Some troubles with Cfengine3 book examples

[ysso...@gmail.com]

I think this is an excellent intro book for Cfengine3, and as a beginner, I started experimenting examples on this book's pages 30 & 31.

I tried the following 2 examples and got errors from both, and I don't know for which part I did wrong.

# cf-agent -V
CFEngine Core 3.5.0

# cat ex1.cf
body common control
{
          bundlesequence => { "blah" };
}

bundle agent blah
{
          services:
                "ssh";
}
# ps -ef|grep ssh
root      6284  2764  0 10:21 pts/0    00:00:00 grep ssh
# cf-agent -KI -f ex1.cf
2013-07-08T10:21:58-0700     info: /blah/services/'ssh': Service 'ssh' could not be invoked successfully
2013-07-08T10:21:58-0700    error: /blah/services/'ssh': A method attempted to use a bundle 'default:standard_services' that was apparently not defined
# ps -ef|grep ssh
root      6292  2764  0 10:21 pts/0    00:00:00 grep ssh



# cat ex2.cf

body common control
{
    bundlesequence => { "blah" };
}

bundle agent blah
{
    files:
        "/etc/resolv.conf"
        comment => "Hello",
        edit_line => replace_or_add(".*search.*", "search example.com");

}

# cf-agent -KI -f ex2.cf
/var/cfengine/inputs/ex2.cf:12:0: error: Undefined bundle replace_or_add with type edit_line
2013-07-08T10:19:13-0700    error: Policy failed validation with command '"/var/cfengine/bin/cf-promises" -c "/var/cfengine/inputs/ex2.cf"'


I guess I'm not using some very basic syntax in my learning experiments but couldn't find where I have such missing basics.

Any help would be appreciated.

Thanks!



- Young

[Ted Zlatanov]

On Mon, 8 Jul 2013 10:28:45 -0700 (PDT) ysso...@gmail.com wrote:

y> I think this is an excellent intro book for Cfengine3, and as a beginner, I
y> started experimenting examples on this book's *pages 30 & 31*.

y> I tried the following 2 examples and got errors from both, and I don't know
y> for which part I did wrong.

...
y> 2013-07-08T10:21:58-0700 error: /blah/services/'ssh': A method attempted
y> to use a bundle 'default:standard_services' that was apparently not defined*
...
y> */var/cfengine/inputs/ex2.cf:12:0: error: Undefined bundle replace_or_add
y> with type edit_line

You're missing the standard library.

In 3.5.0, add

inputs => { "libraries/cfengine_stdlib.cf" };

to your policy (in "body common control").

Ted

[ysso...@gmail.com]

Hi Ted,


Excellent! I just added it, and both examples work charm!

  inputs => { "libraries/cfengine_stdlib.cf" };

Thank you for your help.


- Young
 

[Diego Zamboni]

Indeed, as Ted points out you need to load the stdlib.

I'll make a note to add a clarification about this in the upcoming new release of the book :)

--Diego

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[ysso...@gmail.com]

Hi Diego,


Sure, thanks for the comment.

I had a good start with short, easy, yet interesting Chapters 1 and 2, unlike many other books with a whole bunch to grasp in the beginning chapters.

I'm sure you had this factor in mind when you wrote the book. :)

Thank you.


- Young

[Diego Zamboni]

Hi Young,

> I had a good start with short, easy, yet interesting Chapters 1 and 2, unlike many other books with a whole bunch to grasp in the beginning chapters.
>
> I'm sure you had this factor in mind when you wrote the book. :)

It was indeed one of the predominant criteria :)

Thanks for the nice comments!

--Diego