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| − | == The LDAP directory structure ==
| + | This page has moved to [https://wiki.nikhef.nl/nikhef/ctb/NDPF:Creating_Pool_Accounts_With_LDAP the internal CTB Wiki]. |
| − | The list of valid users of the NDPF is kept in a central LDAP directory, currently hosted on <tt>trog.nikhef.nl</tt>. This directory contains both the "local" users as well as all poolaccounts and all automount map entries. The structure of the directory is:
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| − | | |
| − | + dc=farmnet,dc=nikhef,dc=nl
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| − | |
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| − | + ou=Managers
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| − | + ou=LocalGroups (<i>contains all groups!</i>)
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| − | + ou=LocalUsers
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| − | + ou=Poolaccounts
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| − | + ou=automount
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| − | |
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| − | + ou=auto.home
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| − | + ou=lcgprod
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| − | |
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| − | + ou=auto.sedata
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| − | + ou=auto.share
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| − | + ou=auto.stage
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| − | + ou=auto.sedata2
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| − | | |
| − | The <tt>ou=Poolaccounts</tt> entry contains the list of all pool accounts, without any further hierarchy. Each account is named by its <tt>uid</tt>, and is of objectClass "posixAccount". For each account named here, there should be a corresponsing entry in the <tt>ou=pool,ou=auto.home,ou=automount</tt> branch of the tree as well (of objectClass "automount").
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| − | </div>
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| − | | |
| − | == Creating accounts for a new VO ==
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| − | | |
| − | To use the scripts, login on the fileserver "hooimijt.nikhef.nl", and make sure that <tt>/export/perm/adm/bin</tt> is in your path (it contains all the relevant scripts), or go there. Also, make sure you know your LDAP manager password.
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| − | | |
| − | You need to:
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| − | <ol>
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| − | <li>add the accounts to the LDAP directory</li>
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| − | <li>create the homedirectories for these users on hooimijt</li>
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| − | <li>add the inodes to the gridmapdir</li>
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| − | </ol>
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| − | (and of course add the VO itself to the proper Quattor profiles for the selected facilities, but this is outside the scope of this page).
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| − | | |
| − | === Generating the LDIF ===
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| − | | |
| − | Adding users to the directory needs two commands (or one pipe). The <tt>gen_poolacc_ldif</tt> script generates <i>ldif</i> files, that need to be piped in to "ldapadd" to be inserted in the directory.
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| − | | |
| − | Its use is best explained by an example:
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| − | | |
| − | ./gen_poolacc_ldif --vo atlas -g 2002 -b 43000 -n 200
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| − | | |
| − | will spit out lots of ldif, like
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| − | | |
| − | dn: uid=atlas000, ou=PoolAccounts, dc=farmnet,dc=nikhef,dc=nl
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| − | objectclass: top
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| − | objectclass: posixAccount
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| − | cn: PoolAccount 0 of atlas
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| − | uid: atlas000
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| − | uidNumber: 43000
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| − | gidNumber: 2002
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| − | homeDirectory: /home/atlas000
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| − | ...
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| − | | |
| − | this must be added to the directory with <tt>ldapadd</tt>:
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| − | | |
| − | ldapadd -H ldaps://trog.nikhef.nl/ -W -x -D "cn=<i>My Name</i>,ou=managers,dc=farmnet,dc=nikhef,dc=nl"
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| − | | |
| − | Valid managers are "David Groep", "Jeff Templon@nikhef.nl", "Davide Salomoni", "Ronald Starink" and "backup" (the last one can only read, though). The two commands can be combined in a single pipe.
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| − | | |
| − | In due course, the new accounts will appear on the farm, and you can check their presence with the "id" and "ls" commands:
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| − | | |
| − | id -a atlas000
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| − | ls -l /home/atlas000/
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| − | | |
| − | There may be a slight delay if the system you are trying this on is running <tt>nscd</tt>, or is looking at a slave LDAP server (hooimijt or tbn06 instead of trog).
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| − | | |
| − | The number of digits appended to the vo name is three (3) by default, but can be changed with the <tt>-l</tt> option. And, of course, the "voname" specified here is completely unrelated to the VO name in the information system or used in the GlueAccessControlBaseRules.
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| − | | |
| − | ==== Extending an existing poolaccount range ====
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| − | | |
| − | You can also extend an existing range, by specifying a "start" value to <tt>gen_poolacc_ldif</tt>, but remember: the "base" value <b>must remain the same</b>. So, to generate an additional 100 atlas accounts, the command would be
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| − | | |
| − | ./gen_poolacc_ldif --vo atlas -g 2002 -b 43000 -n 300 -s 200
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| − | | |
| − | to start at 200 and ensure that there are 300 accounts in total.
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| − | | |
| − | == Generating the home directories ==
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| − | | |
| − | Once the accounts have been added to the directory, you can create the home directories on hooimijt. This must be done as root, and on hooimijt itself.
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| − | The command to use is <tt>make_poolacc_dir</tt>, which takes one argument: the
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| − | uid prefix to select on. By default, it will generate a shell script that tries to (re)create the homedirectories for <i>all</i> poolaccounts, so beware.
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| − | | |
| − | To generate the home directories for the "phicos" VO, use:
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| − | | |
| − | ./make_poolacc_dir --uid=phicos > /tmp/schapen
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| − | sh /tmp/schapen
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| − | | |
| − | To so the same for the additional 100 atlas accounts created from "atlas200" to
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| − | "atlas299", use:
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| − | | |
| − | ./make_poolacc_dir --uid=atlas2 > /tmp/lam
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| − | sh /tmp/lam
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| − | | |
| − | The current version of <tt>make_poolacc_dir</tt> ensures that the .ssh directory
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| − | contains an empty "authorized_keys" file and is immutable (<tt>"chattr =i .ssh"</tt>).
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| − | | |
| − | == Creating the inodes ==
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| − | | |
| − | Creating the inodes is done with <tt>populate_gridmapdir</tt>. This script is even more trivial than the other two: it extracts all uid's from the <tt>ou=Poolaccounts,dc=farmnet,dc=nikhef,dc=nl</tt> tree and prepends it with "/export/perm/share/gridmapdir":
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| − | | |
| − | ./populate_gridmapdir
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| − | | |
| − | results in
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| − | | |
| − | /export/perm/share/gridmapdir/alice000
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| − | /export/perm/share/gridmapdir/alice001
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| − | /export/perm/share/gridmapdir/alice002
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| − | /export/perm/share/gridmapdir/alice003
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| − | /export/perm/share/gridmapdir/alice004
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| − | ...
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| − | | |
| − | To filter out the new ones, use grep, and pipe the results through xargs so as to touch the files:
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| − | | |
| − | ./populate_gridmapdir | grep atlas2 | xargs touch
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| − | | |
| − | will do the job for the 100 additional atlas accounts, for instance.
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| − | | |
| − | == Repairing an empty gridmapdir ==
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| − | | |
| − | For this you need the backup file that's generated nightly by the <tt>poolmaplog</tt> script from cron. The file format is simple:
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| − | | |
| − | uid subjectDN_in_lowercase
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| − | ...
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| − | | |
| − | btu for use in the gridmapdir the special chars (so painstackingly converted to readable format by poolmaplog) must be concerted back. This is the task of the <tt>repair-pool</tt> script. As far as I know, these are the special characters:
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| − | | |
| − | % / <space> = ( ) - . @
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| − | | |
| − | the repair-pool script will translate these to URL-escaped characters (ie. "=" becomes "%3D" -- note that we must thus convert any %-signs first!)
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| − | | |
| − | The script will automatically relink the poolaccounts to the proper DN for those accounts that were in use (i.e. has a DN assigned to them). You should only attempt repair if the pooldir is empty!
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| − | | |
| − | ./repair-pool < /export/perm/share/gridmapdir/.poolmap.20050816
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| − | | |
| − | and watch the results.
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