question Re: /usr/bin/env: ambari-python-wrap: No such file or directory in Support Questions

/usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 06:47:36 GMT

Dear Community,

I am trying to install an ambari cluster using Use Public Repository.

I have already configured the Password Less on all the servers and I could connect from ambari node to the others using ssh root@node1,2...

I copied the right ssh private key however the confirmation of hosts failed with:

Error while bootstrapping:
/usr/bin/env: ambari-python-wrap: No such file or directory

I could not find any ambari-agent folder , should I have? I did not install agent manually ..

Please help

Thanks and Regards

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

jsensharma — Wed, 13 Nov 2019 05:19:57 GMT

@asmarz
Try reinstalling Ambari Agent Binaries once.

Ideally there should be a Symlink created as following when you successfully install Ambari Agent Binary to a host. The symlink points to a Python binary installed on that host.

Example:

# ls -lart /usr/bin/ambari-python-wrap lrwxrwxrwx. 1 root root 15 Feb 15 2019 /usr/bin/ambari-python-wrap -> /usr/bin/python

Try reinstalling ambari agent.

# which python # ls -l /usr/bin/python # /usr/bin/python -V # yum reinstall ambari-agent # ls -lart /usr/bin/ambari-python-wrap

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 09:06:59 GMT

[root@luapp698 bin]# ls -l /usr/bin/python
lrwxrwxrwx. 1 root root 7 Nov 7 13:41 /usr/bin/python -> python2

[root@luapp698 bin]# /usr/bin/python -V
Python 2.7.5

[root@luapp698 bin]# ls -lart /usr/bin/ambari-python-wrap
ls: cannot access /usr/bin/ambari-python-wrap: No such file or directory

I have reinstall the agent but i have the same issue 😞

Thanks

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

jsensharma — Wed, 13 Nov 2019 09:18:19 GMT

@asmarz

On the Ambari Agent host where you are observing this issue please try this.

You will find a file like following "/var/lib/ambari-agent/tmp/create-python-wrap.sh". Can you please try to run that file manually as "root" user like?

# sh -x /var/lib/ambari-agent/tmp/create-python-wrap.sh

Above should create the mentioned symlink ... but if it does not work then please share the Full output of the above commend from the terminal as it is.

Once the above script is executed fine then please check if the link is created properly or not?

# ls -l /usr/bin//ambari-python-wrap

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 09:29:45 GMT

[root@luapp698 ambari-agent]# sh -x /var/lib/ambari-agent/tmp/create-python-wrap.sh
sh: /var/lib/ambari-agent/tmp/create-python-wrap.sh: No such file or directory
[root@luapp698 ambari-agent]# sudo su
[root@luapp698 ambari-agent]# ^C
[root@luapp698 ambari-agent]# cd /var/lib/ambari-agent/
[root@luapp698 ambari-agent]# ll
total 32
-rwxr-xr-x 1 root root 1116 Aug 22 02:11 ambari-env.sh
-rwxr-xr-x 1 root root 1345 Aug 22 02:11 ambari-sudo.sh
drwxr-xr-x 2 root root 26 Nov 13 10:05 bin
drwxr-xr-x 9 root root 179 Nov 13 10:05 cache
drwxr-xr-x 3 root root 17 Aug 22 02:12 cred
drwxr-xr-x 2 root root 21 Nov 13 10:05 data
-rwxr-xr-x 1 root root 8349 Aug 22 02:11 install-helper.sh
drwxr-xr-x 2 root root 6 Aug 22 02:11 keys
drwxr-xr-x 2 root root 6 Aug 22 02:11 lib
drwxr-xr-x 2 root root 6 Aug 22 02:11 tmp
drwxr-xr-x 2 root root 53 Nov 13 10:05 tools
-rwxr-xr-x 1 root root 2326 Aug 22 02:11 upgrade_agent_configs.py
-rwxr-xr-x 2 root root 2166 Aug 22 02:13 upgrade_agent_configs.pyc
-rwxr-xr-x 2 root root 2166 Aug 22 02:13 upgrade_agent_configs.pyo
[root@luapp698 ambari-agent]#

I have downloaded this

https://docs.cloudera.com/HDPDocuments/Ambari-2.7.4.0/administering-ambari/content/amb_download_the_ambari_repository_on_rhel-centos-oracle_linux_7.html

and installed like this

https://docs.cloudera.com/HDPDocuments/Ambari-2.7.4.0/administering-ambari/content/amb_download_the_ambari_repository_on_rhel-centos-oracle_linux_7.html

I think that the problem is deeper ..

Just as a supplement information, I have installed one ambari server in centos7 and multiple nodes, I have then tried to install ambari agent on ambari server and one of those node but the error is the same

I have set passwordless on all the nodes before installing agent, I could connect to all of nodes from the ambari using ssh, do I need even to install agents on all the nodes?

Thank you in advance

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 09:30:23 GMT

I have nothing under the /tmp directory

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

jsensharma — Wed, 13 Nov 2019 09:33:40 GMT

@asmarz

Can you try this once.

Copy the "/var/lib/ambari-server/create-python-wrap.sh" file from Ambari Server node and then Place it on the problematic Agent node at "/var/lib/ambari-agent/tmp/create-python-wrap.sh" and then again try to run the same command again and then verify if it creates the link?

# sh -x /var/lib/ambari-agent/tmp/create-python-wrap.sh

Also pleas verify if you are using correct ambari agent binary on the host?

# rpm -qa | grep ambari # grep ambari /var/log/yum.log

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 09:53:38 GMT

Hello

[root@luapp698 tmp]# rpm -qa | grep ambari
ambari-server-2.7.4.0-118.x86_64
ambari-agent-2.7.4.0-118.x86_64

[root@luapp698 tmp]# grep ambari /var/log/yum.log
Nov 08 14:55:40 Installed: ambari-server-2.7.4.0-118.x86_64
Nov 12 17:40:20 Installed: ambari-agent-2.7.4.0-118.x86_64
Nov 13 10:05:16 Installed: ambari-agent-2.7.4.0-118.x86_64

Now I am getting this error

==========================
Running create-python-wrap script...
==========================

Command start time 2019-11-13 10:43:52
bash: /var/lib/ambari-agent/tmp/ambari-sudo.sh: Permission denied

Connection to luapp698.lu.ema.ad.pwcinternal.com closed.
SSH command execution finished
host=luapp698.lu.ema.ad.pwcinternal.com, exitcode=126
Command end time 2019-11-13 10:43:52

ERROR: Bootstrap of host luapp698.lu.ema.ad.pwcinternal.com fails because previous action finished with non-zero exit code (126)
ERROR MESSAGE: Connection to luapp698.lu.ema.ad.pwcinternal.com closed.

STDOUT: bash: /var/lib/ambari-agent/tmp/ambari-sudo.sh: Permission denied

Connection to luapp698.lu.ema.ad.pwcinternal.com closed.

in SSH

[root@luapp698 tmp]# ll
total 16
drwxr-xr-x 6 root root 4096 Nov 13 10:43 ambari_commons
-rwx------ 1 root root 1345 Nov 13 10:43 ambari-sudo.sh
-rwxr-xr-x 1 root root 1577 Nov 13 10:43 create-python-wrap.sh
-rwxr-xr-x 1 root root 1558 Nov 13 10:43 os_check_type1573638232.py

What should be the issue please?

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

jsensharma — Wed, 13 Nov 2019 09:59:06 GMT

@asmarz
We see the sudoer error.

Command start time 2019-11-13 10:43:52 bash: /var/lib/ambari-agent/tmp/ambari-sudo.sh: Permission denied

So please make sure that Either you are running amabri agent as "root" user. You can verify it by looking at the following property:

# grep run_as /etc/ambari-agent/conf/ambari-agent.ini run_as_user=root

OR You have configured the Sudoer permissions properly as mentioned in the doc:
https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.4/securing-credentials/content/ambari_sec_how_to_configure_an_ambari_agent_for_non_root.html

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 10:09:11 GMT

yes it is the case

grep run_as /etc/ambari-agent/conf/ambari-agent.ini

run_as_user=root

and

[root@server tmp]# ambari-agent start
bash: /var/lib/ambari-agent/bin/ambari-agent: Permission denied

i am with a root user ..

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 10:35:51 GMT

on all servers i have this 😞

[root@luapp698 tmp]# grep run_as /etc/ambari-agent/conf/ambari-agent.ini
run_as_user=root
[root@luapp698 tmp]# ^C
[root@luapp698 tmp]# ambari-agent start
bash: /var/lib/ambari-agent/bin/ambari-agent: Permission denied

Re: /usr/bin/env: ambari-python-wrap: No such file or directory

asmarz — Wed, 13 Nov 2019 17:00:50 GMT

Should be the noexec ?