Linux System Administration Recipes A Problem-Solution Approach

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CHAPTER 2 ■ CENTRALIZING YOUR NETWORK: KERBEROS, LDAP, AND NFSYou shouldn’t need to restart the master server (the provider). Just start the slave server up, and itshould automatically pick up the master server database.For this setup to work, you need to be able to have a Kerberos ticket for both ldapadm and rep_admalive at the same time (see the alternative configuration later in this recipe if you’re not using Kerberos).Otherwise, you’d set up your authentication as rep_adm on the master machine, and that would workgreat until you authenticated as ldapadm to make a change to the DB, at which point it would fail. This isparticularly not great given that it’s precisely when you’re making changes that you want replicationto work!■ Note If you do have this problem, you’ll see this in the .rej file in /var/lib/ldap/:ERROR: ReferralIf you increase the logging of the slave, you’ll also see slurpd changing users.What you need is to set up k5start to manage more than one ticket. Set up your slapd init script(which also starts slurpd and k5start) to include this:KRB5CCNAME="FILE:/tmp/ldap_replicator.tkt"export KRB5CCNAME.....start_slurpd() {if [ "$SLURPD_START" != yes ]; thenreturn 0fiecho -n " slurpd"reason="`start-stop-daemon --start --quiet --oknodo \--exec /usr/sbin/slurpd -- $SLURPD_OPTIONS 2>&1`"echo -n " k5start"# Start kstart in order to manage replicationreason_kstart="`start-stop-daemon --start --pidfile \/var/run/k5start.pid \--exec /usr/bin/k5start -- -b -K 10 \-k /tmp/ldap_replicator.tkt \-p /var/run/k5start.pid \-f /etc/ldap/slurpd.keytab rep_adm`"}reason and reason_kstart are caught separately elsewhere in the script so that a failure ofkstart won’t cause the total failure of the LDAP server. To do this, add this section to the start ofreport_failure:44Download at WoweBook.Com
CHAPTER 2 ■ CENTRALIZING YOUR NETWORK: KERBEROS, LDAP, AND NFSreport_failure() {if [ -n "$reason" ]; thenecho " - failed: "echo "$reason"elseif [ -n "$reason_kstart" ]; thenecho " kstart failed: "echo "$reason_kstart"echo " - failed."elsecat
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Contents■About the Author .......
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■ CONTENTS3-7. Writing a Nagios P
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■ CONTENTS■Chapter 8: Using the
Page 13 and 14: ■ CONTENTSAbout the Author■Juli
Page 15 and 16: ■ CONTENTSAcknowledgmentsMany tha
Page 17 and 18: ■ CONTENTSIntroductionThis book i
Page 19 and 20: ■ INTRODUCTIONDownloading the Cod
Page 21 and 22: C H A P T E R 1■ ■ ■Saving Yo
Page 23 and 24: CHAPTER 1 ■ SAVING YOURSELF EFFOR
Page 41 and 42: C H A P T E R 2■ ■ ■Centraliz
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Page 83 and 84: C H A P T E R 3■ ■ ■Monitorin
Page 85 and 86: CHAPTER 3 ■ MONITORING AND UPDATI
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C H A P T E R 4■ ■ ■Taking Ba
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CHAPTER 4 ■ TAKING BACKUPS AND MA
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C H A P T E R 5■ ■ ■Working w
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CHAPTER 5 ■ WORKING WITH FILESYST
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C H A P T E R 6■ ■ ■Securing
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CHAPTER 6 ■ SECURING YOUR SYSTEMS
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CHAPTER 7 ■ WORKING WITH APACHEOn
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CHAPTER 7 ■ WORKING WITH APACHEdi
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CHAPTER 7 ■ WORKING WITH APACHE4.
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CHAPTER 7 ■ WORKING WITH APACHE
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CHAPTER 7 ■ WORKING WITH APACHEAl
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CHAPTER 7 ■ WORKING WITH APACHE
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C H A P T E R 8■ ■ ■Making Be
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CHAPTER 8 ■ USING THE COMMAND LIN
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CHAPTER 9 ■ WORKING WITH TEXT IN
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C H A P T E R 10■ ■ ■Things G
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CHAPTER 10 ■ THINGS GO IN, THINGS
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C H A P T E R 11■ ■ ■Tracking
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CHAPTER 11 ■ TRACKING DOWN BUGSTh
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CHAPTER 11 ■ TRACKING DOWN BUGS01
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CHAPTER 11 ■ TRACKING DOWN BUGS
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CHAPTER 11 ■ TRACKING DOWN BUGSTh
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CHAPTER 11 ■ TRACKING DOWN BUGSAn
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CHAPTER 11 ■ TRACKING DOWN BUGS#
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C H A P T E R 12■ ■ ■Managing
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CHAPTER 12 ■ MANAGING TIME AND PE
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APPENDIX■ ■ ■Perl TipsSee rec
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APPENDIX ■ PERL TIPS• Date::Par
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APPENDIX ■ PERL TIPSPerl Syntax N
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■ ■ ■Index■Symbols$CDPATH,
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■ INDEXenscript option (printing)
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■ INDEX■NNagiosadding hosts to,
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■ INDEXsyslogcentralized logging
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Linux System Administration Recipes A Problem-Solution Approach

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