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Re: Stateless Linux experience...



If you don't have GQ, slap the phpldapadmin application on your computer. Since you have to run apache anyway, there's no harm in being able to see the ldap's internals while you work.

Jason

Mike Herrick wrote:
No html mail thanks.


Sorry 'bout that.


6) Because of the RAM problem above, I'm not sure that subsequent
invocations of "stateless-snapshooter -n -p DemoSystem" actually
worked as designed.  When I execute "stateless-snapshooter -l", I get:

Protosystems:
  DemoSystem

But it doesn't say anything about snapshots.  This makes me nervous.
What should the output look like?

Yeah, looks like there aren't any snapshots listed in LDAP.


Are there snapshots in /srv/stateless/snapshots?

	Maybe use GQ (GUI LDAP client) to poke around in LDAP to see if any
record of the snapshots are being made?


Part of the problem may be that I hadn't run 'stateless-servers -a'.  Do I
have to run this before or after taking a snapshot?  What values do I give
for nfs_path and rsync_path?

I don't have GQ, but here's the output of ldapsearch:

[root localhost tmp]# ldapsearch -x -b 'dc=stateless-test,dc=example,dc=com'
'(objectclass=*)'
# extended LDIF
#
# LDAPv3
# base <dc=stateless-test,dc=example,dc=com> with scope sub
# filter: (objectclass=*)
# requesting: ALL
#

# stateless-test.example.com
dn: dc=stateless-test,dc=example,dc=com
dc: stateless-test
objectClass: domain

# people, stateless-test.example.com
dn: ou=people,dc=stateless-test,dc=example,dc=com
objectClass: organizationalUnit
ou: people

# groups, stateless-test.example.com
dn: ou=groups,dc=stateless-test,dc=example,dc=com
objectClass: organizationalUnit
ou: groups

# services, stateless-test.example.com
dn: ou=services,dc=stateless-test,dc=example,dc=com
objectClass: organizationalUnit
ou: services

# stateless, services, stateless-test.example.com
dn: dc=stateless,ou=services,dc=stateless-test,dc=example,dc=com
objectClass: statelessContainer
dc: stateless

# hosts, stateless, services, stateless-test.example.com
dn: dc=hosts,dc=stateless,ou=services,dc=stateless-test,dc=example,dc=com
objectClass: statelessContainer
dc: hosts

# servers, stateless, services, stateless-test.example.com
dn: dc=servers,dc=stateless,ou=services,dc=stateless-test,dc=example,dc=com
objectClass: statelessContainer
dc: servers

# demo-group, groups, stateless-test.example.com
dn: cn=demo-group,ou=groups,dc=stateless-test,dc=example,dc=com
objectClass: posixGroup
cn: demo-group
gidNumber: 1000
memberUid: group-name

# demo-user, people, stateless-test.example.com
dn: uid=demo-user,ou=people,dc=stateless-test,dc=example,dc=com
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
uid: demo-user
uidNumber: 1000
gidNumber: 1000
cn: Demo User
sn: Demo User
homeDirectory: /home/users/demo-user
loginShell: /bin/bash
userPassword:: e1NTSEF9QVRNVUNxTnNod0g2enE1OTlHWnFOc3FpSzd5UnJSb1c=

# DemoSystem, stateless, services, stateless-test.example.com
dn:
statelessConfigurationName=DemoSystem,dc=stateless,ou=services,dc=stateles
 s-test,dc=example,dc=com
objectClass: statelessConfiguration
statelessConfigurationName: DemoSystem
statelessDefaultSnapshotName: DemoSystem-3

# DemoSystem-1, DemoSystem, stateless, services, stateless-test.example.com
dn:
statelessSnapshotName=DemoSystem-1,statelessConfigurationName=DemoSystem,d
 c=stateless,ou=services,dc=stateless-test,dc=example,dc=com
statelessSnapshotName: DemoSystem-1
objectClass: statelessSnapshot
statelessSnapshotServer: 6.6.6.1

# 00:02:b3:41:29:43, hosts, stateless, services, stateless-test.example.com
dn:
macAddress=00:02:b3:41:29:43,dc=hosts,dc=stateless,ou=services,dc=stateles
 s-test,dc=example,dc=com
objectClass: statelessClient
macAddress: 00:02:b3:41:29:43
statelessConfigurationName: DemoSystem

# status, 00:02:b3:41:29:43, hosts, stateless, services,
stateless-test.coren
 te.com
dn:
dc=status,macAddress=00:02:b3:41:29:43,dc=hosts,dc=stateless,ou=services,d
 c=stateless-test,dc=example,dc=com
objectClass: statelessClientStatus
dc: status

# DemoSystem-2, DemoSystem, stateless, services, stateless-test.example.com
dn:
statelessSnapshotName=DemoSystem-2,statelessConfigurationName=DemoSystem,d
 c=stateless,ou=services,dc=stateless-test,dc=example,dc=com
statelessSnapshotName: DemoSystem-2
objectClass: statelessSnapshot
statelessSnapshotServer: 6.6.6.1

# DemoSystem, servers, stateless, services, stateless-test.example.com
dn:
cn=DemoSystem,dc=servers,dc=stateless,ou=services,dc=stateless-test,dc=cor
 ente,dc=com
objectClass: statelessServer
cn: DemoSystem

# --nfs-path, servers, stateless, services, stateless-test.example.com
dn:
cn=--nfs-path,dc=servers,dc=stateless,ou=services,dc=stateless-test,dc=cor
 ente,dc=com
objectClass: statelessServer
cn: --nfs-path

# /srv/stateless/protosystems/DemoSystem, servers, stateless, services,
state
 less-test.example.com
dn:
cn=/srv/stateless/protosystems/DemoSystem,dc=servers,dc=stateless,ou=servi
 ces,dc=stateless-test,dc=example,dc=com
objectClass: statelessServer
cn: /srv/stateless/protosystems/DemoSystem

# DemoSystem-3, DemoSystem, stateless, services, stateless-test.example.com
dn:
statelessSnapshotName=DemoSystem-3,statelessConfigurationName=DemoSystem,d
 c=stateless,ou=services,dc=stateless-test,dc=example,dc=com
statelessSnapshotName: DemoSystem-3
objectClass: statelessSnapshot
statelessSnapshotServer: 6.6.6.1

# search result
search: 2
result: 0 Success

# numResponses: 19
# numEntries: 18
[root localhost tmp]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      10095152   5916920   3665416  62% /
/dev/hda1               101086      8947     86920  10% /boot
none                    127684         0    127684   0% /dev/shm
/dev/mapper/VGStateless-DemoSystem
                       4128448   3357000    561736  86%
/srv/stateless/protosystems/DemoSystem
/dev/mapper/VGStateless-DemoSystem_1
                       4128448   3338300    580436  86%
/srv/stateless/snapshots/DemoSystem/DemoSystem-1
/dev/mapper/VGStateless-DemoSystem_3
                       4128448   3338300    580436  86%
/srv/stateless/snapshots/DemoSystem/DemoSystem-3
[root localhost tmp]# stateless-snapshooter --list
Protosystems:
        DemoSystem


With these changes, I was able to get a machine to boot from the
snapshot, but there were many errors/warnings stemming from having a
read-only root (and /var) filesystem on a diskless client.

When I finally got the machine to boot, it wouldn't let me login!  I
suspect some read-only root problem during the login process that
prevented the login process from completing.

Its possible the snapshot process never completed, and so that snapshot wasn't properly prepared for readonly booting.


The readonly-root package was installed in the protosystem, and I verified
that /etc/rc.readonly exists in both the protosystem and the snapshot.

Mike.




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