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Docs for the elide parts of the kernel cmdline

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Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
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Sven Dowideit 2017-03-11 15:41:11 +10:00
parent f6ce1f0685
commit 368a13ed13
2 changed files with 14 additions and 2 deletions
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14
docs/os/running-rancheros/server/pxe/index.md
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@ -18,7 +18,19 @@ initrd ${base-url}/initrd
boot
```
### Datasources
### 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
will be passed to the RancherOS init process and stored in the `root` accessible `/var/lib/rancher/conf/cloud-init.d/init.yml` file, and are available to the root user from the `ros config` commands.
For example, the `kernel` line above could be written as:
```
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]
```
### cloud-init Datasources
Valid [datasources](https://github.com/rancher/os/blob/3338c4ac63597940bcde7e6005f1cc09287062a2/cmd/cloudinit/cloudinit.go#L378) for RancherOS.

2
docs/os/upgrading/index.md
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@ -9,7 +9,7 @@ layout: os-default
If RancherOS has released a new version and you want to learn how to upgrade your OS, we make it easy using the `ros os` command.
Since RancherOS is a kernel and initrd, the upgrade process is downloading a new kernel and initrd, and updating the boot loader to point to it. The old kernel and initrd are not removed. If there is a problem with your upgrade, you can select the old kernel from the bootloader, which is grub2 by default.
Since RancherOS is a kernel and initrd, the upgrade process is downloading a new kernel and initrd, and updating the boot loader to point to it. The old kernel and initrd are not removed. If there is a problem with your upgrade, you can select the old kernel from the Syslinux bootloader.
To see all of our releases, please visit our [releases page](https://github.com/rancher/os/releases) in GitHub.