# This document is a how-to for installing a Fedora scripts.mit.edu server. # It is semi-vaguely in the form of a shell script, but is not really # runnable as it stands. # Notation # [PRODUCTION] Production server that will be put into the pool # [WIZARD] Semi-production server that will only have # daemon.scripts-security-upd bits, among other # restricted permissions # [TESTSERVER] Completely untrusted server # 'branch' is the current svn branch you are on. You want to # use trunk if your just installing a new server, and branches/fcXX-dev # if your preparing a server on a new Fedora release. branch="trunk" # 'server' is the public hostname of your server, for SCP'ing files # to and from. server=YOUR-SERVER-NAME-HERE # ----------------------------->8-------------------------------------- # FIRST TIME INSTRUCTIONS # # [PRODUCTION] If this is the first time you've installed this hostname, # you will need to update a bunch of files to add support for it. These # include: # o Adding all aliases to /etc/httpd/conf.d/scripts-vhost-names.conf # (usually this is hostname, hostname.mit.edu, h-n, h-n.mit.edu, # scriptsN, scriptsN.mit.edu, and the IP address.) # o Adding routing rules for the static IP in # /etc/sysconfig/network-scripts/route-eth1 # o Adding the IP address to the hosts file (same hosts as for # scripts-vhost-names) # o Update SSH config at # - server/fedora/config/etc/ssh/shosts.equiv # - server/fedora/config/etc/ssh/ssh_known_hosts # - server/fedora/config/etc/ssh/sshd_config : DenyUsers # (the last part is critical to ensure that rooting one server # doesn't give you root to all the other servers) # o Put the hostname information in LDAP so SVN and Git work # o Set up Nagios monitoring on sipb-noc for the host # o Set up the host as in the pool on r-b/r-b /etc/heartbeat/ldirectord.cf # o Update locker/etc/known_hosts # o Update website files: # /mit/scripts/web_scripts/home/server.css.cgi # /mit/scripts/web_scripts/heartbeat/heartbeat.php # # You will also need to prepare the keytabs for credit-card. In particular, # use ktutil to combine the host/scripts.mit.edu and # host/scripts-vhosts.mit.edu keys with host/this-server.mit.edu in # the keytab. Do not use 'k5srvutil change' on the combined keytab # or you'll break the other servers. (real servers only). Be # careful about writing out the keytab: if you write it to an # existing file the keys will just get appended. The correct # credential list should look like: # ktutil: l # slot KVNO Principal # ---- ---- --------------------------------------------------------------------- # 1 5 host/old-faithful.mit.edu@ATHENA.MIT.EDU # 2 3 host/scripts-vhosts.mit.edu@ATHENA.MIT.EDU # 3 2 host/scripts.mit.edu@ATHENA.MIT.EDU # 4 8 host/scripts-test.mit.edu@ATHENA.MIT.EDU # # The LDAP keytab should be by itself, so be sure to delete it and # put it in its own file. # ----------------------------->8-------------------------------------- # INFINITE INSTALLATION # Start with a Scripts kickstarted install of Fedora (install-fedora) # IMPORTANT: If you are installing a server without the benefit of # Kickstart (for example, you are installing on XVM, it is VITALLY # IMPORTANT that you go through the kickstart and apply all of the # necessary changes--for example, disabling selinux or enabling # network.) # XXX We should make Kickstart work for test servers too # Make sure selinux is disabled selinuxenabled || echo "selinux not enabled" # Take updates, reboot if there's a kernel update. yum update -y # Get rid of network manager (XXX figure out to make kickstarter do # this for us) yum remove NetworkManager # Make sure sendmail isn't installed, replace it with postfix yum shell -y < packages.txt # arrange for packages.txt to be passed to the server, then run: cd /tmp yumdownloader --disablerepo=scripts ghc-cgi ghc-cgi-devel yum localinstall ghc-cgi*.x86_64.rpm yum install -y $(cat packages.txt) # The reason this works is that ghc-cgi is marked as installonlypkgs # in yum.conf, telling yum to install them side-by-side rather than # updating them. If it doesn't work, use --skip-broken on the yum # command line. # Check which packages are installed on your new server that are not # in the snapshot, and remove ones that aren't needed for some reason # on the new machine. Otherwise, aside from bloat, you may end up # with undesirable things for security, like sendmail. rpm -qa --queryformat "%{Name}.%{Arch}\n" | grep -v kernel | sort > newpackages.txt diff -u packages.txt newpackages.txt | grep -v kernel | less # here's a cute script that removes all extra packages yum erase -y $(grep -Fxvf packages.txt newpackages.txt) # 20101208 - Mysteriously we manage to get these extra packages # from kickstart: mcelog mobile-broadband-provider-info # ModemManager PackageKit # ----------------------------->8-------------------------------------- # INFINITE CONFIGURATION # [PROD] Create fedora-ds user (needed for credit-card) # [TEST] too if you want to run a local dirsrv instance useradd -r -d /var/lib/dirsrv fedora-ds # Run credit-card to clone in credentials and make things runabble # NOTE: You may be tempted to run credit-card earlier in the install # process in order, for example, to be able to SSH in to the servers # with Kerberos. However, it is better to install the credentials # *after* we have run a boatload untrusted code as part of the # spheroids objects process. So don't move this step earlier! python host.py push $server # This is superseded by credit-card, which works for [PRODUCTION] and # [WIZARD]. We don't have an easy way of running credit-card for XVM... #b # # # All types of servers will have an /etc/daemon.keytab file, however, # # different types of server will have different credentials in this # # keytab. # # [PRODUCTION] daemon.scripts # # [WIZARD] daemon.scripts-security-upd # # [TESTSERVER] daemon.scripts-test # Test that zephyr is working systemctl enable zhm.service systemctl start zhm.service echo 'Test!' | zwrite -d -c scripts -i test # Check out the scripts /usr/vice/etc configuration cd /root/vice \cp -a etc /usr/vice # [TESTSERVER] If you're installing a test server, this needs to be # much smaller; the max filesize on XVM is 10GB. Pick something like # 500000. Also, some of the AFS parameters are kind of silly (and if # you're low on disk space, will actually exhaust our inodes). Edit # these parameters in /etc/sysconfig/openafs (I just chopped a zero # off of all of our parameters) echo "/afs:/usr/vice/cache:500000" > /usr/vice/etc/cacheinfo vim /etc/sysconfig/openafs # [PRODUCTION] Set up replication (see ./install-ldap). # You'll need the LDAP keytab for this server: be sure to chown it # fedora-ds after you create the fedora-ds user ls -l /etc/dirsrv/keytab cat install-ldap # Enable lots of services (currently in /etc checkout) systemctl enable openafs-client.service systemctl enable dirsrv.target systemctl enable nslcd.service systemctl enable nscd.service systemctl enable postfix.service systemctl enable nrpe.service # chkconfig'd systemctl enable httpd.service # not for [WIZARD] systemctl start openafs-client.service systemctl start dirsrv.target systemctl start nslcd.service systemctl start nscd.service systemctl start postfix.service systemctl start nrpe.service systemctl start httpd.service # not for [WIZARD] # Note about OpenAFS: Check that fs sysname is correct. You should see, # among others, 'amd64_fedoraX_scripts' (vary X) and 'scripts'. If it's # not, you probably did a distro upgrade and should update # tokensys (server/common/oursrc/tokensys/scripts-afsagent-startup.in) fs sysname # Postfix doesn't actually deliver mail; fix this cd /etc/postfix postmap virtual # Munin might not be monitoring packages that were installed after it munin-node-configure --suggest --shell | sh # Run fmtutil-sys --all, which does something that makes TeX work. # (Note: this errors on XeTeX which is ok.) fmtutil-sys --all # Check for unwanted setuid/setgid binaries find / -xdev -not -perm -o=x -prune -o -type f -perm /ug=s -print | grep -Fxvf /etc/scripts/allowed-setugid.list find / -xdev -not -perm -o=x -prune -o -type f -print0 | xargs -0r /usr/sbin/getcap | cut -d' ' -f1 | grep -Fxvf /etc/scripts/allowed-filecaps.list # You can prune the first set of binaries using 'chmod u-s' and 'chmod g-s' # and remove capabilities using 'setcap -r' # XXX check for selinux gunk # Fix etc by making sure none of our config files got overwritten cd /etc svn status -q # Some usual candidates for clobbering include nsswitch.conf, # resolv.conf and sysconfig/openafs # [WIZARD/TEST] Remember that changes you made should not get # reverted! # Reboot the machine to restore a consistent state, in case you # changed anything. (Note: Starting kdump fails (this is ok)) # ------------------------------->8------------------------------- # ADDENDA AND MISCELLANEOUS THINGS # [OPTIONAL] Your machine's hostname is baked in at install time; # in the rare case you need to change it: it appears to be in: # o /etc/sysconfig/network # o your lvm thingies; probably don't need to edit # [TESTSERVER] Enable password log in vim /etc/ssh/sshd_config service sshd reload vim /etc/pam.d/sshd # Replace the first auth block with: # # If they're not root, but their user exists (success), # auth [success=ignore ignore=ignore default=1] pam_succeed_if.so uid > 0 # # print the "You don't have tickets" error: # auth [success=die ignore=reset default=die] pam_echo.so file=/etc/issue.net.no_tkt # # If !(they are root), # auth [success=1 ignore=ignore default=ignore] pam_succeed_if.so uid eq 0 # # print the "your account doesn't exist" error: # auth [success=die ignore=reset default=die] pam_echo.so file=/etc/issue.net.no_user # [WIZARD/TESTSERVER] If you are setting up a non-production server, # there are some services that it won't provide, and you will need to # make it talk to a real server instead. In particular: # - We don't serve the web, so don't bind scripts.mit.edu # - We don't serve LDAP, so use another server # XXX: Someone should write sed scripts to do this # This involves editing the following files: svn rm /etc/sysconfig/network-scripts/ifcfg-lo:{0,1,2,3} svn rm /etc/sysconfig/network-scripts/route-eth1 # [TESTSERVER] only # o /etc/nslcd.conf # replace: uri ldapi://%2fvar%2frun%2fdirsrv%2fslapd-scripts.socket/ # with: uri ldap://scripts.mit.edu/ # (what happened to nss-ldapd?) # o /etc/openldap/ldap.conf # add: URI ldap://scripts.mit.edu/ # BASE dc=scripts,dc=mit,dc=edu # o /etc/httpd/conf.d/vhost_ldap.conf # replace: VhostLDAPUrl "ldap://127.0.0.1/ou=VirtualHosts,dc=scripts,dc=mit,dc=edu" # with: VhostLDAPUrl "ldap://scripts.mit.edu/ou=VirtualHosts,dc=scripts,dc=mit,dc=edu" # o /etc/postfix/virtual-alias-{domains,maps}-ldap.cf # replace: server_host ldapi://%2fvar%2frun%2fdirsrv%2fslapd-scripts.socket/ # with: server_host = ldap://scripts.mit.edu # to use scripts.mit.edu instead of localhost. # [WIZARD/TESTSERVER] If you are setting up a non-production server, # afsagent's cronjob will attempt to be renewing with the wrong # credentials (daemon.scripts). Change this: vim /home/afsagent/renew # replace all mentions of daemon.scripts.mit.edu # [TESTSERVER] # - You need a self-signed SSL cert or Apache will refuse to start # or do SSL. Generate with: (XXX recommended CN?) openssl req -new -x509 -sha256 -newkey rsa:2048 -keyout /etc/pki/tls/private/scripts.key -out /etc/pki/tls/certs/scripts-cert.pem -nodes -extensions v3_req ln -s /etc/pki/tls/private/scripts.key /etc/pki/tls/private/scripts-2048.key # Also make the various public keys match up openssl rsa -in /etc/pki/tls/private/scripts.key -pubout > /etc/pki/tls/certs/star.scripts.pem openssl rsa -in /etc/pki/tls/private/scripts.key -pubout > /etc/pki/tls/certs/scripts.pem openssl rsa -in /etc/pki/tls/private/scripts.key -pubout > /etc/pki/tls/certs/scripts-cert.pem # Nuke the CSRs since they will all mismatch # XXX alternate strategy replace all the pem's as above cd /etc/httpd/vhosts.d svn rm *.conf # [TESTSERVER] # Remove vhosts.d which we don't have rights for XXX # [TESTSERVER] More stuff for test servers # - Make (/etc/aliases) root mail go to /dev/null, so we don't spam people # - Edit /etc/httpd/conf.d/scripts-vhost-names.conf to have scripts-fX-test.xvm.mit.edu # be an accepted vhost name # - Look at the old test server and see what config changes are floating around