Difference between revisions of "CFEngine3 Node"

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−
Webhuis facilitates and encourages attendees to The CFEngine Roadshow to configure a blank VM of choice.
 +
Webhuis facilitates and encourages attendees to The CFEngine Roadshow to configure a blank VM of choice. We are in the process of supporting as many platforms as possible. We do have full support for debian_7 and debian_8 and partly ubuntu_14. We are working and in need of support for centos_*. We are working on opensuse_13. Mint, Gentoo, Raspberry Pi and Androids geeks are more than welcome.
 
= Pre requisities =
  
= Pre requisities =
−
== Install a blank Virtual Machine ==
 +
== Fair use policy ==
  +
Every individual who is using the facilities of The CFEngine Roadshow states he or she complies with the following:
−
Please have your bare Virtual Machine ready before you take part in The CFEngine Roadshow.
  
  +
# Will follow the instuctions given during The CFEngine Roadshow
  +
# Will not disturb The CFEngine Roadshow by any kind of attacks to any of the The CFEngine Roadshow systems, it is a live demonstration not a Cracker Camp
  +
# Will not copy Commercial Software to any of the common CFEngine Roadshow utility systems
  +
# Will report if the number of bootstrapped agents exceeds the count of ten, in order to receive an award
  +
Happy bootstrapping!
  +
  +
== Create a blank Virtual Machine ==
  +
Please have your bare Virtual Machine ready before you take part in The CFEngine Roadshow. Please install a bare machine and make it as lean as possible. You even do not need to install ssh, we probably replace it anyway, just use VNC.<br/>
  +
We assume a KVM VM. Good descriptions for are avaiable [http://docs.openstack.org/image-guide/content/virt-install.html here virt-install]. Example code:
  +
<pre>
  +
# qemu-img create -f qcow2 /data/centos-6.4.qcow2 10G
  +
# virt-install --virt-type kvm --name centos-6.4 --ram 1024 \
  +
--cdrom=/data/CentOS-6.4-x86_64-netinstall.iso \
  +
--disk path=/data/centos-6.4.qcow2,size=10,format=qcow2 \
  +
--network network=default\
  +
--graphics vnc,listen=0.0.0.0 --noautoconsole \
  +
--os-type=linux --os-variant=rhel6
  +
</pre>
  +
=== Centos 7 ===
  +
Netinstall CentOS-7.0-1406-x86_64-NetInstall.iso
  +
* Zet eerst het netwerk aan
  +
* Selecteer de mirror: http://mirror.centos.org/centos/7/os/x86_64/
  +
  +
= CFEngine Roadshow Services =
  +
The CFEngine Roadshow offers services to support the creation and configuration of Nodes.
  +
== Private key cfetest ==
  +
It is recommended to create a cfetest user on your preferred machine and have the enclosed private key available in the .ssh directory. Then create the file id_rsa with permissions 700 and copy the key content into the file. The passphrase of the key is CFEngine_Roadshow.
  +
<pre>
  +
-----BEGIN RSA PRIVATE KEY-----
  +
Proc-Type: 4,ENCRYPTED
  +
DEK-Info: AES-128-CBC,A5D6E322AA20CF2FC2B1FBCB9A86AF57
  +
  +
+tgxD1apbr5OoxVXoIrSaF3Q3HyRcacnV4mliVB9NQ2xns4fwfF12R3wH0+8aJMn
  +
PLNcmBER9iSdvQvm9ZbNEifzhdkRp08lPK6j2e2A/Rn4ksYXdfXZw7l6G7T+w8Yo
  +
zIUIvOg85vGOhH6VZ4tlYhMy3Mq4i4RAXbstAgxq3GI+eFqohzVxUE/+ZbgJ8twh
  +
dh2jyAP2KQzKbGFybM1l9iqQPYXRQPyC7wRskl75Eqs7kwAcPfgVoJA2YLue4meh
  +
w38EA6I4t3787mGUtnPxcsiXQxmo/Z8lw0Dh2KDXHTsknXBsAICG0+9kK1UK/+b+
  +
/NLGRg+kYIiCVUQnHwgJ+TB7+IZVCs55u4zq7xT+iZ3CH2gK7DpQxco8YX3oT6tm
  +
3xo+jQk/4GJOsYu52j60ZrABMTfBtfTKOkTAg+7g4uzCcCJAIZPKnUL4uNPmxAy1
  +
/QaxEpblLo+Qi1jqGYPeL72YnmUbEpExJ7Ryswe/GcbRCTfBDs615q45PSMl8VyD
  +
cyCnu4PM/ZBctPRUF/QTQE1ACJQtnSETFxRgyOHnSGBRWrPQIFfIuqU06F9Fn0Ku
  +
CstZhbotergNzI1zEwOWm/2HOzUN4x1UerMTDJlKz/wegbgBYNcJvdiniODAMEN7
  +
psDolgdun0i0jxEuTkwoM+r9cGqEsWUlmWyvyIrqc5PgLFejVc6Q8PH1rJZrbxgQ
  +
tIs80ozF13WjJ9Hh8sv09d/C35TEwTMuKBhdyGBISrp/AaE7S+jPNTw2IIFTLYCI
  +
N++sTL8FWi0mT/+xJxss/VTp5CccPjCAjGTGjYF0yazHWXuBfP+dkasL5StIzpi3
  +
SRIIpHnFwinH9czg9sC8HO4O64hK4WegOw5+3rE1GUjBaPzH+20qtG94GQSJ/65i
  +
FB1/Kjwv1MA50cnsu0TuWk84RrnzBkE0SA6wbgmy7BiGl/Yr8iipOD0HW7hu6osX
  +
QiYaHrxkhYyj8Ai/0+9zXQnyb9wa4sAaA+BYW10rjpw6yaEFnzDgdH5f5n6zoiH/
  +
SmC62uh1BafIWcq2Be7tIEukse9PieMmFhwPA4Jo94oFzbU2mQxyrzG6m1L4O1SC
  +
P7by2dcRF/tf673/siCWOpIWSa1GPWB7uKMyP2GkYJWwtS+20D1GsKb6IuJicLwQ
  +
aZbW57AprIBDW7eRNPPEvbmScDeO+DuoRTbHvonPhGEf+YDAV0EqZXT0gKe/cqB7
  +
m46r7yhWrFGq85oLw+lbzPsLaXGPO2QC7pan2TNfXYGquu8u8pja+YK5Ao/V2S7M
  +
518IG9lxFblGp8h8IK5nPPxjNF9JtHFBWmLLt29i01xNk4lcxwiUJA44KSjX9ETg
  +
P8ihWNonJEWJgHbnyqv4KWzffY8hwiQwx4cMj4ZD9RyntdH1S3vc8gcD8MAi+CTL
  +
I/wbGYPJJ1OF2KY6qlo1qSi5vEKR3fbKsrJD9l+4YBCHaSy9FP2IkkjpAiH++NMS
  +
K35HhMinqAXU0lUKdHWSeJ1SDULkz0hdAaLe7xoXgw3/0xbBxE8+fKab85cKgS13
  +
dG0ckHCrCsjtTXoXXq/6eaCFvHM5V6PXXkZtLp6OkD+VK4wm81em5pHYQbN9yfq0
  +
vS6CMTqKVC3CyQ1lD6QMHaJxbpkbyM/U1jXVxqZTfRgFg8f9VQphYAmhsf8VOSBt
  +
WGEbxEqZBmm5udixfP3c4bOk40O1tsH5pNC+5pT+Hb0cnQ7g4ZQAs0alhNzOyp2+
  +
z4T/lzsQzeDO5hkc3A6U3pkPmj859BNKEUhMjX4Mv8W+2OSIpNadckpivvzsoKOi
  +
aQsKS3oo7Dls5h0CB67xkW/UIpMov6ySfDGYqqc6Ccj1hdqgnKj7uzUoCLY5I5/i
  +
1dEbYvRrM81AMU6o1+N6+DtdtVnVElVErzUOXC8G8BO3gaWIojKmhbc7H1jhDcQ/
  +
l+owXdOw5yQPwr8TnWVUZDjLPjvYRdqq25CZd6J4VpvjEvXZu/ukdZnRZHW3Aqo4
  +
jV2IaVm6MqLdIFqbSbkLj2EKaDQOr60zrpRgnc+oaHfBtXTLSH4tVaEHf9NtQiNN
  +
aachiKneIyAo85qxu8JM5LLgClckJVqtRtM3yFert7fVmeNDXy4VK6cE1OKhJRYw
  +
RIa6JaqtQnDuM5fCIZdKJIKTJNYX7je9VW4DGVmExuRiKTD9GRzvnDAYAydZt52X
  +
tVF9wWGOvqfw6IZRv7vTOxsWdIuVmOjn1AJV9WSvmyFWrDdhPAfGx8BsBAow7npZ
  +
xO5S0tTi0MgWUqNBttTsBPAkTAzHLUE2xs1dfZtAFkgPKsOjlR4DsWEbVRLAcScf
  +
OLHjXCE8+TQVBrjMCYTZJo3mu/fZCnjTUGuaQcJFYi28zPU8dSAZ3b8ehWFMEUzv
  +
HMt4CgJzuvNx01kt84aimO1H5mYRLTDFofqwn1jDYjijWZ44ykeiZHrQGUwC6bLL
  +
A0Fwp2SIjjZFQrsgtdh+OerVp68UtZ3T5A4+WnbNWV7U8iWc2Edc4aw7+7zz9TyF
  +
eOn68ySVIcaTrepBML3xfCFTAUzvn4/KJyNC+HKr/pJe9RozXmIjZQXexib5mX87
  +
VJ3u0PIbN458ls2kgP4EMbWpr1oInuzSKmWlIn5yCxQsLHQ2A0/vDu2451yGXoj1
  +
Dc1y7CTBUrtDrZheuZ6MrSXJ7BO7yKPjcncUHkWZIfuMLJqjIChMRVHldvDXfQ/r
  +
WKnqs3hAgEF/GoCg5VGZJk/RECAQCNag7ZhPlrhqRGlXSwCXi2vBXUMc69Iejxc6
  +
Ri0W3RBaIEvEg5Z8WGKCFhuZ2jJxn2FTvA7HROeWdfjIDbNj6xkmJEt3Somrdtdk
  +
4gh+E/DKicjv9W13OBq9veOcn791oWkL1FJ/97MU4T65nGcV0nbb4IdvDxzsb0V0
  +
ZnyZG5Ijv21NURlLMO2DGzQaWBxGzf4vhPL6bOY+hLneNQsnXMK/asmhxMhSp9+i
  +
GBTX1p+qOKnE+WHWyOyH0nPpR1goA02ZGcVx8KWssHoOSA7yKi6/rY0CoVeHiWFY
  +
LIWB2hLVDCICRRGCBcFWptrYy9/RT8odcjnCqfUds0r7i7ZdHf+njXVQukzLt0sV
  +
A6PdYdR9wS8FCNUbi/eqcsH+B6NU4oeiAkcHUw12upPNKRfaSoravkWJa2WkRHNF
  +
-----END RSA PRIVATE KEY-----
  +
</pre>
  +
  +
== Utility Servers ==
  +
{|
  +
! style="text-align:left;"| Service
  +
! IP address
  +
|-
  +
|ipssys01.webhuis.nl
  +
|10.168.0.1
  +
|-
  +
|cfeutl01.webhuis.nl
  +
|10.168.0.10
  +
|-
  +
|aptutl01.webhuis.nl
  +
|10.168.0.11
  +
|-
  +
|nfsutl01.webhuis.nl
  +
|10.168.0.12
  +
|}
  +
  +
== Local Mirrors ==
  +
{|
  +
! style="text-align:left;"| OS
  +
! Mirror
  +
! IP address
  +
|-
  +
|Debian
  +
|aptutl01.webhuis.nl
  +
|10.168.0.11
  +
|-
  +
|Centos 7
  +
|rpmcos01.webhuis.nl
  +
|10.168.0.22
  +
|-
  +
|OpenSuse
  +
|
  +
|
  +
|-
  +
|Ubuntu 14.04
  +
|aptubu01.webhuis.nl
  +
|10.168.0.21
  +
|}
  +
  +
== Supported Platforms ==
  +
As of November 2014 the focus has been on integration of The CFEngine Roadshow with the official Masterfiles at the expense of the expansion of platform support. We now have integrated Masterfiles and now really are ready to extend platform support. We feel Android and Rasberry Pi support are the greater challenges, wheras Ubuntu, Centos, opensuse, Gentoo and Mint support are very useful.
  +
* Debian
  +
* Centos / Fedora
  +
* Suse
  +
* Ubuntu
  +
Please file a request if you do not find your preferred platform.
  +
=== Images ===
  +
With efficient use of bandwidth in mind the preferred method of installation is a netinstall, we assume x86_64. The CFEngine Roadshow uses local mirrors and needs no external connection in order to be able to install and configure guest VM's.
  +
{|
  +
! style="text-align:left;"| OS
  +
! Images
  +
|-
  +
|Debian
  +
|http://ftp.nl.debian.org/debian/dists/wheezy/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
  +
|-
  +
|
  +
|http://ftp.nl.debian.org/debian/dists/wheezy/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
  +
|-
  +
|Centos
  +
|
  +
|-
  +
|Fedora
  +
|
  +
|-
  +
|OpenSuse
  +
|
  +
|-
  +
|Ubuntu
  +
|
  +
|}
  +
  +
=== CFEngine Community ===
  +
Please install CFEngine 3.6.2-1 for your installation method of choice. The CFEngine Debian-team are proud to announce cfengine3-3.6.2 made it Debian Jessie. CFEngine has an important bug fix release 3.6.3, we will incorporate this release as soon as possible. The CFEngine Roadshow so far for practical reasons still uses the release issued by cfengine.com.
  +
{|
  +
! style="text-align:left;"| OS
  +
! Package
  +
|-
  +
|Debian CFEngine build
  +
|http://cfengine.package-repos.s3.amazonaws.com/community_binaries/cfengine-community_3.6.2-1_amd64.deb
  +
|-
  +
|Debian Debian-team
  +
|<b>Preferred, extra reward: https://github.com/Webhuis/Cfengine-debian
  +
|-
  +
|RPM based
  +
|http://cfengine.package-repos.s3.amazonaws.com/community_binaries/cfengine-community-3.6.2-1.x86_64.rpm
  +
|}
  +
Please keep in mind you have to wait for The CFEngine Roadshow to be available before you bootstrap your VM.
  +
 
=== Naming convention ===
  
=== Naming convention ===
−
We use a naming convention in order to determine the role of a node.
 +
We use a naming convention in order to determine the role of a node*.
   
 
{|
  
{|
Line 11: Line 185:
 
|-
  
|-
 
|apt_cacher
  
|apt_cacher
  +
|aptutl
−
|apt
  
  +
|-
  +
|cfe_hub
  +
|cfeutl
 
|-
  
|-
 
|ips_server
  
|ips_server
Line 17: Line 194:
 
|-
  
|-
 
|nfs_server
  
|nfs_server
  +
|nfsutl
−
|nfs
  
 
|-
  
|-
−
!webapp_server
 +
|webapp_server supporting the Tomcat sample app
 
|webapp
  
|webapp
  +
|-
  +
|webttw_server supporting the Tomcat testweb app
  +
|webttw
  +
|-
  +
|webhud_server supporting the Tomcat Hudson app
  +
|webhud
 
|}
  
|}
  +
* Check this before you use the node, the mnemonics may change.<br/>
  +
Use the last two octets of your Mac Address after the mnemonic as a unique identifier for your hostname. Please use the hexadecimal representation of these octests.<br/><br/>
 
You can always check the CFEngine code that manages the role of the server here:
  
You can always check the CFEngine code that manages the role of the server here:
 
[https://github.com/Webhuis/CFEngine-Roadshow/blob/master/services.cf The CFEngine Node Role]
  
[https://github.com/Webhuis/CFEngine-Roadshow/blob/master/services.cf The CFEngine Node Role]
   
−
== CFEngine package ==
 +
== The CFEngine Debian-team package ==
−
Please install CFEngine 3.6.2 for your distribution of choice.<br/>
  
 
Debian users are encouraged to build their own package from:
  
Debian users are encouraged to build their own package from:
 
[https://github.com/Webhuis/Cfengine-debian Debian-team]
  
[https://github.com/Webhuis/Cfengine-debian Debian-team]
 
Instructions can be found here:
  
Instructions can be found here:
 
[https://github.com/Webhuis/Cfengine-debian/wiki Debian-team Wiki]
  
[https://github.com/Webhuis/Cfengine-debian/wiki Debian-team Wiki]
  +
The CFEngine Debian-team is a community initiative to make available to the community a Debian standards compliant CFEngine-Community package. Jessie is near and we are determined to bring the up to date CFEngine-Community 3.6.2 to this version of Debian. One of the major spin off of the project is that the methods we developed are applicable to other distributions too, so we will rename our initiative to the CFEngine Packaging-team.
  +
   
−
== Supported Platforms ==
  
−
* Debian
  
−
* RHEL
  
−
* Suse
  
−
Please file a request if you do not find your preferred platform.
  
 
<hr>
  
<hr>
−
Return to: [[Cfengine]]
 +
Return to: [[CFEngine]]

Latest revision as of 15:01, 1 June 2022

Webhuis facilitates and encourages attendees to The CFEngine Roadshow to configure a blank VM of choice. We are in the process of supporting as many platforms as possible. We do have full support for debian_7 and debian_8 and partly ubuntu_14. We are working and in need of support for centos_*. We are working on opensuse_13. Mint, Gentoo, Raspberry Pi and Androids geeks are more than welcome.

Pre requisities

Fair use policy

Every individual who is using the facilities of The CFEngine Roadshow states he or she complies with the following:

  1. Will follow the instuctions given during The CFEngine Roadshow
  2. Will not disturb The CFEngine Roadshow by any kind of attacks to any of the The CFEngine Roadshow systems, it is a live demonstration not a Cracker Camp
  3. Will not copy Commercial Software to any of the common CFEngine Roadshow utility systems
  4. Will report if the number of bootstrapped agents exceeds the count of ten, in order to receive an award

Happy bootstrapping!

Create a blank Virtual Machine

Please have your bare Virtual Machine ready before you take part in The CFEngine Roadshow. Please install a bare machine and make it as lean as possible. You even do not need to install ssh, we probably replace it anyway, just use VNC.
We assume a KVM VM. Good descriptions for are avaiable here virt-install. Example code: 

# qemu-img create -f qcow2 /data/centos-6.4.qcow2 10G
# virt-install --virt-type kvm --name centos-6.4 --ram 1024 \
--cdrom=/data/CentOS-6.4-x86_64-netinstall.iso \
--disk path=/data/centos-6.4.qcow2,size=10,format=qcow2 \
--network network=default\
--graphics vnc,listen=0.0.0.0 --noautoconsole \
--os-type=linux --os-variant=rhel6

Centos 7

Netinstall CentOS-7.0-1406-x86_64-NetInstall.iso

CFEngine Roadshow Services

The CFEngine Roadshow offers services to support the creation and configuration of Nodes.

Private key cfetest

It is recommended to create a cfetest user on your preferred machine and have the enclosed private key available in the .ssh directory. Then create the file id_rsa with permissions 700 and copy the key content into the file. The passphrase of the key is CFEngine_Roadshow. 

-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-128-CBC,A5D6E322AA20CF2FC2B1FBCB9A86AF57

+tgxD1apbr5OoxVXoIrSaF3Q3HyRcacnV4mliVB9NQ2xns4fwfF12R3wH0+8aJMn
PLNcmBER9iSdvQvm9ZbNEifzhdkRp08lPK6j2e2A/Rn4ksYXdfXZw7l6G7T+w8Yo
zIUIvOg85vGOhH6VZ4tlYhMy3Mq4i4RAXbstAgxq3GI+eFqohzVxUE/+ZbgJ8twh
dh2jyAP2KQzKbGFybM1l9iqQPYXRQPyC7wRskl75Eqs7kwAcPfgVoJA2YLue4meh
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I/wbGYPJJ1OF2KY6qlo1qSi5vEKR3fbKsrJD9l+4YBCHaSy9FP2IkkjpAiH++NMS
K35HhMinqAXU0lUKdHWSeJ1SDULkz0hdAaLe7xoXgw3/0xbBxE8+fKab85cKgS13
dG0ckHCrCsjtTXoXXq/6eaCFvHM5V6PXXkZtLp6OkD+VK4wm81em5pHYQbN9yfq0
vS6CMTqKVC3CyQ1lD6QMHaJxbpkbyM/U1jXVxqZTfRgFg8f9VQphYAmhsf8VOSBt
WGEbxEqZBmm5udixfP3c4bOk40O1tsH5pNC+5pT+Hb0cnQ7g4ZQAs0alhNzOyp2+
z4T/lzsQzeDO5hkc3A6U3pkPmj859BNKEUhMjX4Mv8W+2OSIpNadckpivvzsoKOi
aQsKS3oo7Dls5h0CB67xkW/UIpMov6ySfDGYqqc6Ccj1hdqgnKj7uzUoCLY5I5/i
1dEbYvRrM81AMU6o1+N6+DtdtVnVElVErzUOXC8G8BO3gaWIojKmhbc7H1jhDcQ/
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-----END RSA PRIVATE KEY-----

Utility Servers

Service IP address
ipssys01.webhuis.nl 10.168.0.1
cfeutl01.webhuis.nl 10.168.0.10
aptutl01.webhuis.nl 10.168.0.11
nfsutl01.webhuis.nl 10.168.0.12

Local Mirrors

OS Mirror IP address
Debian aptutl01.webhuis.nl 10.168.0.11
Centos 7 rpmcos01.webhuis.nl 10.168.0.22
OpenSuse
Ubuntu 14.04 aptubu01.webhuis.nl 10.168.0.21

Supported Platforms

As of November 2014 the focus has been on integration of The CFEngine Roadshow with the official Masterfiles at the expense of the expansion of platform support. We now have integrated Masterfiles and now really are ready to extend platform support. We feel Android and Rasberry Pi support are the greater challenges, wheras Ubuntu, Centos, opensuse, Gentoo and Mint support are very useful.

  • Debian
  • Centos / Fedora
  • Suse
  • Ubuntu

Please file a request if you do not find your preferred platform.

Images

With efficient use of bandwidth in mind the preferred method of installation is a netinstall, we assume x86_64. The CFEngine Roadshow uses local mirrors and needs no external connection in order to be able to install and configure guest VM's.

OS Images
Debian http://ftp.nl.debian.org/debian/dists/wheezy/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
http://ftp.nl.debian.org/debian/dists/wheezy/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
Centos
Fedora
OpenSuse
Ubuntu

CFEngine Community

Please install CFEngine 3.6.2-1 for your installation method of choice. The CFEngine Debian-team are proud to announce cfengine3-3.6.2 made it Debian Jessie. CFEngine has an important bug fix release 3.6.3, we will incorporate this release as soon as possible. The CFEngine Roadshow so far for practical reasons still uses the release issued by cfengine.com.

OS Package
Debian CFEngine build http://cfengine.package-repos.s3.amazonaws.com/community_binaries/cfengine-community_3.6.2-1_amd64.deb
Debian Debian-team Preferred, extra reward: https://github.com/Webhuis/Cfengine-debian
RPM based http://cfengine.package-repos.s3.amazonaws.com/community_binaries/cfengine-community-3.6.2-1.x86_64.rpm

Please keep in mind you have to wait for The CFEngine Roadshow to be available before you bootstrap your VM.

Naming convention

We use a naming convention in order to determine the role of a node*.

Role Mnemonic
apt_cacher aptutl
cfe_hub cfeutl
ips_server ips
nfs_server nfsutl
webapp_server supporting the Tomcat sample app webapp
webttw_server supporting the Tomcat testweb app webttw
webhud_server supporting the Tomcat Hudson app webhud
  • Check this before you use the node, the mnemonics may change.

Use the last two octets of your Mac Address after the mnemonic as a unique identifier for your hostname. Please use the hexadecimal representation of these octests.

You can always check the CFEngine code that manages the role of the server here: 

The CFEngine Node Role

The CFEngine Debian-team package

Debian users are encouraged to build their own package from: 

Debian-team

Instructions can be found here: 

Debian-team Wiki

The CFEngine Debian-team is a community initiative to make available to the community a Debian standards compliant CFEngine-Community package. Jessie is near and we are determined to bring the up to date CFEngine-Community 3.6.2 to this version of Debian. One of the major spin off of the project is that the methods we developed are applicable to other distributions too, so we will rename our initiative to the CFEngine Packaging-team.


Return to: CFEngine

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