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cfengine_stdlib.cf
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cfengine_stdlib.cf
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###########################################################################
# Copyright (C) Cfengine AS
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License LGPL as published by the
# Free Software Foundation; version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# To the extent this program is licensed as part of the Enterprise
# versions of Cfengine, the applicable Commerical Open Source License
# (COSL) may apply to this file if you as a licensee so wish it. See
# included file COSL.txt.
###########################################################################
#
# Cfengine Community Open Promise-Body Library
#
# This initiative started by Cfengine promotes a
# standardized set of names and promise specifications
# for template functionality within Cfengine 3.
#
# The aim is to promote an industry standard for
# naming of configuration patterns, leading to a
# de facto middleware of standardized syntax.
#
# Names should be intuitive and parameters should be
# minimal to assist readability and comprehensibility.
# Contributions to this file are voluntarily given to
# the cfengine community, and are moderated by Cfengine.
# No liability or warranty for misuse is implied.
#
# If you add to this file, please try to make the
# contributions "self-documenting". Comments made
# after the bundle/body statement are retained in
# the online docs
#
# Subversion : $Rev$
# For Cfengine Core: 3.1.0
###################################################
# If you find Cfengine useful, please consider #
# purchasing a commercial version of the software.#
###################################################
###################################################
# edit_line bundles
###################################################
bundle edit_line insert_lines(lines)
{
insert_lines:
"$(lines)"
comment => "Append lines if they don't exist";
}
##
bundle edit_line insert_file(templatefile)
{
insert_lines:
"$(templatefile)"
comment => "Insert the template file into the file being edited",
insert_type => "file";
}
##
bundle edit_line comment_lines_matching(regex,comment)
# Comment lines of a file matching a regex
{
replace_patterns:
"^($(regex))$"
replace_with => comment("$(comment)"),
comment => "Search and replace string";
}
##
bundle edit_line uncomment_lines_matching(regex,comment)
# Uncomment lines of a file where the regex matches
# the text after the comment string
{
replace_patterns:
"^$(comment)\s?($(regex))$"
replace_with => uncomment,
comment => "Uncomment lines matching a regular expression";
}
##
bundle edit_line comment_lines_containing(regex,comment)
# Comment lines of a file containing a regex
{
replace_patterns:
"^(.*$(regex).*)$"
replace_with => comment("$(comment)"),
comment => "Comment out lines in a file";
}
##
bundle edit_line uncomment_lines_containing(regex,comment)
# Uncomment lines of a file where the regex matches
# the text after the comment string
{
replace_patterns:
"^$(comment)\s?(.*$(regex).*)$"
replace_with => uncomment,
comment => "Uncomment a line containing a fragment";
}
##
bundle edit_line delete_lines_matching(regex)
{
delete_lines:
"$(regex)"
comment => "Delete lines matching regular expressions";
}
##
bundle edit_line warn_lines_matching(regex)
{
delete_lines:
"$(regex)"
comment => "Warn about lines in a file",
action => warn_only;
}
##
bundle edit_line append_if_no_line(str)
{
insert_lines:
"$(str)"
comment => "Append a line to the file if it doesn't already exist";
}
##
bundle edit_line append_if_no_lines(list)
{
insert_lines:
"$(list)"
comment => "Append lines to the file if they don't already exist";
}
##
bundle edit_line replace_line_end(start,end)
#
# Lines starting with "$(start)" will get the ending given in "$(end)",
# whitespaces will be left unmodified.
# For example, replace_line_end("ftp", "2121/tcp") would replace
# "ftp 21/tcp"
# with
# "ftp 2121/tcp"
{
field_edits:
"\s*$(start)\s.*"
edit_field => line("(^|\s)$(start)\s*", "2", "$(end)","set");
}
##
bundle edit_line append_to_line_end(start,end)
#
# Lines starting with "$(start)" and not ending with "$(end)"
# will get appended with "$(end)", whitespaces will be left unmodified.
# For example, append_to_line_end("kernel", "vga=791") would replace
# "kernel /boot/vmlinuz root=/dev/sda7"
# with
# "kernel /boot/vmlinuz root=/dev/sda7 resume=/dev/sda9 vga=791"
#
# WARNING: Be careful not to have multiple promises matching the same line,
# which would result in the line growing indefinetively.
{
field_edits:
"\s*$(start)\s.*"
edit_field => line("(^|\s)$(start)\s*", "2", "$(end)","append");
}
##
bundle edit_line resolvconf(search,list)
# search is the search domains with space
# list is an slist of nameserver addresses
{
delete_lines:
"search.*" comment => "Reset search lines from resolver";
"nameserver.*" comment => "Reset nameservers in resolver";
insert_lines:
"search $(search)" comment => "Add search domains to resolver";
"nameserver $(list)" comment => "Add name servers to resolver";
}
##
bundle edit_line set_variable_values(v)
# Sets the RHS of variables in the file of the form
# LHS = RHS
# Adds a new line if no LHS exists, repairs RHS values if one does exist
#
# To use:
# 1) Define an array, where the keys are the LHS and the values are the RHS
# "stuff[lhs-1]" string => "rhs1";
# "stuff[lhs-2]" string => "rhs2";
# 2) The parameter passed to the edit_line promise is the fully qualified
# name of the array (i.e., "bundlename.stuff") WITHOUT any "$" or "@"
{
vars:
"index" slist => getindices("$(v)");
# Be careful if the index string contains funny chars
"cindex[$(index)]" string => canonify("$(index)");
field_edits:
# match a line starting like the key = something
"\s*$(index)\s*=.*"
edit_field => col("=","2","$($(v)[$(index)])","set"),
classes => if_ok("$(cindex[$(index)])_in_file"),
comment => "Match a line starting like key = something";
insert_lines:
"$(index)=$($(v)[$(index)])",
comment => "Insert a variable definition",
ifvarclass => "!$(cindex[$(index)])_in_file";
}
bundle edit_line set_config_values(v)
# Sets the RHS of configuration items in the file of the form
# LHS RHS
# If the line is commented out with #, it gets uncommented first.
# Adds a new line if none exists.
# The argument is the fully-qualified name of an associative array containing v[LHS]="rhs"
{
vars:
"index" slist => getindices("$(v)");
# Be careful if the index string contains funny chars
"cindex[$(index)]" string => canonify("$(index)");
replace_patterns:
# If the line is there, maybe commented out, uncomment and replace with
# the correct value
"^\s*($(index)\s+(?!$($(v)[$(index)])).*|# ?$(index)\s+.*)$"
replace_with => value("$(index) $($(v)[$(index)])"),
classes => always("replace_attempted_$(cindex[$(index)])");
insert_lines:
"$(index) $($(v)[$(index)])"
ifvarclass => "replace_attempted_$(cindex[$(index)])";
}
bundle edit_line set_config_values_matching(v,pat)
# Sets the RHS of configuration items in the file of the form
# LHS RHS
# If the line is commented out with #, it gets uncommented first.
# Adds a new line if none exists.
# Only elements of "v" that match the regex "pat" are used
# The argument is the fully-qualified name of an associative array containing v[LHS]="rhs"
{
vars:
"allparams" slist => getindices("$(v)");
"index" slist => grep("$(pat)", "allparams");
# Be careful if the index string contains funny chars
"cindex[$(index)]" string => canonify("$(index)");
replace_patterns:
# If the line is there, maybe commented out, uncomment and replace with
# the correct value
"^\s*($(index)\s+(?!$($(v)[$(index)])).*|# ?$(index)\s+.*)$"
replace_with => value("$(index) $($(v)[$(index)])"),
classes => always("replace_attempted_$(cindex[$(index)])");
insert_lines:
"$(index) $($(v)[$(index)])"
ifvarclass => "replace_attempted_$(cindex[$(index)])";
}
##
bundle edit_line append_users_starting(v)
# For adding to /etc/passwd or etc/shadow, needs
# an array v[username] string => "line..."
{
vars:
"index" slist => getindices("$(v)");
classes:
"add_$(index)" not => userexists("$(index)");
insert_lines:
"$($(v)[$(index)])",
comment => "Append users into a password file format",
ifvarclass => "add_$(index)";
}
##
bundle edit_line append_groups_starting(v)
# For adding groups to /etc/group, needs
# an array v[groupname] string => "line..."
{
vars:
"index" slist => getindices("$(v)");
classes:
"add_$(index)" not => groupexists("$(index)");
insert_lines:
"$($(v)[$(index)])",
comment => "Append users into a group file format",
ifvarclass => "add_$(index)";
}
##
bundle edit_line set_colon_field(key,field,val)
# Set the value of field number "field" of the
# line whose first field is "key", in a colon-separated file.
{
field_edits:
"$(key):.*"
comment => "Edit a colon-separated file, using the first field as a key",
edit_field => col(":","$(field)","$(val)","set");
}
##
bundle edit_line set_user_field(user,field,val)
# Set the value of field number "field" in
# a :-field formatted file like /etc/passwd
{
field_edits:
"$(user):.*"
comment => "Edit a user attribute in the password file",
edit_field => col(":","$(field)","$(val)","set");
}
##
bundle edit_line append_user_field(group,field,allusers)
# For adding users to to a file like /etc/group
# at field position "field", comma separated subfields
{
vars:
"val" slist => { @(allusers) };
field_edits:
"$(group):.*"
comment => "Append users into a password file format",
edit_field => col(":","$(field)","$(val)","alphanum");
}
##
bundle edit_line expand_template(templatefile)
# Read in the named text file and expand $(var)
# inside the file
{
insert_lines:
"$(templatefile)"
insert_type => "file",
comment => "Expand variables in the template file",
expand_scalars => "true";
}
bundle edit_line replace_or_add(pattern,line)
# Replace a pattern in a file with a single line.
# If the pattern is not found, add the line to the file.
# The pattern must match the whole line (it is automatically
# anchored to the start and end of the line) to avoid
# ambiguity.
{
vars:
"cline" string => canonify("$(line)");
replace_patterns:
"^(?!$(line)$)$(pattern)$"
replace_with => value("$(line)"),
classes => always("replace_done_$(cline)");
insert_lines:
"$(line)"
ifvarclass => "replace_done_$(cline)";
}
##
bundle agent cronjob(commands,user,hours,mins)
# For adding lines to crontab for a user
# methods:
# "cron" usebundle => cronjob("/bin/ls","mark","*","5,10");
{
vars:
SuSE::
"crontab" string => "/var/spool/cron/tabs";
redhat|fedora::
"crontab" string => "/var/spool/cron";
!(SuSE|redhat|fedora)::
"crontab" string => "/var/spool/cron/crontabs";
files:
!windows::
"$(crontab)/$(user)"
comment => "A user's regular batch jobs are added to this file",
create => "true",
edit_line => append_if_no_line("$(mins) $(hours) * * * $(commands)"),
perms => mo("644","$(user)"),
classes => if_repaired("changed_crontab");
processes:
changed_crontab::
"cron"
comment => "Most crons need to be huped after file changes",
signals => { "hup" };
}
##
## editing bodies
##
body edit_field quoted_var(newval,method)
{
field_separator => "\"";
select_field => "2";
value_separator => " ";
field_value => "$(newval)";
field_operation => "$(method)";
extend_fields => "false";
allow_blank_fields => "true";
}
##
body edit_field col(split,col,newval,method)
{
field_separator => "$(split)";
select_field => "$(col)";
value_separator => ",";
field_value => "$(newval)";
field_operation => "$(method)";
extend_fields => "true";
allow_blank_fields => "true";
}
##
body edit_field line(split,col,newval,method)
{
field_separator => "$(split)";
select_field => "$(col)";
value_separator => " ";
field_value => "$(newval)";
field_operation => "$(method)";
extend_fields => "true";
allow_blank_fields => "true";
}
##
body replace_with value(x)
{
replace_value => "$(x)";
occurrences => "all";
}
##
body select_region INI_section(x)
{
select_start => "\[$(x)\]\s*";
select_end => "\[.*\]\s*";
}
##
## edit_defaults
##
body edit_defaults std_defs
{
empty_file_before_editing => "false";
edit_backup => "false";
max_file_size => "300000";
}
##
body edit_defaults empty
{
empty_file_before_editing => "true";
edit_backup => "false";
max_file_size => "300000";
}
##
body edit_defaults no_backup
{
edit_backup => "false";
}
##
## location
##
body location start
{
before_after => "before";
}
##
body location after(str)
{
before_after => "after";
select_line_matching => "$(str)";
}
##
body location before(str)
{
before_after => "before";
select_line_matching => "$(str)";
}
##
## replace_with
##
##
body replace_with comment(c)
{
replace_value => "$(c) $(match.1)";
occurrences => "all";
}
##
body replace_with uncomment
{
replace_value => "$(match.1)";
occurrences => "all";
}
####################################################
## agent bodyparts
####################################################
##
## action
##
body action if_elapsed(x)
{
ifelapsed => "$(x)";
expireafter => "$(x)";
}
##
body action measure_performance(x)
{
measurement_class => "Detect changes in $(this.promiser)";
ifelapsed => "$(x)";
expireafter => "$(x)";
}
##
body action warn_only
{
action_policy => "warn";
ifelapsed => "60";
}
##
body action bg(elapsed,expire)
{
ifelapsed => "$(elapsed)";
expireafter => "$(expire)";
background => "true";
}
##
body action ifwin_bg
{
windows::
background => "true";
}
##
body action immediate
{
ifelapsed => "0";
}
##
body action policy(p)
{
action_policy => "$(p)";
}
##
# Log a message to log=[/file|stdout]
body action log_repaired(log,message)
{
log_string => "$(sys.date), $(message)";
log_repaired => "$(log)";
}
###
body action log_verbose
{
log_level => "verbose";
}
##
## contain
##
body contain silent
{
no_output => "true";
}
##
body contain in_dir(s)
{
chdir => "$(s)";
}
##
body contain in_dir_shell(s)
{
chdir => "$(s)";
useshell => "true";
}
##
body contain silent_in_dir(s)
{
chdir => "$(s)";
no_output => "true";
}
##
body contain in_shell
{
useshell => "true";
}
##
body contain in_shell_bg
{
useshell => "true";
background => "true";
}
##
body contain in_shell_and_silent
{
useshell => "true";
no_output => "true";
}
##
body contain setuid(x)
{
exec_owner => "$(x)";
useshell => "false";
}
##
body contain setuid_sh(x)
{
exec_owner => "$(x)";
useshell => "true";
}
##
body contain setuidgid_sh(owner,group)
{
exec_owner => "$(owner)";
exec_group => "$(group)";
useshell => "true";
}
##
body contain jail(owner,root,dir)
{
exec_owner => "$(owner)";
useshell => "true";
chdir => "$(dir)";
chroot => "$(root)";
}
##
## classes
##
body classes if_repaired(x)
{
promise_repaired => { "$(x)" };
}
##
body classes if_else(yes,no)
{
promise_kept => { "$(yes)" };
promise_repaired => { "$(yes)" };
repair_failed => { "$(no)" };
repair_denied => { "$(no)" };
repair_timeout => { "$(no)" };
}
##
body classes cf2_if_else(yes,no)
# meant to match cf2 semantics
{
promise_repaired => { "$(yes)" };
repair_failed => { "$(no)" };
repair_denied => { "$(no)" };
repair_timeout => { "$(no)" };
}
##
body classes if_notkept(x)
{
repair_failed => { "$(x)" };
repair_denied => { "$(x)" };
repair_timeout => { "$(x)" };
}
##
body classes if_ok(x)
{
promise_repaired => { "$(x)" };
promise_kept => { "$(x)" };
}
##
body classes cmd_repair(code,cl)
{
repaired_returncodes => { "$(code)" };
promise_repaired => { "$(cl)" };
}
##
## Persistent classes
##
body classes state_repaired(x)
{
promise_repaired => { "$(x)" };
persist_time => "10";
}
##
body classes enumerate(x)
#
# This is used by commercial editions to count
# instances of jobs in a cluster
#
{
promise_repaired => { "mXC_$(x)" };
promise_kept => { "mXC_$(x)" };
persist_time => "15";
}
##
body classes always(x)
# Define a class no matter what the outcome of the promise is
{
promise_repaired => { "$(x)" };
promise_kept => { "$(x)" };
repair_failed => { "$(x)" };
repair_denied => { "$(x)" };
repair_timeout => { "$(x)" };
}
###################################################
# agent bundles
###################################################
##..................................................
## files promises
##..................................................
##
## copy_from
##
body copy_from secure_cp(from,server)
{
source => "$(from)";
servers => { "$(server)" };
compare => "digest";
encrypt => "true";
verify => "true";
}
##
body copy_from remote_cp(from,server)
{
servers => { "$(server)" };
source => "$(from)";
compare => "mtime";
}
##
body copy_from remote_dcp(from,server)
{
servers => { "$(server)" };
source => "$(from)";
compare => "digest";
}
##
body copy_from local_cp(from)
{
source => "$(from)";
}
##
body copy_from local_dcp(from)
{
source => "$(from)";
compare => "digest";
}
##
body copy_from perms_cp(from)
{
source => "$(from)";
preserve => "true";
}
body copy_from backup_local_cp(from)
# Local copy, keeping a backup of old versions
{
source => "$(from)";
copy_backup => "timestamp";
}
##
# Copy only if the file does not already exist, i.e. seed the placement
body copy_from seed_cp(from)
{
source => "$(from)";
compare => "exists";
}
##
body copy_from sync_cp(from,server)
{
servers => { "$(server)" };
source => "$(from)";
purge => "true";