how to execute a script from NFS mount (which disconnected)?

How can I execute a script from NSF mount - a script which reconfigures a network interface, and there is a period of network disconnection?

Quoted 2 lines · Tomasz Chmielewski

How can I execute a script from NSF mount - a script which reconfigures a network interface, and there is a period of network disconnection?

Copy it to a RAMFS partition and execute it there.

Quoted 5 lines · Trond Myklebust

Quoted 2 lines · Tomasz Chmielewski

How can I execute a script from NSF mount - a script which reconfigures a network interface, and there is a period of network disconnection?

Copy it to a RAMFS partition and execute it there.

No, that's not a good solution. Or a solution I would want to use.

I use the same script on systems having rootfs on iSCSI. And they also disconnect for a brief period of time.
There, everything works properly if I just "preload"/cache the script/programs with something like:

	cat script &>/dev/null
	program --help &>/dev/null

Then, I can disconnect the station for several minutes, but the system will have the programs/scripts cached, and will be able to use them.

I would like to do something similar with NFS. Isn't there a "disconnected" mode for NSF (or "cached", etc.)?

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Tomasz Chmielewski
http://wpkg.org

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Quoted 17 lines · On Tue, 22 May 2007 14:17:49 +0200 Tomasz Chmielewski <[email protected]> wrote:

Quoted 5 lines · Trond Myklebust

Quoted 2 lines · Tomasz Chmielewski

How can I execute a script from NSF mount - a script which reconfigures a network interface, and there is a period of network disconnection?

Copy it to a RAMFS partition and execute it there.

No, that's not a good solution. Or a solution I would want to use.

I use the same script on systems having rootfs on iSCSI. And they also disconnect for a brief period of time.
There, everything works properly if I just "preload"/cache the script/programs with something like:

	cat script &>/dev/null
	program --help &>/dev/null

Quoted 7 lines

Then, I can disconnect the station for several minutes, but the system will have the programs/scripts cached, and will be able to use them.

I would like to do something similar with NFS. Isn't there a "disconnected" mode for NSF (or "cached", etc.)?

Nope. NFS will (likely) want to check the attributes on the file to make sure it's not changed before executing it. Copying it to a secondary location is what you'll want to do.

<idle speculation>
I wonder if you could do something like this on NFSv4 with delegations? </idle speculation>

Quoted 14 lines

Signature · 12 lines

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Tomasz Chmielewski
http://wpkg.org

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Signature · 10 lines

Jeff Layton <[email protected]>

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Quoted 5 lines · Trond Myklebust

Quoted 2 lines · Tomasz Chmielewski

How can I execute a script from NSF mount - a script which reconfigures a network interface, and there is a period of network disconnection?

Copy it to a RAMFS partition and execute it there.

No, that's not a good solution. Or a solution I would want to use.

I use the same script on systems having rootfs on iSCSI. And they also disconnect for a brief period of time.
There, everything works properly if I just "preload"/cache the script/programs with something like:

	cat script &>/dev/null
	program --help &>/dev/null

Then, I can disconnect the station for several minutes, but the system will have the programs/scripts cached, and will be able to use them.

I would like to do something similar with NFS. Isn't there a "disconnected" mode for NSF (or "cached", etc.)?

This question may sound silly, but I didn't find a proper solution to it.

I have a script on a NFS share. The purpose of this script is to do some network reconfiguration for Xen.

Unfortunately, it fails to execute somewhere in the middle.

Basically, the script brings the network interface down, does a bit of reconfiguring, and then, the interface is brought up.

Unfortunately, when I execute it locally, the script freezes somewhere about step 2 or 3. Which I could perfectly understand - as the system can't read it.