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Boot a non-persistent RancherOS to RAM via iPXE

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niusmallnan
2019-05-10 11:53:10 +08:00
parent 7ac38a5758
commit b4964aa455
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content/os/v1.x/en/installation/running-rancheros/server/pxe/_index.md
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@@ -10,11 +10,15 @@ weight: 112
# Location of Kernel/Initrd images
set base-url http://releases.rancher.com/os/latest
kernel ${base-url}/vmlinuz rancher.state.dev=LABEL=RANCHER_STATE rancher.state.autoformat=[/dev/sda] rancher.cloud_init.datasources=[url:http://example.com/cloud-config]
kernel ${base-url}/vmlinuz rancher.state.dev=LABEL=RANCHER_STATE rancher.state.autoformat=[/dev/sda] rancher.state.wait rancher.cloud_init.datasources=[url:http://example.com/cloud-config]
initrd ${base-url}/initrd
boot
```
If you want to autoformat the disk when booting by iPXE, you should add the `rancher.state.autoformat` part to kernel cmdline. However, this does not install the bootloader to disk, so you cannot upgrade RancherOS.
If you don't add `rancher.state.autoformat`, RancherOS will run completely in memory, you can execute `ros install` to install to disk.
### Hiding sensitive kernel commandline parameters
From RancherOS v0.9.0, secrets can be put on the `kernel` parameters line afer a `--` double dash, and they will be not be shown in any `/proc/cmdline`. These parameters