output shows extra output because it is trying
harder so we accommodate that.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 9a6f918bf6db79c1f8c53c0df23d47b73c117ea2)
There's a bug in LCP2. Selecting the node with the highest imbalance
doesn't always work. Some nodes can have a high imbalance metric
because they have a lot of IPs. However, these nodes can be part of a
group that is perfectly balanced. Nodes in another group with less
IPs might actually be imbalanced.
Instead of just trying the source node with the highest imbalance this
tries them in descending order of imbalance until it finds one where
an IP can be moved to another node.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 574091d5aced5e87aefad52f8bc47aa75c25fbf6)
There are 4 IPs across 2 nodes and 2 addresses across 2 other nodes.
If one of the latter nodes is unhealthy and then becomes healthy
again, an IP isn't failed back. This is because the nodes in the 1st
group are >= unbalanced then the nodes in the 2nd group.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 1d26e7cff6292fcbf63efc4628ffbb63b6f1f73c)
This mainly applies to ctdb_takeover_run_core when you might want to
specify that some IPs can only be hosted by some nodes.
Syntax on each line is now:
IP current_pnn allowed_pnns
where allowed_pnns is a comma-separated list.
allowed_pnns is optional. If not specified then address can be
assigned to all nodes that aren't included in an allowed_pnns list.
Just think of it as all PNNs and that the behaviour is undefined when
you only specify allowed_pnns for some IPs. ;-)
current_pnn is optional and defaults to -1.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit ed83604da82ebe566d6eb330ab7119e861e853c8)
There's a bug in LCP2. Selecting the node with the highest imbalance
doesn't always work. Some nodes can have a high imbalance metric
because they have a lot of IPs. However, these nodes can be part of a
group that is perfectly balanced. Nodes in another group with less
IPs might actually be imbalanced.
Factor out the code from lcp2_failback() that actually takes a node
and decides which address should be moved to which node.
This is the first step in fixing the above bug.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 75718c5768b5bb5c0bcd7dd90e0327c6ed22a63d)
If we attempt a readonly lock request for a record that do not exist (yet)
in the local TDB, then upgrade the request to ask for a write lock and force a
request for migrate the record onto the local node.
This allows the "only request record on second local request for known contended records"
heuristics to try to avoid creating readonly delegations unless we have good reason to
assume it is a contended record.
(This used to be ctdb commit e6003e52617385f731ccf93b13d21d5403534a78)
Initial readonly record support in libctdb.
New records are not yet created by the library but extising records will be delegated as readonly records.
This needs a bit more tests before we can drop the "old style" implementation of client
code in client/ctdb_client.c
(This used to be ctdb commit fb50a45a21ff56480d76acd1c33c13c323cbf5e2)
Fix bug when ctdbd updates the local copy of a delegated record to write the correct
amount of data to the record.
(This used to be ctdb commit 8814d8bc159a5e368afaa236ac7d865165db04b2)
Remove the code in the example client code that writes the record to the local tdb.
Add code to the local ctdbd processing of replies to check if this reply contain a ro delegation and if so, spawn a child process to lock the tdb and then write the data.
(This used to be ctdb commit bf1d429227dc4f5818263cc39401d0a22663cdba)
This case was never tested and fakessh obviously won't handle the
extra arguments.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 02184bd5b9ab94cdf2b9ff92e56a509f92f9e4aa)
Current behaviour is for onnode to timeout (for about 20s) for each
attempted ssh to a down node. With 40 or 50 invocations of onnode
this takes a long time.
2 changes to work around this:
* If EXTRA_SSH_OPTS (which is passed to ssh by onnode) does not
contains a ConnectTimeout= setting then add a setting for a 5 second
timeout.
* Filter the nodes before starting any diagnosis, taking out any "bad
nodes" that are uncontactable via onnode.
In the nodes summary at the beginning of the output, print
information about any "bad nodes".
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 8c3b6427dbaade87e1a0f5590f0894c2e69b31a3)
Add option -e to get the old behaviour and process empty records too.
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit d9859540c2000864bc6c58be5afe19aa3b1064b2)
Also, add -P to df, to avoid multiline on Linux when device name is long (this is the case with LVM)
(This used to be ctdb commit f4d5a5810f1a840a41c3541a3b822fce44d41e9a)
There looks to be a minor race where IPs haven't yet been reallocated
but the cluster is healthy. This should fix it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 2d6a800a789ca59fdab92422f98a4e05ba55f34c)
Node states on the command line are now comma-separated hex numbers,
so all flag states can be expressed.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 1f1534435b9d5f464604e28a8cce2cd0a779ef68)
this triggered a check for "only run the eventscript if we host the address" to trigger and shortcir=cuit calling the eventscript.
An effect of this would be that 'ctdb delip' would remove the ip from ctdb, but fail to delete it from the interface.
S1028798
(This used to be ctdb commit b82524f240bf21769dd7624ca6026763d38b9396)
1/0 is unsuitable since it can be useful to check 'if a column is "1" there is something wrong with that node'
(This used to be ctdb commit b963f5e40b1e73a60363568da88557cad9e58a28)
cant talloc off vnn since it is not yet initialized and might not always be NULL
(This used to be ctdb commit 3d37be3e2bfb61ede824028aeebaa18ba304faae)
