Library seems to fail on CFE 3.5

[raags]

The directory structure seems to have changed considerable in CFE 3.5, so some of the README steps differ. I've managed to load the elf library and run the efl_main bundle, but now I"m getting the following error :

# cf-agent -I -K
2014-01-13T15:46:16+0530   notice: R: --> I'm a policy hub.
2014-01-13T15:46:16+0530   notice: R: Hello World!
2014-01-13T15:46:16+0530     info: M '"/var/cfengine/modules/return_index.pl" efl_main 1': 2014-01-13T15:46:16+0530   error: Couldn't run '/var/cfengine/modules/return_index.pl'. (execv: No such file or directory)

Do you know why the return_index.pl module is not being detected? The file is present and set to executable in that directory :

# cd modules/
# pwd
/var/cfengine/modules
# ls -al
total 12
drwx------.  2 root root 4096 Jan 13 15:24 .
drwxr-xr-x. 13 root root 4096 Jan 13 14:55 ..
-rwxr-xr-x.  1 root root  630 Jan 13 15:24 return_index.pl

promises.cf :

body common control
{
 bundlesequence => {
                 # Common bundles first for best practice 
                    def,

                 # Design Center
                    cfsketch_run,

                 # Agent bundles from here
                    main,
                    edit_motd,
                    efl_main("/var/cfengine/inputs/bundle.txt"),
 };

 inputs => {

         # Global common bundles
            "def.cf",

         # Control body for all agents
            "controls/cf_agent.cf",
            "controls/cf_execd.cf",
            "controls/cf_monitord.cf",
            "controls/cf_runagent.cf",
            "controls/cf_serverd.cf",

         # COPBL/Custom libraries.  Eventually this should use wildcards.
             @(cfengine_stdlib.inputs),

         # Design Center
             # MARKER FOR CF-SKETCH INPUT INSERTION
             "cf-sketch-runfile.cf",

         # User services from here
            "services/init_msg.cf",
            "lib/3.5/evolve_freelib.cf",
            "edit_motd.cf",
};

 version => "Community Promises.cf 3.4.0";

}

[neilhwatson]

Is return_index.pl installed on the client? I can't tell if the 'ls -al' and the error from cf-agent are from the same host. Also, the modules dir is 700 so the agent must be run by root.

[raags]

Yes, its on the same host, its a test box which itself is the policy server, and the agent is run as root.

[neilhwatson]

Run this policy with 'cf-agent -vlf /path/to/this_file.cf' and post the results:

body common control
{
    bundlesequence => { "main", };
}

bundle agent main
{
    classes:
        "ok" expression => usemodule( "return_index.pl", "x 3" );

    commands: 
        "/bin/ls -l ${sys.workdir}/modules/return_index.pl";
        "/bin/cat ${sys.workdir}/modules/return_index.pl";

    reports:
        ok::
            "return_index_pl => ${return_index_pl.x}";
}

[raags]

This is what I got :

[root@rhel6 ~]# cf-agent -vlf mod.cf 
cf3> Work directory is /var/cfengine
cf3> Looking for a source of entropy in '/var/cfengine/randseed'
cf3> Making sure that locks are private...
cf3> Checking integrity of the state database
cf3> Checking integrity of the module directory
cf3> Checking integrity of the PKI directory
cf3> Loaded private key at '/var/cfengine/ppkeys/localhost.priv'
cf3> Loaded public key '/var/cfengine/ppkeys/localhost.pub'
cf3> Setting cfengine default port to 5308, '5308'
cf3> Reference time set to 'Tue Jan 14 12:47:27 2014'
cf3> CFEngine Core 3.5.2
cf3> ------------------------------------------------------------------------
cf3> Host name is: rhel6
cf3> Operating System Type is linux
cf3> Operating System Release is 2.6.32-131.0.15.el6.x86_64
cf3> Architecture = x86_64
cf3> Using internal soft-class linux for host rhel6
cf3> The time is now Tue Jan 14 12:47:27 2014
cf3> ------------------------------------------------------------------------
cf3> Extended system discovery is only available in CFEngine Enterprise
cf3> Additional hard class defined as: 64_bit
cf3> Additional hard class defined as: linux_2_6_32_131_0_15_el6_x86_64
cf3> Additional hard class defined as: linux_x86_64
cf3> Additional hard class defined as: linux_x86_64_2_6_32_131_0_15_el6_x86_64
cf3> GNU autoconf class from compile time: compiled_on_linux_gnu
cf3> Address given by nameserver: 192.168.122.110
cf3> No interface exception file /var/cfengine/inputs/ignore_interfaces.rx
cf3> Interface 1: lo
cf3> Interface 2: eth0
cf3> IP address of host set to 192.168.122.110
cf3> Trying to locate my IPv6 address
cf3> Found IPv6 address fe80::5054:ff:fe97:3232
cf3> Looking for environment from cf-monitord...
cf3> Loading environment...
cf3> Environment data loaded
cf3> This appears to be a redhat (or redhat-based) system.
cf3> Looking for redhat linux info in 'Red Hat Enterprise Linux Server release 6.1 (Santiago)'
cf3> Found 1 processor
cf3> ***********************************************************
cf3>  Loading persistent classes 
cf3> ***********************************************************
cf3> ***********************************************************
cf3>  Loaded persistent memory 
cf3> ***********************************************************
cf3> This agent is bootstrapped to '192.168.122.110'
There is no readable input file at '/var/cfengine/inputs/mod.cf'. (stat: No such file or directory)
[root@rhel6 ~]# cp mod.cf /var/cfengine/inputs/
[root@rhel6 ~]# cf-agent -vlf mod.cf 
cf3> Work directory is /var/cfengine
cf3> Looking for a source of entropy in '/var/cfengine/randseed'
cf3> Making sure that locks are private...
cf3> Checking integrity of the state database
cf3> Checking integrity of the module directory
cf3> Checking integrity of the PKI directory
cf3> Loaded private key at '/var/cfengine/ppkeys/localhost.priv'
cf3> Loaded public key '/var/cfengine/ppkeys/localhost.pub'
cf3> Setting cfengine default port to 5308, '5308'
cf3> Reference time set to 'Tue Jan 14 12:48:32 2014'
cf3> CFEngine Core 3.5.2
cf3> ------------------------------------------------------------------------
cf3> Host name is: rhel6
cf3> Operating System Type is linux
cf3> Operating System Release is 2.6.32-131.0.15.el6.x86_64
cf3> Architecture = x86_64
cf3> Using internal soft-class linux for host rhel6
cf3> The time is now Tue Jan 14 12:48:32 2014
cf3> ------------------------------------------------------------------------
cf3> Extended system discovery is only available in CFEngine Enterprise
cf3> Additional hard class defined as: 64_bit
cf3> Additional hard class defined as: linux_2_6_32_131_0_15_el6_x86_64
cf3> Additional hard class defined as: linux_x86_64
cf3> Additional hard class defined as: linux_x86_64_2_6_32_131_0_15_el6_x86_64
cf3> GNU autoconf class from compile time: compiled_on_linux_gnu
cf3> Address given by nameserver: 192.168.122.110
cf3> No interface exception file /var/cfengine/inputs/ignore_interfaces.rx
cf3> Interface 1: lo
cf3> Interface 2: eth0
cf3> IP address of host set to 192.168.122.110
cf3> Trying to locate my IPv6 address
cf3> Found IPv6 address fe80::5054:ff:fe97:3232
cf3> Looking for environment from cf-monitord...
cf3> Loading environment...
cf3> Environment data loaded
cf3> This appears to be a redhat (or redhat-based) system.
cf3> Looking for redhat linux info in 'Red Hat Enterprise Linux Server release 6.1 (Santiago)'
cf3> Found 1 processor
cf3> ***********************************************************
cf3>  Loading persistent classes 
cf3> ***********************************************************
cf3> ***********************************************************
cf3>  Loaded persistent memory 
cf3> ***********************************************************
cf3> This agent is bootstrapped to '192.168.122.110'
cf3> Input file is outside default repository, validating it
cf3> Promises seem to change
cf3> Input file is changed since last validation, validating it
cf3> Verifying the syntax of the inputs...
cf3> Checking policy with command '"/var/cfengine/bin/cf-promises" -c "/var/cfengine/inputs/mod.cf"'
cf3> Parsing file '/var/cfengine/inputs/mod.cf'
cf3> Resolving variables in bundle 'main'
cf3> Running full policy integrity checks
cf3>  -> Hard classes = { 127_0_0_1 192_168_122_110 1_cpu 64_bit Afternoon Day14 GMT_Hr7 Hr12 Hr12_Q4 January Lcycle_1 Min45_50 Min48 PK_MD5_811fd0d062eb81c52cad26cd7718da93 Q4 Tuesday Yr2014 agent any cfengine cfengine_3 cfengine_3_5 cfengine_3_5_2 cfengine_in_high community_edition compiled_on_linux_gnu cpu0_high cpu_high diskfree_high_normal entropy_misc_in_low entropy_misc_out_low entropy_postgresql_in_low entropy_postgresql_out_low fe80__5054_ff_fe97_3232 inform_mode ipv4_127 ipv4_127_0 ipv4_127_0_0 ipv4_127_0_0_1 ipv4_192 ipv4_192_168 ipv4_192_168_122 ipv4_192_168_122_110 linux linux_2_6_32_131_0_15_el6_x86_64 linux_x86_64 linux_x86_64_2_6_32_131_0_15_el6_x86_64 linux_x86_64_2_6_32_131_0_15_el6_x86_64__1_SMP_Tue_May_10_15_42_40_EDT_2011 localhost localhost4 localhost4_localdomain4 localhost_localdomain mac_52_54_00_97_32_32 messages_high_normal net_iface_eth0 net_iface_lo otherprocs_high redhat redhat_6 redhat_6_1 redhat_s redhat_s_6 redhat_s_6_1 rhel6 rootprocs_high_normal smtp_in_high ssh_in_high users_high verbose_mode x86_64}
cf3>  -> Additional classes = {}
cf3>  -> Negated classes = {}
cf3> Executing and using module ["/var/cfengine/modules/return_index.pl" x 3]
cf3> Module context 'return_index_pl'
M '"/var/cfengine/modules/return_index.pl" x 3': Couldn't run '/var/cfengine/modules/return_index.pl'. (execv: No such file or directory)
cf3> Resolving variables in bundle 'main'
cf3> Additional class defined: am_policy_hub
cf3> Setting session ID, becoming process group leader
cf3>  -> Bundlesequence =>  {'main'}
cf3> *****************************************************************
cf3> BUNDLE main
cf3> *****************************************************************
cf3> 

cf3>    =========================================================
cf3>    classes in bundle main (1)
cf3>    =========================================================
cf3> 

cf3> Executing and using module ["/var/cfengine/modules/return_index.pl" x 3]
cf3> Module context 'return_index_pl'
M '"/var/cfengine/modules/return_index.pl" x 3': Couldn't run '/var/cfengine/modules/return_index.pl'. (execv: No such file or directory)
cf3> Adding local bundle class 'ok'
cf3> Resolving variables in bundle 'main'
cf3>      +  Private classes augmented:
cf3>      +       ok
cf3>      -  Private classes diminished:
cf3> 

cf3>    =========================================================
cf3>    commands in bundle main (1)
cf3>    =========================================================
cf3> 

cf3>     .........................................................
cf3>      Promise's handle: ''
cf3>      Promise made by: '/bin/ls -l /var/cfengine/modules/return_index.pl'
cf3>     .........................................................
cf3> 

cf3> Promiser string contains a valid executable '/bin/ls' - ok
Executing 'no timeout' ... '/bin/ls -l /var/cfengine/modules/return_index.pl'
cf3> (Setting umask to 77)
cf3> Additional promise info: source path '/var/cfengine/inputs/mod.cf' at line 12
cf3> Finished command related to promiser '/bin/ls -l /var/cfengine/modules/return_index.pl' -- succeeded
Q: ".../bin/ls -l /var": -rwxr-xr-x. 1 root root 630 Jan 13 15:24 /var/cfengine/modules/return_index.pl

Last 1 quoted lines were generated by promiser '/bin/ls -l /var/cfengine/modules/return_index.pl'
Completed execution of '/bin/ls -l /var/cfengine/modules/return_index.pl'
cf3>     .........................................................
cf3>      Promise's handle: ''
cf3>      Promise made by: '/bin/cat /var/cfengine/modules/return_index.pl'
cf3>     .........................................................
cf3> 

cf3> Promiser string contains a valid executable '/bin/cat' - ok
Executing 'no timeout' ... '/bin/cat /var/cfengine/modules/return_index.pl'
cf3> (Setting umask to 77)
cf3> Additional promise info: source path '/var/cfengine/inputs/mod.cf' at line 13
cf3> Finished command related to promiser '/bin/cat /var/cfengine/modules/return_index.pl' -- succeeded
Q: ".../bin/cat /var/c": #!/usr/bin/perl
Q: ".../bin/cat /var/c": # Prints an ordered number slist useful for ordered indexes.
Q: ".../bin/cat /var/c": sub error{
Q: ".../bin/cat /var/c":    $err = shift;
Q: ".../bin/cat /var/c":    print "Error: $err 
Q: ".../bin/cat /var/c": Usage return_index.pl <list var name> <positive integer>
Q: ".../bin/cat /var/c": Return Cfengine module array from 0 to given argument";
Q: ".../bin/cat /var/c": }
Q: ".../bin/cat /var/c": # validate
Q: ".../bin/cat /var/c": if ( scalar @ARGV != 2 ){
Q: ".../bin/cat /var/c":    error( "Wrong numer of args.");
Q: ".../bin/cat /var/c":    exit 1
Q: ".../bin/cat /var/c": }
Q: ".../bin/cat /var/c": $var_name = $ARGV[0];
Q: ".../bin/cat /var/c": $index_length = $ARGV[1];
Q: ".../bin/cat /var/c": if ( $index_length !~ m/^\d+$/ ){
Q: ".../bin/cat /var/c":    error( "Invalid arguement, integer expected." );
Q: ".../bin/cat /var/c":    exit 2
Q: ".../bin/cat /var/c": }
Q: ".../bin/cat /var/c": # main matter
Q: ".../bin/cat /var/c": print "\@$var_name= { ";
Q: ".../bin/cat /var/c": foreach $i ( 0 .. ($index_length - 1) ){
Q: ".../bin/cat /var/c":    print "'$i'";
Q: ".../bin/cat /var/c":    if ( $i < ($index_length - 1)) {
Q: ".../bin/cat /var/c":        print ', ';
Q: ".../bin/cat /var/c":    }
Q: ".../bin/cat /var/c": }
Q: ".../bin/cat /var/c": print "}\n";

Last 28 quoted lines were generated by promiser '/bin/cat /var/cfengine/modules/return_index.pl'
Completed execution of '/bin/cat /var/cfengine/modules/return_index.pl'
cf3> 

cf3>    =========================================================
cf3>    reports in bundle main (1)
cf3>    =========================================================
cf3> 

cf3>     .........................................................
cf3>      Promise's handle: ''
cf3>      Promise made by: 'return_index_pl => ${return_index_pl.x}'
cf3>     .........................................................
cf3> 

cf3> Additional promise info: source path '/var/cfengine/inputs/mod.cf' at line 17
cf3> Report: return_index_pl => ${return_index_pl.x}
R: return_index_pl => ${return_index_pl.x}
cf3> 

cf3>    =========================================================
cf3>    classes in bundle main (2)
cf3>    =========================================================
cf3> 

cf3> Executing and using module ["/var/cfengine/modules/return_index.pl" x 3]
cf3> Module context 'return_index_pl'
M '"/var/cfengine/modules/return_index.pl" x 3': Couldn't run '/var/cfengine/modules/return_index.pl'. (execv: No such file or directory)
cf3> Resolving variables in bundle 'main'
cf3>      +  Private classes augmented:
cf3>      +       ok
cf3>      -  Private classes diminished:
cf3> 

cf3>    =========================================================
cf3>    commands in bundle main (2)
cf3>    =========================================================
cf3> 

cf3> 

cf3>    =========================================================
cf3>    reports in bundle main (2)
cf3>    =========================================================
cf3> 

cf3> 

cf3>    =========================================================
cf3>    classes in bundle main (3)
cf3>    =========================================================
cf3> 

cf3> Executing and using module ["/var/cfengine/modules/return_index.pl" x 3]
cf3> Module context 'return_index_pl'
M '"/var/cfengine/modules/return_index.pl" x 3': Couldn't run '/var/cfengine/modules/return_index.pl'. (execv: No such file or directory)
cf3> Resolving variables in bundle 'main'
cf3>      +  Private classes augmented:
cf3>      +       ok
cf3>      -  Private classes diminished:
cf3> 

cf3>    =========================================================
cf3>    commands in bundle main (3)
cf3>    =========================================================
cf3> 

cf3> 

cf3>    =========================================================
cf3>    reports in bundle main (3)
cf3>    =========================================================
cf3> 

cf3> Bundle Accounting Summary for 'main'
cf3> Promises kept in 'main' = 0
cf3> Promises not kept in 'main' = 0
cf3> Promises repaired in 'main' = 3
cf3> Aggregate compliance (promises kept/repaired) for bundle 'main' = 100.0%
cf3> No lock purging scheduled
cf3> Logging total compliance, total 'Outcome of version (not specified) (agent-0): Promises observed to be kept 0%, Promises repaired 100%, Promises not repaired 0%'

[neilhwatson]

Do you have selinux enforcement on? What are the results of 'sestatus'? Can you run the module in the shell?

[raags]

It was perl :( there was no perl interpreter installed on the system for some reason. Thanks for your help!