Merge remote branch 'nico/master'

This commit is contained in:
Steven Armstrong 2011-02-22 11:40:04 +01:00
commit 741275e967
21 changed files with 147 additions and 81 deletions

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@ -36,3 +36,4 @@ pub:
man:
echo $(MANSRC)
a2x -f manpage --no-xmllint doc/man/cdist-stages.text
echo man ./doc/man/cdist-stages.7

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@ -13,7 +13,6 @@ it ticks differently:
* cdist sticks completly to the KISS (keep it simple and stupid) paradigma
* cdist's core is very small (currently around 400 lines of code)
* There is only one type to extend cdist called ***type***.
*
* cdist is UNIX
* It reuses existing tools like cat, find, mv, ...
* cdist's documentation is bundled as manpages

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@ -11,7 +11,7 @@ x run initial manifest (stage 2)
x Create configuration tree from manifest
x write binaries, which create the tree when called from manifest (cdist_tree_wrapper)
- be able to run manifest of types (stage 3)
x be able to run manifest of types (stage 3)
x Parse configuration tree/objects recursively
x can/may types modify tree?
-> yes, of everything a type created itself!
@ -22,13 +22,6 @@ x run initial manifest (stage 2)
x rename $__object_dir to $__object_base_dir
x use $type/manifest instead of $type/init
x find $object_id in recursive runner (before merge)
- DOC document "cd $__object_dir, before running manifest" in doc/man/cdist-types.text
- DOC document that $type/manifest is executed for every object/instance
- DOC: types can always access
__cdist_out_objects, __cdist_out_explorers,
__cdist_out_execs
--> create cdist-variables document?
x generate code to be executed on clients (stage 4)
x for one object
@ -41,6 +34,7 @@ x execute code on client (stage 5)
- file (with directory)
- package
- doc cleanup for 1.0:
- ensure every file in bin/ has a correspondent manpage
- cdist manpage (main manpage)
- cleanup following man + their tree:
- cdist-language [CLEANUP AND REMOVE]
@ -72,3 +66,11 @@ x execute code on client (stage 5)
- create doc/dev/HACKERS_README
- Add install target to Makefile
- create cdist-config-init to create basic tree
- cdist-type integration!
- DOC document "cd $__object_dir, before running manifest" in doc/man/cdist-types.text
- DOC document that $type/manifest is executed for every object/instance
- DOC: types can always access __cdist_out_objects, __cdist_out_explorers, __cdist_out_execs
--> create cdist-variables document?
- include generation in makefile

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@ -21,8 +21,6 @@
# Print configuration directories - helper for all other scripts
#
echo teeeeeeeeeeeeeeeeeees
# Fail if something bogus is going on
set -u
@ -181,6 +179,13 @@ __cdist_object_source()
cat "${object_dir}/$__cdist_name_object_source"
}
__cdist_exec_fail_on_error()
{
sh -e "$@"
[ "$?" -eq 0 ] || __cdist_exit_err "Error: $1 exited non-zero."
}
__cdist_tmp_removal()
{
rm -rf "${__cdist_tmp_dir}"

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@ -41,17 +41,6 @@ if [ ! -x "${__cdist_manifest}" ]; then
__cdist_exit_err "${__cdist_manifest} needs to be executable."
fi
mkdir -p "${__cdist_output_dir}"
mkdir -p "${__cdist_output_dir}" || __cdist_exit_err "Cannot create output dir ${__cdist_output_dir}"
# Catch errors ourselves now
set +e
# Ensure manifest fails if any error exists - FIXME: redundant, cdist-object-codegen
(
set -e
. "${__cdist_manifest}"
); ret=$?
if [ "$ret" -ne 0 ]; then
__cdist_exit_err "Error: ${__cdist_manifest} exited non-zero."
fi
__cdist_exec_fail_on_error "${__cdist_manifest}"

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@ -54,19 +54,5 @@ if [ -x "$gencode" ]; then
eof
# Catch errors ourself now
set +e
(
# Ensure manifest fails if something within manifest fails
# And not all manifests need to include set -e themselves
set -e
. "$gencode"
); ret=$?
else
ret=0
fi
if [ "$ret" -ne 0 ]; then
__cdist_exit_err "Error: $gencode exited non-zero"
__cdist_exec_fail_on_error "$gencode"
fi

40
bin/cdist-quickstart Executable file
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@ -0,0 +1,40 @@
#!/bin/sh
#
# 2010-2011 Nico Schottelius (nico-cdist at schottelius.org)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist 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.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# Give the user an introduction into cdist
#
. cdist-config
set -eu
__prompt()
{
echo "Press enter to continue or ctrl-c to abort"
echo "[Enter]"
read answer
}
cat << eof
Welcome to cdist-quickstart, the interactive guide to cdist!
After you press enter, I'll create the basic directories for you.
eof

1
doc/dev/logs/README Normal file
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@ -0,0 +1 @@
Logfiles of discussions

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@ -1,5 +1,42 @@
## How to use cdist?
cdist-quickstart(1)
===================
Nico Schottelius <nico-cdist--@--schottelius.org>
NAME
----
cdist-quickstart - Make use of cinit in 5 minutes
DESCRIPTION
-----------
This document helps you to take the first steps with cdist.
We'll begin to configure the host "localhost" to have two files
in place, /etc/DO-NOT-CHANGE and /root/CDIST-ENABLED-HOST, which
both are used to warn other sysadmins that this system is managed
by configuration management and manual changes may get overwritten.
Begin to execute cdist-quickstart, it will show you the steps it
takes and explains what it does:
% cdist-quickstart
mkdir -p /etc/cdist/manifests
# Create
Cdist uses
kgives you an impression of
0. Create a host specification (/etc/cdist/hosts/**hostname**)
0. Add functionalilty to add
0. Run ***cdist-apply***
SEE ALSO
--------
cdist-config-layout(7)
COPYING
-------
Copyright \(C) 2010-2011 Nico Schottelius. Free use of this software is
granted under the terms of the GNU General Public License version 3 (GPLv3).
## How to use cdist?

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@ -5,76 +5,82 @@ Nico Schottelius <nico-cdist--@--schottelius.org>
NAME
----
cdist-stages - How the configuration is built
cdist-stages - Stages used during configuration deployment
DESCRIPTION
-----------
Starting the execution of deployment with cdist-deploy-to(1),
cdist passes through different stages, each can be triggered
and debugged on its own. Reading the source of the
cdist-deploy-to script shous the binaries being responsible
for each stage.
Starting the execution of deployment with cdist-deploy-to(1), cdist passes
through different stages, each can be triggered and debugged on its own.
Reading the source of the cdist-deploy-to executable shous the scripts
responsible for each stage.
STAGE 1: TARGET INFORMATION RETRIEVAL
--------------------------------------
In this stage information is collected about target using
so called explorers.
Every existing explorer is run on the target and the output
of all explorers are copied back into the local cache.
The results can be used by manifests and types.
In this stage information is collected about target using so called explorers.
Every existing explorer is run on the target and the output of all explorers
are copied back into the local cache. The results can be used by manifests and
types.
Related manpages are cdist-explorers(7) and cdist-cache(7).
STAGE 2: RUN THE INITIAL MANIFEST
---------------------------------
The initial manifest, which should be used for mappings
of hosts to types, is executed.
This stage creates objects in a cconfig database that
contains as defined in the manifest for the specific host.
In this stage, no conflicts may occur, i.e. no object of
the same type with the same id may be created.
The initial manifest, which should be used for mappings of hosts to types,
is executed. This stage creates objects in a cconfig database that contains
the objects as defined in the manifest for the specific host. In this stage,
no conflicts may occur, i.e. no object of the same type with the same id may
be created.
Related manpages are cdist-manifest-init(1), cdist-manifests(7) and
cdist-config-layout(7).
STAGE 3: EXECUTION OF TYPES
---------------------------
Every object is checked whether its type has an init
script (see cdist-types(7)). If the type of the object
has an init script, it is run. This init script may
generate additional objects.
Every object is checked whether its type has a manifest file. If the type has
a manifest file and it is executable, it will be executed. The manifest script
may generate and change the created objects. In other words, one type can reuse
other types.
For instance the object __apache/www.test.ch is of
type __apache, which may contain an init script, which
creates new objects of type __file.
For instance the object __apache/www.test.ch is of type __apache, which may
contain an manifest script, which creates new objects of type __file.
The newly created objects are merged back into the existing tree. No conflicts
may occur during the merge. A conflict would mean that two different objects
try to create the same object, which indicates a broken configuration.
Related manpage are cdist-types(7) and cdist-manifest-run-all(1).
The newly created objects are merged back into
the existing tree. No conflicts may occur during
the merge. A conflict would mean that two different
objects try to create the same object, which indicates a
broken configuration.
STAGE 4: CODE GENERATION
------------------------
The "gencode" binary of the types for every existing object is
called to generate code that will be executed on the target host.
In this stage for every created objects its type is checked whether it has a
gencode script. If the type has a gencode script and it is executable it will
be executed. This executable should create code to be executed on the target
on stdout. If the gencode executable fails, it must print diagnostic messages
on stderr and exit non-zero.
This binary should create code to be executed on the target on stdout.
Related manpages are cdist-types-gencode(7), cdist-gencode(1) and
cdist-gencode-all(1).
If the gencode binary fails, it must print diagnostic messages on stderr
and exit non-zero.
A description of what the generated code may/must/should
do can be found in cdist-types-gencode(7).
STAGE 5: CODE EXECUTION
-----------------------
The resulting code is transferred to the target host and executed,
the run of cdist-deploy-to(1) ends.
The resulting code from the previous stage is transferred to the target host
and executed there to apply the configuration changes,
Related manpages are cdist-exec-transfer(1) and cdist-exec-run(1).
SUMMARY
-------
If, and only if, all the stages complete without an errors, the configuration
will be applied to the target. Each stage can also be run individually, though
dependencies for each stage must be fulfilled and thus the stages must be run
in correct order.
SEE ALSO