I wanted to do an uninstallation of OMS agent in our Linux machines. Unfortunately, we do have different OMS agent versions assigned to each machine. I hard coded the version from my Ansible script
command: sudo {{ file_path }}/omsagent-1.13.9-0.universal.x64.sh —-purge
It only works for machine with that same OMS agent version else, it will fail.
I tried adding wildcard syntax, but it is getting an error stating that command not found
stderr: “sudo :/home/filename/omsagent-* : command not found
if I changed my previous command to
command: sudo {{file_path}}/omsagent-*.universal.x64.sh —-purge
Since I do not have this specific agent in place, I can't provide a full tested working example, but some some guidance.
According the package documentation and All bundle operations, the bundle has an option for
--version-check Check versions already installed to see if upgradable.
which should provide the installed version. Furthermore any installed agent has an directory with service control script
/opt/microsoft/omsagent/bin/service_control ...
and probably others, like scxadmin --version. By executing one or the other it should be possible to gather the correct installed version of the agent.
- name: Gather installed OMS agent version
become: true
become_method: sudo
shell:
cmd: /opt/microsoft/omsagent/bin/service_control status | grep <whatever is necessary to get the version string only>
register: VERSION
changed_when: false
check_mode: false
Please take note that instead of using sudo within the command, you should use become. Since it is a version reporting task only, you should also use changed_when and check_mode.
After the correct version is gathered you use it like
- name: Purge installed OMS agent version
become: true
become_method: sudo
shell:
cmd: "omsagent-{{ VERSION }}.universal.x64.sh —-purge"
Is there any reason why the option --upgrade or --force can`t be used?
You may also have a look into How to troubleshoot issues with the Log Analytics agent for Linux, there is a standalone versionless purge script available.
Related
In an ansible (ver. 2.10) playbook I would need to invoke the dpkg-reconfigure openssh-server command to recreate SSH server keys.
- name: Create new SSH host's keys
shell: dpkg-reconfigure openssh-server
notify: restart sshd
The problem is that dpkg-reconfigure openssh-server opens a dialog box, and the script get stucked...
Looking into ansible documentation, it seems that dpkg-reconfigure can be managed by debconf module:
Code example related to locales module:
- name: Set default locale to fr_FR.UTF-8
debconf:
name: locales
question: locales/default_environment_locale
value: fr_FR.UTF-8
vtype: select
The question from openssh-server debconf module is: What do you want to do about modified configuration file sshd_config? and the answer would be: keep the local version currently installed.
How could I manage it using ansible debconf module?
This is not a debconf issue. The file is marked as a config file by Debian packaging and dpkg is handling it at a generic level. dpkg --configure has --force-confold but dpkg-reconfigure does not.
https://wiki.debian.org/ConfigPackages may also be useful.
TL;DR; Yes, use Ansible debconf but mv /var/lib/dpkg/info/<package>.config file aside whilst reconfiguring.
The rest of this is for others searching for insight into debconf and Ansible's debconf module.
I spent some time digging into this and have submitted some docs to the Ansible debconf module which I've edited a bit for this answer.
Reconfiguring packages in Debian using debconf is not straightforward!
The Ansible debconf module does not reconfigure packages, it just updates the debconf database. An additional playbook step is needed (typically via notify if debconf makes a change) to reconfigure the package and apply the changes.
Now debconf is primarily used for pre-seeding configuration prior to installation.
So, whilst dpkg-reconfigure does use debconf data, it is not always authoritative and you may need to check how your package is handled.
dpkg-reconfigure is a 3-phase process. It invokes the control scripts from the /var/lib/dpkg/info directory with the following arguments:
<package>.prerm reconfigure <version>
<package>.config reconfigure <version>
<package>.postinst control <version>
The main issue is that the <package>.config reconfigure step for many packages will first reset the debconf database (overriding changes made by the Ansible module) by checking the on-disk configuration. If this is the case for your package then dpkg-reconfigure will effectively ignore changes made by this debconf module.
However although dpkg-reconfigure finally invokes:
/var/lib/dpkg/info/<package>.postinst configure <version>
to actually configure the package; using this turns out not to be that simple. The script is expected to be run from a "debconf frontend" and uses IPC to respond to the _db_cmd statements in the script.
To see this in more detail
export DPKG_MAINTSCRIPT_PACKAGE=<package>
export DPKG_MAINTSCRIPT_NAME=<script path>
export DEBIAN_HAS_FRONTEND=1
and run the script. I was trying to setup unattended-upgrades so I ran:
sh -x /var/lib/dpkg/info/unattended-upgrades.postinst configure 1.11.2
This then halts waiting for a response from the frontend.
Running
/usr/share/debconf/frontend /var/lib/dpkg/info/unattended-upgrades.postinst configure 1.11.2
works... but has the exact same problem as dpkg-reconfigure - it resets the debconf database :(
This is because running
/var/lib/dpkg/info/unattended-upgrades.postinst configure 1.11.2
sources /usr/share/debconf/confmodule which exec()s /usr/share/debconf/frontend which forces the <package>.config configure phase to take place.
This is done based on the existence (ie using shell [-e]) of the .config file and cannot be avoided.
The solution is to mv /var/lib/dpkg/info/<package>.config out of the way whilst dpkg-reconfigure (or other related debconf code) runs.
Note the Debian programmers manual says that the config script's sole purpose is to populate debconf and must not affect other files; so doing this in a playbook is (to my understanding) compliant with debian policy: http://www.fifi.org/doc/debconf-doc/tutorial.html#AEN113
HTH
I also had this problem and I want to share my workaround.
In my case, I want non-root users to be able to sniff network traffic with wireshark/tshark. The package in question is wireshark-common which I normally reconfigure to modify dumpcap as setuid.
In my playbook, I do the following. First, use debconf to modify the config and than run the dpkg-reconfigure command in non-interactive mode, but only if the config has changed.
- name: wireshark setuid
ansible.builtin.debconf:
name: wireshark-common
question: wireshark-common/install-setuid
value: yes
vtype: boolean
register: reconfigure_changed
- name: make debconf changes active
ansible.builtin.command:
cmd: "dpkg-reconfigure wireshark-common"
environment:
DEBIAN_FRONTEND: noninteractive
when: reconfigure_changed.changed
Hope this is helpful.
I am looking myself for a solution but I haven't found one yet to achieve that with debconf and ansible.
The Problem is, debconf has no "selection" in terms of sshd_config.
When you look for debconf and preseed (Debian unattended installation) there is simply no Argument where you can specify to keep the current sshd_config.
for example active debconf settings:
sudo debconf-show openssh-server
openssh-server/permit-root-login: false
openssh-server/password-authentication: false
These are the questions for the ansible debconf module.
what we are looking for, but thats not possible:
- debconf:
name: openssh-server
question: openssh-server/keep-current-sshd-config
value: true
Unfortunately, we have to find a workaround.
For my case, I wanted to reconfigure openssh-server on my raspberry pi's
Luckily, there is a systemd file on raspbian OS /lib/systemd/system/regenerate_ssh_host_keys.service that does what the name says.
To make use of it, just delete the ssh_host_* files and reboot the machine.
If you need to get that for different hosts, you need to find another workaround. Maybe importing new ssh_host key files via ansible, or build a small script.
I have a problem with my ansible playbook. Normally i use the console to upgrade a program.
After the dependency check i have to answer with yes. I checked the Shell documentation,
Now i scripted that with Ansible, and the task is pending because no user can do an interaction.
As example this is the part of my testplaybook which is not working.
# Uninstall tree
- name: uninstall
shell: yum remove tree
My question is now how can i submit a decision, as example yes or no in my playbook.
ps: I know i can set the yum module to the state: absent but this is basd on the yum module.
pps: No i do not want to send the -y paramenter in the shell. This does not solve all my problems
For Yum, use the Yum module: https://docs.ansible.com/ansible/latest/modules/yum_module.html
However, your answer can be found here: https://docs.ansible.com/ansible/latest/modules/expect_module.html
I have been trying to run the command
brew services restart nrpe
with the help of Ansible's homebrew module.
I have gone through the documentation (homebrew ansible doc) but I couldn't find an example which does a similar thing. I have tried the following:
- homebrew:
name: nrpe
state: present
install_options: services,restart
but it didn't work. Please let me know the correct way to run the command
brew services restart nrpe.
P.S. - Installation of nrpe or other services though homebrew is working great.
Edit 1 - Also including the Nagios tag because this might also be faced by the nagios community.
According to the documentation of the homebrew ansible module, the command :
brew services restart nrpe
seems not implemented. The solution could be to use the command module:
- name: restart the nrpe service
command: brew services restart nrpe
Is there a simple way how to get back what precisely ansible script(playbook) is trying to do?
E.g. I have
- name: Install required packages
yum: name={{item}} state=present
with_items:
- nmp
become: True
And I want to get:
sudo yum install nmp
That said, I want to know what commands (OS level) ansible is running.
Basically, I need the reverse process to: Ansible and Playbook. How to convert shell commands into yaml syntax?
Summarizing here the central points from comments above [1][2].
Ansible rarely runs external commands, it's mostly Python code & Python libraries being used to control hosts. Therefor, Ansible's "translation" isn't necessarily converting yum (Ansible module) usage into yum (CLI) invocations.
While you may be able to depend on the output, in some cases, by parsing for command sequences in the output of ansible-playbook -vvv foo.yml - the implementation would be flaky at best.
I'd encourage you to keep discussing on this thread what you're trying to accomplish. It's likely there is already a solution, and someone can point you to a tool that already exists.
I'm in the process of converting a manual server provisioning process into a Ansible playbook. Part of the process involves installing WebSphere MQ client. One step involves manually running a script, mqlicense.sh, and accepting a licensing agreement in response to a prompt. How can I accomplish this in Ansible?
If I run the script, the ansible process hangs. If I skip that step, I get the following error:
ERROR: Product cannot be installed until the license
agreement has been accepted.
Run the 'mqlicense' script, which is in the root
directory of the install media, or see the
Quick Beginnings book for more information.
Update
Further Googling brought me to this ibm.com page, where it states:
If want to accept the license without it being displayed, you can run
the mqlicense.sh script with the -accept option.
./mqlicense.sh -accept
However, that does not seem to work in my case. When I run that command from the command line, the interactive prompt still comes up.
The issue turned out to be with the mqlicense.sh script. Apparently, it uses some syntax incompatible with bash. So when I ran it on my Debian server, the script complained:
./mqlicense.sh: 99: ./mqlicense.sh: [[: not found
The solution, alluded to in this ibm.com forum thread, was to install the korn shell (ksh), and use that to accept the license. The following tasks were included in my playbook:
Include ksh with system packages:
- name: Install debian packages
apt: pkg=${item} state=installed
with_items:
- alien
- ksh
Call the script using ksh:
# Need to run this with ksh; script syntax is not bash-compliant
- name: Accept MQ Client license
command: ksh mqlicense.sh -accept chdir=${vsphere_wd}
Ansible playbook can be found here:
https://gist.github.com/klenwell/cdf2dc92ddfe2e7e18fc