Removing watchdog and ipmi

Removing watchdog and ipmi

[Mike Jones]

Hi,

What is the proper way to remove phosphor-watchdog and ipmi from a project?

The goal is to not have the watchdog interfere in a raspberrypi project because there is no host, and there is no need for ipmi for my purposes.

I have created host-poweron and host-poweroff services and can manually start/stop them and see my regulators go on/off. I want the webui server power widget to power on/off using these services, but I think the watchdog is interfering. My understanding is obmc-chassis-poweron/off will trigger host-poweron/off.

Based on meta-quanta, I don’t see any other services I have to define to hook up host-poweron/off. This is why I think removing the watchdog is enough. But if there is any other interfering factor in a hostless system, I need to know that as well.

Mike

Re: Removing watchdog and ipmi

[Joseph Reynolds]

On 9/16/20 4:55 PM, Mike Jones wrote:
> Hi,
>
> What is the proper way to remove phosphor-watchdog and ipmi from a project?

I'm not an expert, but it seems like you would create a bbappend (maybe 
in the raspberry pi layer?) for 
https://github.com/openbmc/openbmc/blob/master/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
This append would undo the effect of: RDEPENDS_${PN} += 
"virtual/obmc-watchdog"
In this way, the phosphor-ipmi-host package would not pull in the 
watchdog package.

But you probably just need to remove phosphor-ipmi-host and 
phosphor-watchdog (via virtual/obmc-watchdog) will no longer be pulled 
into the image.

To remove phosphor-ipmi-host you would do something like: DEPENDS -= 
"phosphor-ipmi-host".

I hope someone who knows will tell us how to really do it!

- Joseph

> The goal is to not have the watchdog interfere in a raspberrypi project because there is no host, and there is no need for ipmi for my purposes.
>
> I have created host-poweron and host-poweroff services and can manually start/stop them and see my regulators go on/off. I want the webui server power widget to power on/off using these services, but I think the watchdog is interfering. My understanding is obmc-chassis-poweron/off will trigger host-poweron/off.
>
> Based on meta-quanta, I don’t see any other services I have to define to hook up host-poweron/off. This is why I think removing the watchdog is enough. But if there is any other interfering factor in a hostless system, I need to know that as well.
>
> Mike

Re: Removing watchdog and ipmi

[Mike]

Joseph,

I was able to get watchdog out, thanks.

I still can’t reboot through the webui, but that is probably because it eventually a service expects the host to chat over ipmi. However, I see my supplies power off and prove my host-poweroff.service works, confirming how things are connected.

Since my goal is to demonstrate how to integrate my products, this is probably good enough. But it does show that a system design without a host has more plumbing required to get things to work. For an FPGA or ASIC it might be a service acting like a host but monitoring GPIO pins.

If anyone knows of a similar service that plays the role of host, I would like to look at it.

Mike

Sent from my iPhone

> On Sep 17, 2020, at 4:25 PM, Joseph Reynolds <jrey@linux.ibm.com> wrote:
> 
> On 9/16/20 4:55 PM, Mike Jones wrote:
>> Hi,
>> 
>> What is the proper way to remove phosphor-watchdog and ipmi from a project?
> 
> I'm not an expert, but it seems like you would create a bbappend (maybe in the raspberry pi layer?) for https://github.com/openbmc/openbmc/blob/master/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
> This append would undo the effect of: RDEPENDS_${PN} += "virtual/obmc-watchdog"
> In this way, the phosphor-ipmi-host package would not pull in the watchdog package.
> 
> But you probably just need to remove phosphor-ipmi-host and phosphor-watchdog (via virtual/obmc-watchdog) will no longer be pulled into the image.
> 
> To remove phosphor-ipmi-host you would do something like: DEPENDS -= "phosphor-ipmi-host".
> 
> I hope someone who knows will tell us how to really do it!
> 
> - Joseph
> 
>> The goal is to not have the watchdog interfere in a raspberrypi project because there is no host, and there is no need for ipmi for my purposes.
>> 
>> I have created host-poweron and host-poweroff services and can manually start/stop them and see my regulators go on/off. I want the webui server power widget to power on/off using these services, but I think the watchdog is interfering. My understanding is obmc-chassis-poweron/off will trigger host-poweron/off.
>> 
>> Based on meta-quanta, I don’t see any other services I have to define to hook up host-poweron/off. This is why I think removing the watchdog is enough. But if there is any other interfering factor in a hostless system, I need to know that as well.
>> 
>> Mike
>