[SCM] CTDB repository - branch master updated - ctdb-1.13-153-g90e8c4d
Ronnie Sahlberg
sahlberg at samba.org
Wed May 2 19:29:41 MDT 2012
The branch, master has been updated
via 90e8c4dc7d89c460ad2da5a9af1cef006db3b1c0 (commit)
from 334ea830f1bf33419f4a1e78f23afd41a852d0f4 (commit)
http://gitweb.samba.org/?p=ctdb.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit 90e8c4dc7d89c460ad2da5a9af1cef006db3b1c0
Author: Ronnie Sahlberg <ronniesahlberg at gmail.com>
Date: Thu May 3 11:06:55 2012 +1000
DOC: document the reloadips command
-----------------------------------------------------------------------
Summary of changes:
doc/ctdb.1 | 22 ++++++-
doc/ctdb.1.html | 183 +++++++++++++++++++++++++++++++-----------------------
doc/ctdb.1.xml | 44 +++++++++++++
3 files changed, 170 insertions(+), 79 deletions(-)
Changeset truncated at 500 lines:
diff --git a/doc/ctdb.1 b/doc/ctdb.1
index c75a658..2a0ec62 100644
--- a/doc/ctdb.1
+++ b/doc/ctdb.1
@@ -2,7 +2,7 @@
.\" It was generated using the DocBook XSL Stylesheets (version 1.69.1).
.\" Instead of manually editing it, you probably should edit the DocBook XML
.\" source for it and then use the DocBook XSL Stylesheets to regenerate it.
-.TH "CTDB" "1" "02/13/2012" "ctdb" "CTDB \- clustered TDB database"
+.TH "CTDB" "1" "05/03/2012" "ctdb" "CTDB \- clustered TDB database"
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
@@ -619,6 +619,26 @@ Procedure to remove a node:
.PP
5, Use 'ctdb status' on all nodes and verify that the deleted node no longer shows up in the list..
.PP
+.SS "reloadips"
+.PP
+This command is used to reload the public addresses file and update the ip configuration of the running daemon.
+.PP
+Procedure to update the public address configuration on a single node:
+.PP
+1, Update the /etc/ctdb/public_addresses file on the node
+.PP
+2, Run 'ctdb reloadips' on the node.
+.PP
+The file will then be reloaded on the node and addresses will be added or removed as required to match the newly loaded file. When updating a single node it may take a little while before any newly added addresses are failed onto the node.
+.PP
+.PP
+Procedure to update the public address configuration on whole cluster:
+.PP
+1, Update the /etc/ctdb/public_addresses file on all nodes
+.PP
+2, Run 'ctdb reloadips \-n all'.
+.PP
+This command will then force all nodes to reload and update the addresses. This process is controlled and synchronized by the recovery master to ensure that all addresses are added to all nodes as one single operation, after which any required ip node rebalancing may may take place.
.SS "tickle <srcip:port> <dstip:port>"
.PP
This command will will send a TCP tickle to the source host for the specified TCP connection. A TCP tickle is a TCP ACK packet with an invalid sequence and acknowledge number and will when received by the source host result in it sending an immediate correct ACK back to the other end.
diff --git a/doc/ctdb.1.html b/doc/ctdb.1.html
index a6da3fb..2b81389 100644
--- a/doc/ctdb.1.html
+++ b/doc/ctdb.1.html
@@ -1,6 +1,6 @@
-<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>ctdb</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="ctdb.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ctdb — clustered tdb database management utility</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">ctdb [ OPTIONS ] COMMAND ...</code> </p></div><div class="cmdsynopsis"><p><code class="command">ctdb</code> [-n <node>] [-Y] [-t <timeout>] [-T <timelimit>] [-? --help] [--usage] [-d --debug=<INTEGER>] [--socket=<filename>] [--print-emptyrecords] [--print-datasize] [--print-lmaster] [--print-hash] [--print-recordflags]</p></div></div><div class="refsect1" lang="en"><a name="id4550272"></a><h2>DESCRIPTION</h2><p>
+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>ctdb</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="ctdb.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ctdb — clustered tdb database management utility</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">ctdb [ OPTIONS ] COMMAND ...</code> </p></div><div class="cmdsynopsis"><p><code class="command">ctdb</code> [-n <node>] [-Y] [-t <timeout>] [-T <timelimit>] [-? --help] [--usage] [-d --debug=<INTEGER>] [--socket=<filename>] [--print-emptyrecords] [--print-datasize] [--print-lmaster] [--print-hash] [--print-recordflags]</p></div></div><div class="refsect1" lang="en"><a name="id1890944"></a><h2>DESCRIPTION</h2><p>
ctdb is a utility to view and manage a ctdb cluster.
- </p></div><div class="refsect1" lang="en"><a name="id4550281"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">-n <pnn></span></dt><dd><p>
+ </p></div><div class="refsect1" lang="en"><a name="id1890953"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">-n <pnn></span></dt><dd><p>
This specifies the physical node number on which to execute the
command. Default is to run the command on the daemon running on
the local host.
@@ -46,13 +46,13 @@
This lets catdb and dumpdbbackup print the
record flags for each record. Note that cattdb always
prints the flags.
- </p></dd></dl></div></div><div class="refsect1" lang="en"><a name="id4550470"></a><h2>Administrative Commands</h2><p>
+ </p></dd></dl></div></div><div class="refsect1" lang="en"><a name="id1891142"></a><h2>Administrative Commands</h2><p>
These are commands used to monitor and administrate a CTDB cluster.
- </p><div class="refsect2" lang="en"><a name="id4550478"></a><h3>pnn</h3><p>
+ </p><div class="refsect2" lang="en"><a name="id1891150"></a><h3>pnn</h3><p>
This command displays the pnn of the current node.
- </p></div><div class="refsect2" lang="en"><a name="id4550488"></a><h3>status</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891160"></a><h3>status</h3><p>
This command shows the current status of the ctdb node.
- </p><div class="refsect3" lang="en"><a name="id4550496"></a><h4>node status</h4><p>
+ </p><div class="refsect3" lang="en"><a name="id1891168"></a><h4>node status</h4><p>
Node status reflects the current status of the node. There are five possible states:
</p><p>
OK - This node is fully functional.
@@ -75,7 +75,7 @@
in a cluster like a node that is ok. Some interfaces to serve
public ip addresses are down, but at least one interface is up.
See also "ctdb ifaces".
- </p></div><div class="refsect3" lang="en"><a name="id4550545"></a><h4>generation</h4><p>
+ </p></div><div class="refsect3" lang="en"><a name="id1891217"></a><h4>generation</h4><p>
The generation id is a number that indicates the current generation
of a cluster instance. Each time a cluster goes through a
reconfiguration or a recovery its generation id will be changed.
@@ -96,10 +96,10 @@
All nodes start with generation "INVALID" and are not assigned a real
generation id until they have successfully been merged with a cluster
through a recovery.
- </p></div><div class="refsect3" lang="en"><a name="id4550570"></a><h4>VNNMAP</h4><p>
+ </p></div><div class="refsect3" lang="en"><a name="id1891242"></a><h4>VNNMAP</h4><p>
The list of Virtual Node Numbers. This is a list of all nodes that actively participates in the cluster and that share the workload of hosting the Clustered TDB database records.
Only nodes that are participating in the vnnmap can become lmaster or dmaster for a database record.
- </p></div><div class="refsect3" lang="en"><a name="id4550581"></a><h4>Recovery mode</h4><p>
+ </p></div><div class="refsect3" lang="en"><a name="id1891253"></a><h4>Recovery mode</h4><p>
This is the current recovery mode of the cluster. There are two possible modes:
</p><p>
NORMAL - The cluster is fully operational.
@@ -119,7 +119,7 @@
have been recovered, the node mode will change into NORMAL mode
and the databases will be "thawed", allowing samba to access the
databases again.
- </p></div><div class="refsect3" lang="en"><a name="id4550613"></a><h4>Recovery master</h4><p>
+ </p></div><div class="refsect3" lang="en"><a name="id1891285"></a><h4>Recovery master</h4><p>
This is the cluster node that is currently designated as the recovery master. This node is responsible of monitoring the consistency of the cluster and to perform the actual recovery process when reqired.
</p><p>
Only one node at a time can be the designated recovery master. Which
@@ -141,9 +141,9 @@ hash:2 lmaster:2
hash:3 lmaster:3
Recovery mode:NORMAL (0)
Recovery master:0
- </pre></div><div class="refsect2" lang="en"><a name="id4550644"></a><h3>recmaster</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891316"></a><h3>recmaster</h3><p>
This command shows the pnn of the node which is currently the recmaster.
- </p></div><div class="refsect2" lang="en"><a name="id4550653"></a><h3>uptime</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891325"></a><h3>uptime</h3><p>
This command shows the uptime for the ctdb daemon. When the last recovery or ip-failover completed and how long it took. If the "duration" is shown as a negative number, this indicates that there is a recovery/failover in progress and it started that many seconds ago.
</p><p>
Example: ctdb uptime
@@ -152,7 +152,7 @@ Current time of node : Thu Oct 29 10:38:54 2009
Ctdbd start time : (000 16:54:28) Wed Oct 28 17:44:26 2009
Time of last recovery/failover: (000 16:53:31) Wed Oct 28 17:45:23 2009
Duration of last recovery/failover: 2.248552 seconds
- </pre></div><div class="refsect2" lang="en"><a name="id4550678"></a><h3>listnodes</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891350"></a><h3>listnodes</h3><p>
This command shows lists the ip addresses of all the nodes in the cluster.
</p><p>
Example: ctdb listnodes
@@ -161,7 +161,7 @@ Duration of last recovery/failover: 2.248552 seconds
10.0.0.72
10.0.0.73
10.0.0.74
- </pre></div><div class="refsect2" lang="en"><a name="id4550699"></a><h3>ping</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891371"></a><h3>ping</h3><p>
This command will "ping" all CTDB daemons in the cluster to verify that they are processing commands correctly.
</p><p>
Example: ctdb ping
@@ -172,7 +172,7 @@ response from 0 time=0.000054 sec (3 clients)
response from 1 time=0.000144 sec (2 clients)
response from 2 time=0.000105 sec (2 clients)
response from 3 time=0.000114 sec (2 clients)
- </pre></div><div class="refsect2" lang="en"><a name="id4550722"></a><h3>ifaces</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891394"></a><h3>ifaces</h3><p>
This command will display the list of network interfaces, which could
host public addresses, along with their status.
</p><p>
@@ -195,13 +195,13 @@ name:eth2 link:up references:1
:eth4:0:0
:eth3:1:1
:eth2:1:1
- </pre></div><div class="refsect2" lang="en"><a name="id4550758"></a><h3>setifacelink <iface> <status></h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891430"></a><h3>setifacelink <iface> <status></h3><p>
This command will set the status of a network interface.
The status needs to be "up" or "down". This is typically
used in the 10.interfaces script in the "monitor" event.
</p><p>
Example: ctdb setifacelink eth0 up
- </p></div><div class="refsect2" lang="en"><a name="id4550772"></a><h3>ip</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891444"></a><h3>ip</h3><p>
This command will display the list of public addresses that are provided by the cluster and which physical node is currently serving this ip. By default this command will ONLY show those public addresses that are known to the node itself. To see the full list of all public ips across the cluster you must use "ctdb ip -n all".
</p><p>
Example: ctdb ip
@@ -231,7 +231,7 @@ Public IPs on node 0
:172.31.92.83:0:eth5:eth5:eth4,eth5:
:172.31.92.84:1::eth5:eth4,eth5:
:172.31.92.85:0:eth5:eth5:eth4,eth5:
- </pre></div><div class="refsect2" lang="en"><a name="id4550820"></a><h3>ipinfo <ip></h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891492"></a><h3>ipinfo <ip></h3><p>
This command will display details about the specified public addresses.
</p><p>
Example: ctdb ipinfo 172.31.92.85
@@ -244,7 +244,7 @@ CurrentNode:0
NumInterfaces:2
Interface[1]: Name:eth4 Link:down References:0
Interface[2]: Name:eth5 Link:up References:2 (active)
- </pre></div><div class="refsect2" lang="en"><a name="id4550843"></a><h3>scriptstatus</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891515"></a><h3>scriptstatus</h3><p>
This command displays which scripts where run in the previous monitoring cycle and the result of each script. If a script failed with an error, causing the node to become unhealthy, the output from that script is also shown.
</p><p>
Example: ctdb scriptstatus
@@ -261,15 +261,15 @@ Interface[2]: Name:eth5 Link:up References:2 (active)
41.httpd Status:OK Duration:0.039 Tue Mar 24 18:56:57 2009
50.samba Status:ERROR Duration:0.082 Tue Mar 24 18:56:57 2009
OUTPUT:ERROR: Samba tcp port 445 is not responding
- </pre></div><div class="refsect2" lang="en"><a name="id4550871"></a><h3>disablescript <script></h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891543"></a><h3>disablescript <script></h3><p>
This command is used to disable an eventscript.
</p><p>
This will take effect the next time the eventscripts are being executed so it can take a short while until this is reflected in 'scriptstatus'.
- </p></div><div class="refsect2" lang="en"><a name="id4550885"></a><h3>enablescript <script></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891557"></a><h3>enablescript <script></h3><p>
This command is used to enable an eventscript.
</p><p>
This will take effect the next time the eventscripts are being executed so it can take a short while until this is reflected in 'scriptstatus'.
- </p></div><div class="refsect2" lang="en"><a name="id4550899"></a><h3>getvar <name></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891571"></a><h3>getvar <name></h3><p>
Get the runtime value of a tuneable variable.
</p><p>
Example: ctdb getvar MaxRedirectCount
@@ -277,11 +277,11 @@ Interface[2]: Name:eth5 Link:up References:2 (active)
Example output:
</p><pre class="screen">
MaxRedirectCount = 3
- </pre></div><div class="refsect2" lang="en"><a name="id4550920"></a><h3>setvar <name> <value></h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891592"></a><h3>setvar <name> <value></h3><p>
Set the runtime value of a tuneable variable.
</p><p>
Example: ctdb setvar MaxRedirectCount 5
- </p></div><div class="refsect2" lang="en"><a name="id4550933"></a><h3>listvars</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891605"></a><h3>listvars</h3><p>
List all tuneable variables, except the values of the obsolete tunables
like VacuumMinInterval. The obsolete tunables can be retrieved only
explicitly with the "ctdb getvar" command.
@@ -334,7 +334,7 @@ StatHistoryInterval = 1
DeferredAttachTO = 120
AllowClientDBAttach = 1
RecoverPDBBySeqNum = 0
- </pre></div><div class="refsect2" lang="en"><a name="id4550966"></a><h3>lvsmaster</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891638"></a><h3>lvsmaster</h3><p>
This command shows which node is currently the LVSMASTER. The
LVSMASTER is the node in the cluster which drives the LVS system and
which receives all incoming traffic from clients.
@@ -345,7 +345,7 @@ RecoverPDBBySeqNum = 0
evenly onto the other nodes in the cluster. This is an alternative to using
public ip addresses. See the manpage for ctdbd for more information
about LVS.
- </p></div><div class="refsect2" lang="en"><a name="id4550983"></a><h3>lvs</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891655"></a><h3>lvs</h3><p>
This command shows which nodes in the cluster are currently active in the
LVS configuration. I.e. which nodes we are currently loadbalancing
the single ip address across.
@@ -360,7 +360,7 @@ RecoverPDBBySeqNum = 0
</p><pre class="screen">
2:10.0.0.13
3:10.0.0.14
- </pre></div><div class="refsect2" lang="en"><a name="id4551008"></a><h3>getcapabilities</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891680"></a><h3>getcapabilities</h3><p>
This command shows the capabilities of the current node.
Please see manpage for ctdbd for a full list of all capabilities and
more detailed description.
@@ -379,7 +379,7 @@ RecoverPDBBySeqNum = 0
RECMASTER: YES
LMASTER: YES
LVS: NO
- </pre></div><div class="refsect2" lang="en"><a name="id4551038"></a><h3>statistics</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891710"></a><h3>statistics</h3><p>
Collect statistics from the CTDB daemon about how many calls it has served.
</p><p>
Example: ctdb statistics
@@ -421,23 +421,23 @@ CTDB version 1
max_hop_count 0
max_call_latency 4.948321 sec
max_lockwait_latency 0.000000 sec
- </pre></div><div class="refsect2" lang="en"><a name="id4551069"></a><h3>statisticsreset</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891741"></a><h3>statisticsreset</h3><p>
This command is used to clear all statistics counters in a node.
</p><p>
Example: ctdb statisticsreset
- </p></div><div class="refsect2" lang="en"><a name="id4551082"></a><h3>getreclock</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891754"></a><h3>getreclock</h3><p>
This command is used to show the filename of the reclock file that is used.
</p><p>
Example output:
</p><pre class="screen">
Reclock file:/gpfs/.ctdb/shared
- </pre></div><div class="refsect2" lang="en"><a name="id4551100"></a><h3>setreclock [filename]</h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1891772"></a><h3>setreclock [filename]</h3><p>
This command is used to modify, or clear, the file that is used as the reclock file at runtime. When this command is used, the reclock file checks are disabled. To re-enable the checks the administrator needs to activate the "VerifyRecoveryLock" tunable using "ctdb setvar".
</p><p>
If run with no parameter this will remove the reclock file completely. If run with a parameter the parameter specifies the new filename to use for the recovery lock.
</p><p>
This command only affects the runtime settings of a ctdb node and will be lost when ctdb is restarted. For persistent changes to the reclock file setting you must edit /etc/sysconfig/ctdb.
- </p></div><div class="refsect2" lang="en"><a name="id4551120"></a><h3>getdebug</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891792"></a><h3>getdebug</h3><p>
Get the current debug level for the node. the debug level controls what information is written to the log file.
</p><p>
The debug levels are mapped to the corresponding syslog levels.
@@ -447,42 +447,42 @@ Reclock file:/gpfs/.ctdb/shared
The list of debug levels from highest to lowest are :
</p><p>
EMERG ALERT CRIT ERR WARNING NOTICE INFO DEBUG
- </p></div><div class="refsect2" lang="en"><a name="id4551142"></a><h3>setdebug <debuglevel></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891814"></a><h3>setdebug <debuglevel></h3><p>
Set the debug level of a node. This controls what information will be logged.
</p><p>
The debuglevel is one of EMERG ALERT CRIT ERR WARNING NOTICE INFO DEBUG
- </p></div><div class="refsect2" lang="en"><a name="id4551156"></a><h3>getpid</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891828"></a><h3>getpid</h3><p>
This command will return the process id of the ctdb daemon.
- </p></div><div class="refsect2" lang="en"><a name="id4551165"></a><h3>disable</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891837"></a><h3>disable</h3><p>
This command is used to administratively disable a node in the cluster.
A disabled node will still participate in the cluster and host
clustered TDB records but its public ip address has been taken over by
a different node and it no longer hosts any services.
- </p></div><div class="refsect2" lang="en"><a name="id4551176"></a><h3>enable</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891848"></a><h3>enable</h3><p>
Re-enable a node that has been administratively disabled.
- </p></div><div class="refsect2" lang="en"><a name="id4551186"></a><h3>stop</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891858"></a><h3>stop</h3><p>
This command is used to administratively STOP a node in the cluster.
A STOPPED node is connected to the cluster but will not host any
public ip addresse, nor does it participate in the VNNMAP.
The difference between a DISABLED node and a STOPPED node is that
a STOPPED node does not host any parts of the database which means
that a recovery is required to stop/continue nodes.
- </p></div><div class="refsect2" lang="en"><a name="id4551198"></a><h3>continue</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891870"></a><h3>continue</h3><p>
Re-start a node that has been administratively stopped.
- </p></div><div class="refsect2" lang="en"><a name="id4551207"></a><h3>addip <public_ip/mask> <iface></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891879"></a><h3>addip <public_ip/mask> <iface></h3><p>
This command is used to add a new public ip to a node during runtime.
This allows public addresses to be added to a cluster without having
to restart the ctdb daemons.
</p><p>
Note that this only updates the runtime instance of ctdb. Any changes will be lost next time ctdb is restarted and the public addresses file is re-read.
If you want this change to be permanent you must also update the public addresses file manually.
- </p></div><div class="refsect2" lang="en"><a name="id4551223"></a><h3>delip <public_ip></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891895"></a><h3>delip <public_ip></h3><p>
This command is used to remove a public ip from a node during runtime.
If this public ip is currently hosted by the node it being removed from, the ip will first be failed over to another node, if possible, before it is removed.
</p><p>
Note that this only updates the runtime instance of ctdb. Any changes will be lost next time ctdb is restarted and the public addresses file is re-read.
If you want this change to be permanent you must also update the public addresses file manually.
- </p></div><div class="refsect2" lang="en"><a name="id4551240"></a><h3>moveip <public_ip> <node></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891912"></a><h3>moveip <public_ip> <node></h3><p>
This command can be used to manually fail a public ip address to a
specific node.
</p><p>
@@ -493,14 +493,14 @@ Reclock file:/gpfs/.ctdb/shared
DeterministicIPs = 0
</p><p>
NoIPFailback = 1
- </p></div><div class="refsect2" lang="en"><a name="id4551261"></a><h3>shutdown</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891933"></a><h3>shutdown</h3><p>
This command will shutdown a specific CTDB daemon.
- </p></div><div class="refsect2" lang="en"><a name="id4551270"></a><h3>recover</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891942"></a><h3>recover</h3><p>
This command will trigger the recovery daemon to do a cluster
recovery.
- </p></div><div class="refsect2" lang="en"><a name="id4551280"></a><h3>ipreallocate</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891952"></a><h3>ipreallocate</h3><p>
This command will force the recovery master to perform a full ip reallocation process and redistribute all ip addresses. This is useful to "reset" the allocations back to its default state if they have been changed using the "moveip" command. While a "recover" will also perform this reallocation, a recovery is much more hevyweight since it will also rebuild all the databases.
- </p></div><div class="refsect2" lang="en"><a name="id4551292"></a><h3>setlmasterrole <on|off></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891964"></a><h3>setlmasterrole <on|off></h3><p>
This command is used ot enable/disable the LMASTER capability for a node at runtime. This capability determines whether or not a node can be used as an LMASTER for records in the database. A node that does not have the LMASTER capability will not show up in the vnnmap.
</p><p>
Nodes will by default have this capability, but it can be stripped off nodes by the setting in the sysconfig file or by using this command.
@@ -508,21 +508,21 @@ Reclock file:/gpfs/.ctdb/shared
Once this setting has been enabled/disabled, you need to perform a recovery for it to take effect.
</p><p>
See also "ctdb getcapabilities"
- </p></div><div class="refsect2" lang="en"><a name="id4551315"></a><h3>setrecmasterrole <on|off></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1891987"></a><h3>setrecmasterrole <on|off></h3><p>
This command is used ot enable/disable the RECMASTER capability for a node at runtime. This capability determines whether or not a node can be used as an RECMASTER for the cluster. A node that does not have the RECMASTER capability can not win a recmaster election. A node that already is the recmaster for the cluster when the capability is stripped off the node will remain the recmaster until the next cluster election.
</p><p>
Nodes will by default have this capability, but it can be stripped off nodes by the setting in the sysconfig file or by using this command.
</p><p>
See also "ctdb getcapabilities"
- </p></div><div class="refsect2" lang="en"><a name="id4551336"></a><h3>killtcp <srcip:port> <dstip:port></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892008"></a><h3>killtcp <srcip:port> <dstip:port></h3><p>
This command will kill the specified TCP connection by issuing a
TCP RST to the srcip:port endpoint. This is a command used by the
ctdb eventscripts.
- </p></div><div class="refsect2" lang="en"><a name="id4551346"></a><h3>gratiousarp <ip> <interface></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892018"></a><h3>gratiousarp <ip> <interface></h3><p>
This command will send out a gratious arp for the specified interface
through the specified interface. This command is mainly used by the
ctdb eventscripts.
- </p></div><div class="refsect2" lang="en"><a name="id4551357"></a><h3>reloadnodes</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892029"></a><h3>reloadnodes</h3><p>
This command is used when adding new nodes, or removing existing nodes from an existing cluster.
</p><p>
Procedure to add a node:
@@ -556,7 +556,34 @@ Reclock file:/gpfs/.ctdb/shared
</p><p>
5, Use 'ctdb status' on all nodes and verify that the deleted node no longer shows up in the list..
</p><p>
- </p></div><div class="refsect2" lang="en"><a name="id4551426"></a><h3>tickle <srcip:port> <dstip:port></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892098"></a><h3>reloadips</h3><p>
+ This command is used to reload the public addresses file and update the
+ ip configuration of the running daemon.
+ </p><p>
+ Procedure to update the public address configuration on a single node:
+ </p><p>
+ 1, Update the /etc/ctdb/public_addresses file on the node
+ </p><p>
+ 2, Run 'ctdb reloadips' on the node.
+ </p><p>
+ The file will then be reloaded on the node and addresses will be added
+ or removed as required to match the newly loaded file. When updating
+ a single node it may take a little while before any newly added
+ addresses are failed onto the node.
+ </p><p>
+ </p><p>
+ Procedure to update the public address configuration on whole cluster:
+ </p><p>
+ 1, Update the /etc/ctdb/public_addresses file on all nodes
+ </p><p>
+ 2, Run 'ctdb reloadips -n all'.
+ </p><p>
+ This command will then force all nodes to reload and update the
+ addresses. This process is controlled and synchronized by the recovery
+ master to ensure that all addresses are added to all nodes as one
+ single operation, after which any required ip node rebalancing may
+ may take place.
+ </p></div><div class="refsect2" lang="en"><a name="id1892146"></a><h3>tickle <srcip:port> <dstip:port></h3><p>
This command will will send a TCP tickle to the source host for the
specified TCP connection.
A TCP tickle is a TCP ACK packet with an invalid sequence and
@@ -568,10 +595,10 @@ Reclock file:/gpfs/.ctdb/shared
TCP connection has been disrupted and that the client will need
to reestablish. This greatly speeds up the time it takes for a client
to detect and reestablish after an IP failover in the ctdb cluster.
- </p></div><div class="refsect2" lang="en"><a name="id4551448"></a><h3>gettickles <ip></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892164"></a><h3>gettickles <ip></h3><p>
This command is used to show which TCP connections are registered with
CTDB to be "tickled" if there is a failover.
- </p></div><div class="refsect2" lang="en"><a name="id4551457"></a><h3>repack [max_freelist]</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892174"></a><h3>repack [max_freelist]</h3><p>
Over time, when records are created and deleted in a TDB, the TDB list of free space will become fragmented. This can lead to a slowdown in accessing TDB records.
This command is used to defragment a TDB database and pruning the freelist.
</p><p>
@@ -586,7 +613,7 @@ Reclock file:/gpfs/.ctdb/shared
Example: ctdb repack 1000
</p><p>
By default, this operation is issued from the 00.ctdb event script every 5 minutes.
- </p></div><div class="refsect2" lang="en"><a name="id4551495"></a><h3>vacuum [max_records]</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892211"></a><h3>vacuum [max_records]</h3><p>
Over time CTDB databases will fill up with empty deleted records which will lead to a progressive slow down of CTDB database access.
This command is used to prune all databases and delete all empty records from the cluster.
</p><p>
@@ -602,17 +629,17 @@ Reclock file:/gpfs/.ctdb/shared
Example: ctdb vacuum
</p><p>
By default, this operation is issued from the 00.ctdb event script every 5 minutes.
- </p></div><div class="refsect2" lang="en"><a name="id4551524"></a><h3>backupdb <dbname> <file></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892240"></a><h3>backupdb <dbname> <file></h3><p>
This command can be used to copy the entire content of a database out to a file. This file can later be read back into ctdb using the restoredb command.
This is mainly useful for backing up persistent databases such as secrets.tdb and similar.
- </p></div><div class="refsect2" lang="en"><a name="id4551535"></a><h3>restoredb <file> [<dbname>]</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892251"></a><h3>restoredb <file> [<dbname>]</h3><p>
This command restores a persistent database that was previously backed up using backupdb.
By default the data will be restored back into the same database as
it was created from. By specifying dbname you can restore the data
into a different database.
- </p></div><div class="refsect2" lang="en"><a name="id4551546"></a><h3>wipedb <dbname></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892263"></a><h3>wipedb <dbname></h3><p>
This command can be used to remove all content of a database.
- </p></div></div><div class="refsect2" lang="en"><a name="id4551557"></a><h3>getlog <level></h3><p>
+ </p></div></div><div class="refsect2" lang="en"><a name="id1892273"></a><h3>getlog <level></h3><p>
In addition to the normal loggign to a log file,
CTDBD also keeps a in-memory ringbuffer containing the most recent
log entries for all log levels (except DEBUG).
@@ -625,21 +652,21 @@ This is mainly useful for backing up persistent databases such as secrets.tdb an
</p><p>
This command extracts all messages of level or lower log level from
memory and prints it to the screen.
- </p></div><div class="refsect2" lang="en"><a name="id4551575"></a><h3>clearlog</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892292"></a><h3>clearlog</h3><p>
This command clears the in-memory logging ringbuffer.
- </p></div><div class="refsect2" lang="en"><a name="id4551584"></a><h3>setdbreadonly <dbname|hash></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892301"></a><h3>setdbreadonly <dbname|hash></h3><p>
This command will enable the ReadOnly record support for a database.
This is an experimental feature to improve performance for contended
records primarily in locking.tdb and brlock.tdb.
When enabling this feature you must set it on all nodes in the cluster.
For now, this feature requires a special patch to samba in order to
use it.
- </p></div><div class="refsect1" lang="en"><a name="id4551596"></a><h2>Debugging Commands</h2><p>
+ </p></div><div class="refsect1" lang="en"><a name="id1892312"></a><h2>Debugging Commands</h2><p>
These commands are primarily used for CTDB development and testing and
should not be used for normal administration.
- </p><div class="refsect2" lang="en"><a name="id4551605"></a><h3>process-exists <pid></h3><p>
+ </p><div class="refsect2" lang="en"><a name="id1892321"></a><h3>process-exists <pid></h3><p>
This command checks if a specific process exists on the CTDB host. This is mainly used by Samba to check if remote instances of samba are still running or not.
- </p></div><div class="refsect2" lang="en"><a name="id4551615"></a><h3>getdbmap</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892331"></a><h3>getdbmap</h3><p>
This command lists all clustered TDB databases that the CTDB daemon has attached to. Some databases are flagged as PERSISTENT, this means that the database stores data persistently and the data will remain across reboots. One example of such a database is secrets.tdb where information about how the cluster was joined to the domain is stored.
</p><p>
If a PERSISTENT database is not in a healthy state the database is
@@ -679,7 +706,7 @@ dbid:0xb775fff6 name:secrets.tdb path:/var/ctdb/persistent/secrets.tdb.0 PERSIST
</p><pre class="screen">
:ID:Name:Path:Persistent:Unhealthy:
:0x7bbbd26c:passdb.tdb:/var/ctdb/persistent/passdb.tdb.0:1:0:
- </pre></div><div class="refsect2" lang="en"><a name="id4551681"></a><h3>getdbstatus <dbname></h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1892398"></a><h3>getdbstatus <dbname></h3><p>
This command displays more details about a database.
</p><p>
Example: ctdb getdbstatus test.tdb.0
@@ -701,35 +728,35 @@ name: registry.tdb
path: /var/ctdb/persistent/registry.tdb.0
PERSISTENT: yes
HEALTH: NO-HEALTHY-NODES - ERROR - Backup of corrupted TDB in '/var/ctdb/persistent/registry.tdb.0.corrupted.20091208091949.0Z'
- </pre></div><div class="refsect2" lang="en"><a name="id4551720"></a><h3>catdb <dbname></h3><p>
+ </pre></div><div class="refsect2" lang="en"><a name="id1892436"></a><h3>catdb <dbname></h3><p>
This command will dump a clustered TDB database to the screen. This is a debugging command.
- </p></div><div class="refsect2" lang="en"><a name="id4551730"></a><h3>cattdb <dbname></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892446"></a><h3>cattdb <dbname></h3><p>
This command will dump the content of the local TDB database to the screen. This is a debugging command.
- </p></div><div class="refsect2" lang="en"><a name="id4551740"></a><h3>dumpdbbackup <backup-file></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id1892456"></a><h3>dumpdbbackup <backup-file></h3><p>
This command will dump the content of database backup to the screen
(similar to ctdb catdb). This is a debugging command.
- </p></div><div class="refsect2" lang="en"><a name="id4551750"></a><h3>getmonmode</h3><p>
--
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