[PATCH v2] Documentation: step by step guide on confiuring kdump in live images

[Tong Li]

This is a short documentation on how to setup kdump on live images. All steps
was tested on Fedora 25 Alpha LiveCD and successfully saved vmcore captured
by kdump to a USB stick.

Signed-off-by: Tong Li 
---
 live-image-kdump-howto.txt | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 live-image-kdump-howto.txt

diff --git a/live-image-kdump-howto.txt b/live-image-kdump-howto.txt
new file mode 100644
index 0000000..e57e75b
--- /dev/null
+++ b/live-image-kdump-howto.txt
@@ -0,0 +1,23 @@
+Kdump now works on live images with some manual configurations. Here is the step
+by step guide.
+
+1. Enable crashkernel reservation
+
+Since there isn't any config files that can be used for adding kernel parameters
+for Live images, we have to append 'crashkernel' argument in boot menu every
+time we boot a Live image.
+
+2. Change dump target in /etc/kdump.conf
+
+When kdump kernel boots in a live environment, the default target /var/crash is
+in in ram so you need change the dump target to an external disk or an network
+dump target.
+
+3. Start kdump service
+    
+    $ kdumpctl start
+
+4. Trigger a kdump test
+
+    $ echo 1 > /proc/sys/kernel/sysrq
+    $ echo c > /proc/sysrq-trigger

[Baoquan He]

On 10/13/16 at 04:16pm, Tong Li wrote:
> This is a short documentation on how to setup kdump on live images. All steps
> was tested on Fedora 25 Alpha LiveCD and successfully saved vmcore captured
> by kdump to a USB stick.
> Signed-off-by: Tong Li
>
> live-image-kdump-howto.txt | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 live-image-kdump-howto.txt
>
> diff --git a/live-image-kdump-howto.txt b/live-image-kdump-howto.txt
> new file mode 100644
> index 0000000..e57e75b
> --- /dev/null
> +++ b/live-image-kdump-howto.txt
> @@ -0,0 +1,23 @@
> +Kdump now works on live images with some manual configurations. Here is the step
> +by step guide.
>
> +1. Enable crashkernel reservation
>
> +Since there isn't any config files that can be used for adding kernel parameters
> +for Live images, we have to append 'crashkernel' argument in boot menu every
> +time we boot a Live image.
>
> +2. Change dump target in /etc/kdump.conf
>
> +When kdump kernel boots in a live environment, the default target /var/crash is

~into
> +in in ram so you need change the dump target to an external disk or an network

~~duplicate
> +dump target.
>
> +3. Start kdump service
> $ kdumpctl start
>
> +4. Trigger a kdump test
> $ echo 1 > /proc/sys/kernel/sysrq
> $ echo c > /proc/sysrq-trigger
>
> -- 
> 2.7.4
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[Pratyush Anand]

On Thursday 13 October 2016 03:51 PM, Baoquan He wrote:
> On 10/13/16 at 04:16pm, Tong Li wrote:
> > This is a short documentation on how to setup kdump on live images. All steps
> > was tested on Fedora 25 Alpha LiveCD and successfully saved vmcore captured
> > by kdump to a USB stick.

It seems, you will need V3. It would be good if you send V3 of both the 
patch as series.

Use `git format-patch -C -M --thread=shallow HEAD~2` to create a series 
of both of your patches.

If you want to add a coverletter as well, then you may use

`git format-patch -C -M --thread=shallow --cover-letter`
> > Signed-off-by: Tong Li
> >
> > live-image-kdump-howto.txt | 23 +++++++++++++++++++++++
> >  1 file changed, 23 insertions(+)
> >  create mode 100644 live-image-kdump-howto.txt
> >
> > diff --git a/live-image-kdump-howto.txt b/live-image-kdump-howto.txt
> > new file mode 100644
> > index 0000000..e57e75b
> > --- /dev/null
> > +++ b/live-image-kdump-howto.txt
> > @@ -0,0 +1,23 @@
> > +Kdump now works on live images with some manual configurations. Here is the step
> > +by step guide.
> >
> > +1. Enable crashkernel reservation
> >
> > +Since there isn't any config files that can be used for adding kernel parameters
> > +for Live images, we have to append 'crashkernel' argument in boot menu every
> > +time we boot a Live image.
> >
> > +2. Change dump target in /etc/kdump.conf
> >
> > +When kdump kernel boots in a live environment, the default target /var/crash is
> 	    ~into
> > +in in ram so you need change the dump target to an external disk or an network
>  ~~duplicate
> > +dump target.

to change the..........		..... a network
> > +3. Start kdump service
> > $ kdumpctl start
> >
> > +4. Trigger a kdump test
> > $ echo 1 > /proc/sys/kernel/sysrq
> > $ echo c > /proc/sysrq-trigger

Thanks
~Pratyush