Signed-off-by: Xu Xijian hdxuxijian@163.com --- doc/job/os_mount.md | 8 ++++++++ 1 file changed, 8 insertions(+)

diff --git a/doc/job/os_mount.md b/doc/job/os_mount.md index eab95ed..b9b8308 100644 --- a/doc/job/os_mount.md +++ b/doc/job/os_mount.md @@ -47,6 +47,7 @@ The brief flow is as follows: ${boot_lv} -- boot logical volume: - will boot from this lv. - boot_lv=/dev/mapper/os-${os}_${os_arch}_${os_version} + - check whether ${pv_device} is given, if so, create physical volume(pv for short) and volume group(vg for short) on ${pv_device}. - if ${src_lv} not exists: create it, and rsync the rootfs from cluster nfs server. - if ${boot_lv} exists: delete it. - create ${boot_lv} as the snapshot of ${src_lv}. @@ -57,6 +58,7 @@ The brief flow is as follows: ## persistent rootfs data

When you need to persist the rootfs data of a job, and use it in the subsequent job(s), two fields in `kernel_custom_params` will help you: 'src_lv_suffix', 'boot_lv_suffix'. +If you want to run on a brand new machine, you should use 'pv_device' to assign a disk device to create pv and vg.

The brief flow is as follows:

@@ -65,6 +67,7 @@ The brief flow is as follows: 2. initrd stage: use_root_partition seems like /dev/mapper/os-${os}_${os_arch}_${os_version}_${src_lv_suffix} save_root_partition seems like /dev/mapper/os-${os}_${os_arch}_${os_version}_${boot_lv_suffix} + check and ensure pv and vg exist for lv. - firstly, we need two logical volume: ${src_lv} -- src logical volume: - if have ${use_root_partition}, src_lv=${use_root_partition} @@ -95,6 +98,8 @@ Demo usage: data of job-20210218.yaml. Then you need add the follow field in your job-20210219.yaml: kernel_custom_params: src_lv_suffix=zhangsan_local_for_iperf_20210218 + - if you want to create pv and vg on /dev/sda, you can use like this: + kernel_custom_params: pv_device=/dev/sda ... ```

Notes: @@ -148,6 +153,9 @@ Notes:

lvdisplay ${src_lv} > /dev/null && return

+ # need create volume group, usually in first use of this machine. $pv_device e.g. /dev/sda + [ -n "$pv_device" ] && { do some check and create pv and vg } + # create logical volume lvcreate --size 10G --name $(basename ${src_lv}) os || exit