Bug 1733608

Summary: RHOSP 15 Beta Standalone Installation Fails Due to Missing /usr/bin/python
Product: Red Hat OpenStack Reporter: Luke Short <lshort>
Component: openstack-tripleo-heat-templatesAssignee: Luke Short <lshort>
Status: CLOSED ERRATA QA Contact: Alexander Chuzhoy <sasha>
Severity: medium Docs Contact:
Priority: medium    
Version: 15.0 (Stein)CC: aschultz, emacchi, jschluet, mburns, slinaber
Target Milestone: gaKeywords: Triaged
Target Release: 15.0 (Stein)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: openstack-tripleo-heat-templates-10.6.1-0.20190828180441.8dc2faf.el8ost Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-09-21 11:24:01 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
Standalone deployment errors none

Description Luke Short 2019-07-26 18:30:08 UTC 
Created attachment 1593774 [details]
Standalone deployment errors

Description of problem:
During one of the last few tasks of Step 5 of the deployment, it fails because Ansible cannot find a Python interpreter to use. Python is available at /usr/bin/python2, /urs/bin/python3, and /usr/libexec/platform-python. No package provide /usr/bin/python. I had to manually symlink /usr/bin/python3 to /usr/bin/python to get the installation to finish.

Version-Release number of selected component (if applicable):
RHOSP 15 Beta, RHEL 8.0, Ansible 2.8.2

How reproducible:
100%

Steps to Reproduce:
1. Follow the RHOSP 15 Beta Quickstart guide to install a standalone cloud. https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/15-beta/html/quick_start_guide/index
2. Use the RHOSP 15 Beta container registry
```
---
parameter_defaults:
  ContainerImagePrepare:
  - set:
      namespace: registry.redhat.io/rhosp-beta
      tag: 15.0
```

Actual results:
Ansible complains with this error:
"""
The following modules failed to execute: setup\\\\\\\\n  setup: The module failed to execute correctly, you probably need to set the interpreter.
"""

Expected results:
Deployment successful!

Additional info:
Ansible 2.8 *should* have automatically detected and found a Python interpreter on RHEL 8.

Packages installed:
```
$ rpm -qa | grep -P "ansible|tripleo"
ansible-2.8.2-1.el8ae.noarch
openstack-tripleo-puppet-elements-10.3.1-0.20190614132452.79c0c76.el8ost.noarch
ansible-role-chrony-0.0.1-0.20190423220429.494f3c4.el8ost.noarch
openstack-tripleo-heat-templates-10.6.1-0.20190713150434.2871ce0.el8ost.noarch
ansible-tripleo-ipsec-9.1.1-0.20190513190404.ffe104c.el8ost.noarch
openstack-tripleo-validations-10.4.1-0.20190701170405.10b4d77.el8ost.noarch
ansible-role-tripleo-modify-image-1.0.1-0.20190621160359.1415b04.el8ost.noarch
python3-tripleoclient-heat-installer-11.4.1-0.20190705110410.14ae053.el8ost.noarch
puppet-tripleo-10.4.2-0.20190701160408.ecbec17.el8ost.noarch
openstack-tripleo-image-elements-10.4.1-0.20190604170406.2c8a6a5.el8ost.noarch
ansible-role-container-registry-1.1.1-0.20190711170430.1217799.el8ost.noarch
python3-heat-agent-ansible-1.8.1-0.20190523210450.1e15344.el8ost.noarch
openstack-tripleo-common-10.8.1-0.20190710191707.b6a2d65.el8ost.noarch
python3-tripleoclient-11.4.1-0.20190705110410.14ae053.el8ost.noarch
python3-tripleo-common-10.8.1-0.20190710191707.b6a2d65.el8ost.noarch
ansible-role-redhat-subscription-1.0.4-0.20190701140422.fceb51c.el8ost.noarch
ansible-role-thales-hsm-0.2.1-0.20190422121359.9019dde.el8ost.noarch
openstack-tripleo-common-containers-10.8.1-0.20190710191707.b6a2d65.el8ost.noarch
ansible-pacemaker-1.0.4-0.20190418190349.0e4d7c0.el8ost.noarch
ansible-role-atos-hsm-0.1.1-0.20190422121159.1518dbd.el8ost.noarch
```
Comment 1 Luke Short 2019-07-29 14:43:01 UTC 
The standalone post configuration uses /usr/bin/python as the Ansible interpreter for a single task that creates a symlink.

https://github.com/openstack/tripleo-heat-templates/blob/577640a9c9659bb1d5b393e9bd616ef4b32b6f12/extraconfig/post_deploy/standalone_post.yaml#L31
https://github.com/openstack/tripleo-heat-templates/blob/577640a9c9659bb1d5b393e9bd616ef4b32b6f12/extraconfig/post_deploy/standalone_post.yaml#L40

For a normal Undercloud, that symlink is created by a single command via a shell script.

https://github.com/openstack/tripleo-heat-templates/blob/577640a9c9659bb1d5b393e9bd616ef4b32b6f12/extraconfig/post_deploy/undercloud_post.sh#L4
Comment 2 Alex Schultz 2019-07-29 14:54:33 UTC 
In the undercloud[0] we actually set PythonInterpreter to sys.excutable. I think this is an issue with the rhel8 bits where we need to document that this be set for the undercloud

https://opendev.org/openstack/python-tripleoclient/src/branch/master/tripleoclient/v1/undercloud_config.py#L393
Comment 7 errata-xmlrpc 2019-09-21 11:24:01 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2019:2811