Converting augeas snippet to puppet augeas resource

[Patrick Spinler]

(apologies in advance for the line wrap)

I have the following tidbit of augeas code, which inserts a rule into
/etc/sysconfig/iptables as the first rule of a specifically named chain;

# augtool> insert append before
"/files/etc/sysconfig/iptables/table/append[. = 'Mayo-Firewall-INPUT'][1]"
# augtool> match /files/etc/sysconfig/iptables/table/append[. = '']
# /files/etc/sysconfig/iptables/table/append[8] = (none)
# augtool> set /files/etc/sysconfig/iptables/table/append[. = '']
'Mayo-Firewall-INPUT'
# augtool> set /files/etc/sysconfig/iptables/table/append[. =
'Mayo-Firewall-INPUT'][1]/protocol 'tcp'
# augtool> set /files/etc/sysconfig/iptables/table/append[. =
'Mayo-Firewall-INPUT'][1]/match 'tcp'
# augtool> set /files/etc/sysconfig/iptables/table/append[. =
'Mayo-Firewall-INPUT'][1]/dport '31111'
# augtool> set /files/etc/sysconfig/iptables/table/append[. =
'Mayo-Firewall-INPUT'][1]/jump 'ACCEPT'
# augtool> print /files/etc/sysconfig/iptables/table/append[. =
'Mayo-Firewall-INPUT'][1]
# /files/etc/sysconfig/iptables/table/append[8] = "Mayo-Firewall-INPUT"
# /files/etc/sysconfig/iptables/table/append[8]/dport = "31111"
# /files/etc/sysconfig/iptables/table/append[8]/match = "tcp"
# /files/etc/sysconfig/iptables/table/append[8]/protocol = "tcp"
# /files/etc/sysconfig/iptables/table/append[8]/jump = "ACCEPT"

I'd like to convert this to a puppet augeas define. So far, I've got this:

define mayo_firewall_insert ($dport, $proto) {

augeas { "firewall_${title}":
context => "/files/etc/sysconfig/iptables/table",
# incl => "/etc/sysconfig/iptables",
# lens => "iptables.aug",
onlyif => "match append[dport='$dport'] size != 0",
changes => [
"insert append before append[. =
'Mayo-Firewall-INPUT'][1]",
"set append[. = ''] 'Mayo-Firewall-INPUT'",
"set append[. = 'Mayo-Firewall-INPUT'][1]/protocol
'$proto'",
"set append[. = 'Mayo-Firewall-INPUT'][1]/match '$proto'",
"set append[. = 'Mayo-Firewall-INPUT'][1]/dport '$dport'",
"set append[. = 'Mayo-Firewall-INPUT'][1]/jump 'ACCEPT'",
],
}

However, when I declare a resource using the above define, I get augeas
syntax errors, and I'm not sure how to track down the problem:

(invoked as 'puppet apply --verbose --debug --detailed-exitcodes
--execute "include omnibus_node"')

...
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas): Opening
augeas with root /, lens path , flags 32
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas): Augeas
version 1.1.0 is installed
Warning: Augeas[firewall_omnibus_tcp_4100](provider=augeas): Loading
failed for one or more files, see debug for /augeas//error output
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.save/error/pos = 115
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.save/error/line = 3
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.save/error/char = 0
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.save/error/lens =
/shares/nfs/unixarch/share/augeas/lenses/dist/shellvars.aug:163.12-.99:
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.save/error/message = Syntax error
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.orig/error/pos = 64
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.orig/error/line = 2
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.orig/error/char = 0
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.orig/error/lens =
/shares/nfs/unixarch/share/augeas/lenses/dist/shellvars.aug:163.12-.99:
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas):
/augeas/files/etc/sysconfig/iptables.orig/error/message = Syntax error
Debug: Augeas[firewall_omnibus_tcp_4100](provider=augeas): Closed the
augeas connection
...


I'm guessing the augeas tree isn't what I think it is by the time it
goes to save, but there doesn't appear to be a way to invoke 'print' or
some other, similar augeas command, so I can't tell.

Can anyone please advise how I might debug this?

Thanks,
-- Pat

[Cory Stoker]

Ouch my eyes... Augeas can wreck your day sometimes. I have to ask
though, why not use the Puppetlabs Firewall Module? It's here:
https://forge.puppetlabs.com/puppetlabs/firewall

Then you would do something like this:
firewall { 'mayo_fw TCP/31111':
ensure => present,
table => 'filter',
chain => 'Mayo-Firewall-INPUT',
proto => 'tcp',
dport => 31111,
action => 'accept',
} #End

As far as your output above it looks like it errored out on the files
iptables.save and iptables.orig? What's weird is you have incl
commented out which would make me think it should only load the one
path you specified.

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[Patrick Spinler]

I'm not using the puppet firewall module because, if I read the docs
correctly, I'd need to use that module to completely manage the firewall
settings, and it seems to require a good bit of setup to get there, too.

Unfortunately, due to political and organizational circumstance, I don't
have the ability to subsume the system's setup in that fashion. Maybe
someday. Until then, I can only add my extra stuff on top. Ergo, augeas.

As far as commenting out the incl and lens settings; I wasn't sure they
had the correct syntax and were working, or may even have been part of
the problem. Ergo, simplify, and comment out until then.

I'll try using them again, thanks.

-- Pat

[Patrick Spinler]

For what it's worth, leaving the incl => and lens => statements in did
the trick. Either that or cleaning up some of the iptables.save and
other similar files ahead of time.

I did have to figure out the correct format for the lens => statement,
which is apparently to use a capitalized lens name with a '.lns' suffix,
like 'Iptables.lns'. It wasn't clear from the documentation, and I had
tried the actual file name containing the lens, 'iptables.aug', first.
That's why I had initially commented these sections out.

The lens name clearly comes from the 'module' statement inside the lens
source file, iptables.aug, but where the '.lns' suffix comes from I have
no idea.

Anyway, thanks again,
-- Pat