Forum: CFEngine Help
Subject: Re: About "new" templates correct usage or limitations
Author: th
Link to topic: https://cfengine.com/forum/read.php?3,26723,26812#msg-26812
One more thing I'm noticing :
- edit_template seems to start emptying the file, so execution time is the same
for each run, again quite too long for big files since it checks for duplicate
lines/
- expand_template is quite faster if the file does not exist, but it it does,
it checks for already inserted lines, which can make subsequent runs quite long
as well
With the a template file such as :
# wc -l test.tmpl
515 test.tmpl
# cat test.tmpl
This is the test template line number 1
This is the test template line number 2
# Comment
# Comment
# Comment
This is the test template line number 3
This is the test template line number 4
VAR1 = $(test_tmpl.var1)
This is the test template line number 5
This is the test template line number 6
VAR2 = $(test_tmpl.var2)
This is the test template line number 7
[...]
This is the test template line number 500
1. Using edit_template
body common control
{
bundlesequence => { "test_tmpl" };
inputs => { "cfengine_stdlib.cf" } ;
}
bundle agent test_tmpl
{
vars:
"dir" string => "/root/TEMPLATES" ;
"test_tmpl" string => "test.tmpl" ;
"test" string => "test" ;
"var1" string => "VALUE1" ;
"var2" string => "VALUE2" ;
files:
"$(dir)/$(test)"
edit_template => "$(dir)/$(test_tmpl)",
create => "true";
}
1.a) first run, starting with a non-existent file :
# ls -l test
ls: cannot access test: No such file or directory
# time cf-agent -K -f ./test-templates.cf
real 0m0.193s
user 0m0.183s
sys 0m0.011s
1.b) second run :
# ls -l test
-rw------- 1 root root 20931 Jul 31 18:51 test
# time cf-agent -K -f ./test-templates.cf
real 0m0.192s
user 0m0.179s
sys 0m0.015s
2. Using expand_template
# cat test-templates.cf
body common control
{
bundlesequence => { "test_tmpl" };
inputs => { "cfengine_stdlib.cf" } ;
}
bundle agent test_tmpl
{
vars:
"dir" string => "/root/TEMPLATES" ;
"test_tmpl" string => "test.tmpl" ;
"test" string => "test" ;
"var1" string => "VALUE1" ;
"var2" string => "VALUE2" ;
files:
"$(dir)/$(test)"
edit_line => expand_template("$(dir)/$(test_tmpl)"),
create => "true";
}
2.a) first run, starting with an empty file
# ls -l test
ls: cannot access test: No such file or directory
# time cf-agent -K -f ./test-templates.cf
real 0m0.045s
user 0m0.031s
sys 0m0.014s
2.b) second run
# ls -l test
-rw------- 1 root root 20960 Jul 31 18:58 test
# time cf-agent -K -f ./test-templates.cf
real 0m0.094s
user 0m0.083s
sys 0m0.009s
So, I'm sorry but I still don't quite understand what is the best way to
promise a whole, possibly large file.
Seems to me that either edit_template or expand_template could be too long for
"large" files and using edit_lines with iteration over the content of an array
would require building manually a huge array (even if it can then take
advantage of the auto-looping feature)...
Thanks for your patience...
--
TH
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