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errors.

We now use a script to install RPMs.
(The only OS dependent thing was the path anyway)

(not to be confused with "tarballs") to download an RPM file.

like we do for jailed nodes.

to pass the whole -e argument to execvp, if it's quoted as a single
string.

run.

- getfree daemon doesn't die anymore when communcation with the plab dslice
  agent fails.

- the link classifier logic has been changed slightly to allow nodes
  to be classified as inet2 even if they don't reverse resolve.  The problem
  here is that intl nodes that don't resolve, but which go through abilene
  will look like inet2 nodes, which is wrong.  Manual verification of the
  node_auxtypes table is still recommended.

- The fping verifier has been disabled for now (since some plab nodes
  block ICMP traffic).

- made some error messages more descriptive

- plabnodes script now handles more agent communication errors gracefully
 (retries when if encounters them).

- rearranged plabnode's retry loops to be a little easier to read, and
  more general.

Eliminated the second call. The output from the first time is now used
to construct the file $BOOTDIR/tmcc.ifconfig

* Put a hosts file in /opt/config, which gets copied to /etc/hosts on
  the IXP.
* Put a resolv.conf in /opt/config, which gets copied to /etc on
  the IXP.
* Add support for startcmd, which will override the default boot.
* Do not squash root in the /opt export.

a time.

a little local loopback httpd server which now runs on all slivers of
the static utah1 slice.

It falls back to pushing the tarball from Emulab central if the local
fetch fails.  Also introduced the notion of versioning for the plab rootball.
For now, just chang the ROOTBALL_NAME def at the beginning of this file; I'd
like to move this into autoconf or the makefile eventually.

properly routable IPs addresses in the interfaces table.

- Not installing plabroot.tgz anymore
  - grrr, kept clobbering the one I was making by hand.  We should install
    and update this tarball out-of-band anyway

- Installs new fixsudo shell script.

Some PLAB dslice manager updates:

- in addition to asking the dslice agent (on plab) for a list of available
  nodes, we now also fping them all to weed out unresponsive ones.  One problem
  here is that several plab nodes block ICMP; could be solved by pinging with
  nmap (tries both a ICMP, and TCP ping).  This affects the plabdaemon getfree
  command, and subsequently which plab nodes appear as "up" in the DB

- Changed slice naming scheme:  we now append the experiment index onto the
  slice name to try to ensure uniqueness (emulab_<pid>_<eid>_<idx>)

- Modified plabnode to try to cope with flaky nodes - there is some retry
  code in there now

- Added the "fixsudo" shell script which is run very first as root (via the
  cumbersome "su" command) to fix sudoers for later sudo use on plab nodes.

Don't allow intraswitch links to vnodes on switches - they'll get
scored as direct links. Since LANs are now directly on switches, there
were situations where we could have scored the same link as either
direct or intraswitch, which results in two different scores. This can
cause those 'contact calfeld' warnings, and might have caused some
strange scoring fluxuations as assign ran.

When picking a link to a switch, for emulated links, pick the least
loaded link, not the one with the fewest users. This helps in situations
where the link bandwidths are heterogenous.

Change to make nodes with stale data unusable (give em a loadave of 999)

violations.