Are you trying to resolve 'Error: Function lookup() did not find a value for the name DEFAULT_EXEC_TIMEOUT' ?

We can help you.

Sometimes our customers report to us that they get this error while trying to install OpenStack using packstack.
Packstack is a utility that uses Puppet modules to provide an easy way to deploy an OpenStack Platform environment on one or several machines. However, we may end up with the above error at times while using packstack. And this can be due to any issue with repositories we use.
Here at Ibmi Media, as part of our Server Management Services, we regularly help our Customers to resolve related OpenStack errors.

When do we get Error: Function lookup() did not find a value for the name DEFAULT_EXEC_TIMEOUT ?

We may get this error while trying to install the latest version of OpenStack using packstack.
Using the following commands we can reproduce the error:

sudo dnf install network-scripts -y

sudo systemctl disable firewalld

sudo systemctl stop firewalld

sudo systemctl disable NetworkManager

sudo systemctl stop NetworkManager

sudo systemctl enable network

sudo systemctl start network

sudo dnf update -y

sudo dnf config-manager --enable PowerTools

sudo dnf install -y centos-release-openstack-ussuri

sudo dnf update -y

sudo dnf install -y openstack-packstack

sudo packstack --allinone

Following is the actual result we may get:

Preparing Neutron DHCP Agent entries [ DONE ]

Preparing Neutron Metering Agent entries [ DONE ]

Checking if NetworkManager is enabled and running [ DONE ]

Preparing OpenStack Client entries [ DONE ]

Preparing Horizon entries [ DONE ]

Preparing Swift builder entries [ DONE ]

Preparing Swift proxy entries [ DONE ]

Preparing Swift storage entries [ DONE ]

Preparing Gnocchi entries [ DONE ]

Preparing Redis entries [ DONE ]

Preparing Ceilometer entries [ DONE ]

Preparing Aodh entries [ DONE ]

Preparing Puppet manifests [ DONE ]

Copying Puppet modules and manifests [ DONE ]

Applying 10.20.253.31_controller.pp

10.20.253.31_controller.pp: [ ERROR ]

Applying Puppet manifests [ ERROR ]

ERROR : Error appeared during Puppet run: 10.20.253.31_controller.pp

Error: Function lookup() did not find a value for the name 'DEFAULT_EXEC_TIMEOUT'

What triggers this error ?

The epel repo being enabled causes this error usually. At times the version of puppet in ussuri repo will be 6.14.0. but the installation may have 6.17.0.
We can check the version using the following command depending upon the operating system we use:

[root@openstack ~]# cat /etc/redhat-release

CentOS Linux release 8.2.2004 (Core)

[root@openstack ~]# arch

x86_64

[root@openstack ~]# puppet --version

6.17.0

[root@openstack ~]# hiera --version

3.6.0

Furthermore, installing packages from any unsupported repo can be a reason for this.
Next, we will see the steps we followed to fix this issue for our customers.

How to resolve this error ?

Firstly we need to ensure that epel repo is disabled and try to install Openstack again.
So we need to uninstall it and all the dependencies first and reinstall it after disabling epel.
This can be done with the following commands:

# yum autoremove epel-release

# yum autoremove openstack-packstack

# yum clean all

# yum install -y openstack-packstack

Once we do this we will have all the proper versions of dependencies.
As a result, we will not get the above error while trying to install OpenStack with packstack.

[Need assistance in fixing Linux related errors? We can help you. ]