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Create yum variable, that is the result of a command?

Installing yum repositories that are specified in kickstart fileyum not working on EC2 Red Hat instance: Cannot retrieve repository metadatayum and command line fieldWhy must yum update its repos on each command?why does yum update fail in cent os 6.4 when wget and curl succeedsYUM, “patchlevel” and the DTAP street on redhat/centosIs it legal to create an RPM which only runs %post scripts to modify a file owned by another RPM?linux + yum update - what this command covers?redhat linux + yum updateinfo list + what is the equivalent command for redhat 5how does yum use the baseurl in the repo file?

1

To clarify, I am looking on how to store a yum variable as the RESULT of a command. The command I use to get the OS version is irrelevant to me, I'm sure there are better ways of getting it than what I've done below.

I want to create a custom yum variable that is the result of running

cat /etc/redhat-release | awk '{ print $3 }'

The documentation for creating variables seems to only allow for creating static variables inside a file in /etc/yum/vars/$variablename.

So what I want is to have /etc/yum/vars/dotrelease be the output of my command above, based on the system I am on.

Then I can set my baseurl repo to http://localrepo.com/repo/centos/$dotrelease/os/$basearch/

My custom repo is separated by dot release, where by default $releasever only looks the numbered release, for example, the $releasever variable on centos6.4 is "6".

I realize I can just

echo (cat /etc/redhat-release | awk '{ print $3 }') > /etc/yum/vars/dotrelease

but I'd have to run that on every machine I deploy, instead of just keeping the variable in a file.

linux centos redhat yum

share|improve this question

edited Aug 12 '14 at 0:27

Party Time

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

bumped to the homepage by Community♦ 6 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is a terrible way to go about it. It will return different and quite possibly wrong results on different systems. (I'm sure that you don't want "Enterprise" if you run it on an actual RHEL box.) Just use facter operatingsystemrelease.
  
  – Michael Hampton♦
  Aug 11 '14 at 23:51
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am trying to do this outside of puppet, and the result will always be the same on a redhat or cent box...
  
  – Party Time
  Aug 12 '14 at 0:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I didn't say anything about puppet. It's fairly common to use facter with ansible, for instance.
  
  – Michael Hampton♦
  Aug 12 '14 at 0:17
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So your suggestion is install facter, and store the yum variable as the output of 'facter operatingsystemrelease'? That is all well and good but doesn't answer the root of my question which is, how to create a yum variable that is the result of a command. The command to return the dot release of my os is irrelevant.
  
  – Party Time
  Aug 12 '14 at 0:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PartyTime How are you distributing the .repo file? Distribute one to your RHEL 6.2 servers and another to your 6.5 servers. Or you can build them dynamically, which is where the facter comes in handy. But is the software for EL6.2 considerably different than EL6.5?
  
  – ewwhite
  Aug 12 '14 at 0:47
  

  
  
  
  

 | 
show 1 more comment

1

To clarify, I am looking on how to store a yum variable as the RESULT of a command. The command I use to get the OS version is irrelevant to me, I'm sure there are better ways of getting it than what I've done below.

I want to create a custom yum variable that is the result of running

cat /etc/redhat-release | awk '{ print $3 }'

The documentation for creating variables seems to only allow for creating static variables inside a file in /etc/yum/vars/$variablename.

So what I want is to have /etc/yum/vars/dotrelease be the output of my command above, based on the system I am on.

Then I can set my baseurl repo to http://localrepo.com/repo/centos/$dotrelease/os/$basearch/

My custom repo is separated by dot release, where by default $releasever only looks the numbered release, for example, the $releasever variable on centos6.4 is "6".

I realize I can just

echo (cat /etc/redhat-release | awk '{ print $3 }') > /etc/yum/vars/dotrelease

but I'd have to run that on every machine I deploy, instead of just keeping the variable in a file.

linux centos redhat yum

share|improve this question

edited Aug 12 '14 at 0:27

Party Time

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

bumped to the homepage by Community♦ 6 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is a terrible way to go about it. It will return different and quite possibly wrong results on different systems. (I'm sure that you don't want "Enterprise" if you run it on an actual RHEL box.) Just use facter operatingsystemrelease.
  
  – Michael Hampton♦
  Aug 11 '14 at 23:51
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am trying to do this outside of puppet, and the result will always be the same on a redhat or cent box...
  
  – Party Time
  Aug 12 '14 at 0:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I didn't say anything about puppet. It's fairly common to use facter with ansible, for instance.
  
  – Michael Hampton♦
  Aug 12 '14 at 0:17
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So your suggestion is install facter, and store the yum variable as the output of 'facter operatingsystemrelease'? That is all well and good but doesn't answer the root of my question which is, how to create a yum variable that is the result of a command. The command to return the dot release of my os is irrelevant.
  
  – Party Time
  Aug 12 '14 at 0:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PartyTime How are you distributing the .repo file? Distribute one to your RHEL 6.2 servers and another to your 6.5 servers. Or you can build them dynamically, which is where the facter comes in handy. But is the software for EL6.2 considerably different than EL6.5?
  
  – ewwhite
  Aug 12 '14 at 0:47
  

  
  
  
  

 | 
show 1 more comment

To clarify, I am looking on how to store a yum variable as the RESULT of a command. The command I use to get the OS version is irrelevant to me, I'm sure there are better ways of getting it than what I've done below.

I want to create a custom yum variable that is the result of running

cat /etc/redhat-release | awk '{ print $3 }'

The documentation for creating variables seems to only allow for creating static variables inside a file in /etc/yum/vars/$variablename.

So what I want is to have /etc/yum/vars/dotrelease be the output of my command above, based on the system I am on.

Then I can set my baseurl repo to http://localrepo.com/repo/centos/$dotrelease/os/$basearch/

My custom repo is separated by dot release, where by default $releasever only looks the numbered release, for example, the $releasever variable on centos6.4 is "6".

I realize I can just

echo (cat /etc/redhat-release | awk '{ print $3 }') > /etc/yum/vars/dotrelease

but I'd have to run that on every machine I deploy, instead of just keeping the variable in a file.

linux centos redhat yum

share|improve this question

edited Aug 12 '14 at 0:27

Party Time

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

cat /etc/redhat-release | awk '{ print $3 }'

echo (cat /etc/redhat-release | awk '{ print $3 }') > /etc/yum/vars/dotrelease

share|improve this question

edited Aug 12 '14 at 0:27

Party Time

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

share|improve this question

edited Aug 12 '14 at 0:27

Party Time

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

asked Aug 11 '14 at 23:13

Party TimeParty Time

255

1 Answer
1

active

oldest

votes

0

Is puppet in your environment at all?

# facter operatingsystemrelease

6.5

Is quite clean...

But in your local repository, are you actually distributing different packages depending on the point release of your EL system? That may not make sense, as EL tends to automatically move/update to the newest point release within a major version. E.g. You won't see many people running RHEL 6.2 today, because there are no updates available.

share|improve this answer

edited Aug 12 '14 at 0:12

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am trying to do this outside of puppet. We maintain multiple versions of rhel and centos in house, so I need to have a repo for my 6.2 hosts, and a repo for my 6.5 hosts
  
  – Party Time
  Aug 12 '14 at 0:08
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can still use the facter tool without Puppet.
  
  – ewwhite
  Aug 12 '14 at 0:12
  

  
  
  
  

add a comment | 

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0

Is puppet in your environment at all?

# facter operatingsystemrelease

6.5

Is quite clean...

But in your local repository, are you actually distributing different packages depending on the point release of your EL system? That may not make sense, as EL tends to automatically move/update to the newest point release within a major version. E.g. You won't see many people running RHEL 6.2 today, because there are no updates available.

share|improve this answer

edited Aug 12 '14 at 0:12

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am trying to do this outside of puppet. We maintain multiple versions of rhel and centos in house, so I need to have a repo for my 6.2 hosts, and a repo for my 6.5 hosts
  
  – Party Time
  Aug 12 '14 at 0:08
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can still use the facter tool without Puppet.
  
  – ewwhite
  Aug 12 '14 at 0:12
  

  
  
  
  

add a comment | 

0

Is puppet in your environment at all?

# facter operatingsystemrelease

6.5

Is quite clean...

But in your local repository, are you actually distributing different packages depending on the point release of your EL system? That may not make sense, as EL tends to automatically move/update to the newest point release within a major version. E.g. You won't see many people running RHEL 6.2 today, because there are no updates available.

share|improve this answer

edited Aug 12 '14 at 0:12

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am trying to do this outside of puppet. We maintain multiple versions of rhel and centos in house, so I need to have a repo for my 6.2 hosts, and a repo for my 6.5 hosts
  
  – Party Time
  Aug 12 '14 at 0:08
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can still use the facter tool without Puppet.
  
  – ewwhite
  Aug 12 '14 at 0:12
  

  
  
  
  

add a comment | 

Is puppet in your environment at all?

# facter operatingsystemrelease

6.5

Is quite clean...

But in your local repository, are you actually distributing different packages depending on the point release of your EL system? That may not make sense, as EL tends to automatically move/update to the newest point release within a major version. E.g. You won't see many people running RHEL 6.2 today, because there are no updates available.

share|improve this answer

edited Aug 12 '14 at 0:12

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719

# facter operatingsystemrelease

6.5

share|improve this answer

edited Aug 12 '14 at 0:12

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719

answered Aug 11 '14 at 23:51

ewwhiteewwhite

174k75368719