mirror of
https://github.com/Luzifer/hetzner-alpine-k8s.git
synced 2024-12-21 02:11:19 +00:00
Move git module to included files
in order to be able to modify the code Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
parent
86cb81bf7c
commit
9c14dc02e5
GPG key ID:
D91C3E91E4CAD6F5
11 changed files with 486 additions and 4 deletions
3
.gitmodules
vendored
3
.gitmodules
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[submodule "alpine-on-hetzner"]
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path = alpine-on-hetzner
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url = https://github.com/MathiasPius/alpine-on-hetzner.git
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@ -1 +0,0 @@
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Subproject commit 1d21f3e35c65bcef267c0f98144d3e5d4ab3c4a3
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2
alpine-on-hetzner/.dockerignore
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2
alpine-on-hetzner/.dockerignore
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manifests/
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cache/
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3
alpine-on-hetzner/.gitignore
vendored
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3
alpine-on-hetzner/.gitignore
vendored
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manifests/
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configs/
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cache/
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40
alpine-on-hetzner/Dockerfile
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40
alpine-on-hetzner/Dockerfile
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ARG ALPINE_VERSION=3.16.0
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ARG PACKER_VERSION=1.8.0-r3
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ARG ANSIBLE_CORE_VERSION=2.13.0-r0
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ARG JQ_VERSION=1.6-r1
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ARG UID=1000
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ARG GID=1000
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FROM alpine:$ALPINE_VERSION
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ARG PACKER_VERSION
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ARG ANSIBLE_CORE_VERSION
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ARG JQ_VERSION
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ARG UID
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ARG GID
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RUN apk add --no-cache \
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ansible-core=$ANSIBLE_CORE_VERSION \
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packer=$PACKER_VERSION \
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jq=$JQ_VERSION
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RUN adduser ansible -u "$UID" -D -h /home/ansible "$GID"
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RUN mkdir -p /configs /manifests /cache \
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&& chown ansible /manifests /configs /cache
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USER ansible
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WORKDIR /home/ansible
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COPY default.json default.json
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COPY alpine.pkr.hcl alpine.pkr.hcl
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COPY playbook.yml playbook.yml
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COPY --chmod=u=rx,og= entrypoint.sh entrypoint.sh
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VOLUME /cache
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ENTRYPOINT ["/bin/sh", "entrypoint.sh"]
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CMD ["default.json"]
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LABEL "dev.pius.alpine-on-hetzner.alpine.version"=$ALPINE_VERSION
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LABEL "dev.pius.alpine-on-hetzner.pkgs.ansible-core.version"=$ANSIBLE_CORE_VERSION
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LABEL "dev.pius.alpine-on-hetzner.pkgs.packer.version"=$PACKER_VERSION
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LABEL "dev.pius.alpine-on-hetzner.pkgs.jq.version"=$JQ_VERSION
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21
alpine-on-hetzner/LICENSE
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21
alpine-on-hetzner/LICENSE
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MIT License
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Copyright (c) 2022 Mathias Pius
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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100
alpine-on-hetzner/README.md
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100
alpine-on-hetzner/README.md
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This folder contains a modified copy of [MathiasPius/alpine-on-hetzner](https://github.com/MathiasPius/alpine-on-hetzner).
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----
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# alpine-hetzner
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Tool for building cloud-init ready Alpine snapshots on Hetzner Cloud.
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You can either run it as a docker container or as a regular packer build (see [entrypoint.sh](/entrypoint.sh) for hints on how), but this latter method is not officially supported.
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# Examples
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### Create an alpine image with the [default](/default.json) configuration
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Running this will create an `alpine` snapshot within your Hetzner Cloud project, ready to use for creating new servers. See the [launching a server](#launching-a-server) section for how to test it!
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```shell
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docker run -it --rm -e "HCLOUD_TOKEN=<YourTokenHere>" ghcr.io/mathiaspius/alpine-on-hetzner:latest
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```
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### Default image, with `doas` installed, and `template.local` as default hostname
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Configuration values can be overwritten by creating new configuration file with just the changes you want, and supplying the path as an argument when running it. See [Custom Configuration](#custom-configuration) for technical details on how the values are merged.
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```shell
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mkdir -p configs
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echo '{
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"packages": { "doas": "=6.8.1-r7" },
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"hostname": "template.local"
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}' > configs/my-override.json
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export HCLOUD_TOKEN=myHetznerCloudToken
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docker run -it --rm \
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-e "HCLOUD_TOKEN" \
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-v "$(pwd)/configs:/configs" \
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ghcr.io/mathiaspius/alpine-on-hetzner:latest default.json /configs/my-override.json
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```
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There are a number of optional docker mounts you can use:
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* `/manifests` contains the output manifests from the run.
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* `/cache` used for caching the `apk-tools` package locally between runs.
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* `/configs` used for providing [custom configuration files](#custom-configuration) to builds.
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# Custom Configuration
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Any command arguments passed to the docker run invocation will be treated as paths to configuration files to merge into a single combined configuration file which is then fed into the packer build.
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The merge is a "deep merge", meaning you can only *add to* or *change* the configuration file not remove from it. If you want to remove a package from the default.json configuration for example you will have to create a copy of it without the package in question and use that as the basis for your build.
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### Adding a custom package to your image
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In order to add a custom package like `nginx` for example you can create the following config file `configs/nginx.json` in your local directory:
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```json
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{ "packages": { "nginx": "" } }
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```
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<sup><sub>`packages` is a map where the keys are package names and the value is the version selector. The map is passed directly to an `apk add` command, see [this link](https://wiki.alpinelinux.org/wiki/Package_management#Holding_a_specific_package_back) for version-pinning syntax.</sub></sup>
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When the container is then run like so:
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```shell
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docker run -it --rm \
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-e "HCLOUD_TOKEN" \
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-v "$(pwd)/configs:/configs" \
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ghcr.io/mathiaspius/alpine-on-hetzner:latest default.json /configs/nginx.json
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```
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The package will be appended to `packages` array, like so, immediately before the packer build runs:
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```json
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{
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(...)
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"packages": {
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"openssh": "=8.8_p1-r1",
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"syslinux": "=6.04_pre1-r9",
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"linux-virt": "=5.15.16-r0",
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"cloud-init": "@community=21.4-r0",
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"nginx": ""
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}
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}
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```
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# What's in the finished snapshot?
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See the [default.json](/default.json) config for a list of packages that will be installed into the snapshot if run without any arguments.
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[playbook.yml](/playbook.yml) contains the entire ansible playbook used for generating the snapshot.
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[alpine.pkr.hcl](/alpine.pkr.hcl) contains the packer build configuration which uses the playbook above via the [Ansible Provisioner](https://www.packer.io/plugins/provisioners/ansible/ansible)
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# How it works
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The docker image comes with packer, ansible and jq pre-installed (check labels for versions), and builds the [alpine.pkr.hcl](/alpine.pkr.hcl) build against your Hetzner Cloud project using your provided API key. The Packer build will boot a server in rescue mode, then format and install Alpine Linux onto the primary drive of the server. Once done, the server will be saved as a snapshot and shut down. You can then create Alpine Linux servers using the finished snapshot.
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# Launching a server
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Servers built from the snapshot won't be immediately accessible because the root user is locked by default, but can be configured using the Hetzner interface. Use the following cloud-init config to enable root access and select an ssh key when creating the server to allow login:
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```yaml
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#cloud-config
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disable_root: false
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users:
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- name: root
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lock-passwd: false
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```
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# Development
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I have a number of ideas I would like to explore:
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- [ ] Re-using or expanding this tool to provision Alpine Linux on dedicated servers, but maintaining the same configuration -interface. I've previously done a less refined version fo this project for dedicated servers [here](https://github.com/MathiasPius/hetzner-zfs-host)
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- [ ] Splitting up configuration files so you can mix-and-match a little more. Would also allow optional *hardened* configurations for example which you could opt into for stricter security.
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- [ ] Creating configuration files for older versions of Alpine Linux.
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- [x] Pipelining alpine-on-hetzner docker image builds and perhaps more importantly..
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- [ ] .. Testing that they work.
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- [x] Add more customization abilities to the configuration file. Being able to enable openrc services with a simple array for example would be simple to implement and very useful.
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67
alpine-on-hetzner/alpine.pkr.hcl
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67
alpine-on-hetzner/alpine.pkr.hcl
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# Please see default.json for default values for these
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variable "apk_tools_url" {}
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variable "apk_tools_arch" {}
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variable "apk_tools_version" {}
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variable "apk_tools_checksum" {}
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variable "alpine_version" {}
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variable "alpine_mirror" {}
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variable "alpine_repositories" {}
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variable "boot_size" {}
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variable "root_size" {}
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variable "hostname" {}
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variable "packages" {}
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variable "services" {}
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variable "nameservers" {}
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variable "extlinux_modules" {}
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variable "kernel_features" {}
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variable "kernel_modules" {}
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variable "default_kernel_opts" {}
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variable "sysctl" {}
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variable "chroot_commands" {}
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locals {
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timestamp = formatdate("DD-MM-YY.hh-mm-ss", timestamp())
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snapshot_id = sha1(uuidv4())
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}
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source "hcloud" "alpine" {
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location = "fsn1"
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server_type = "cx11"
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image = "ubuntu-20.04"
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rescue = "linux64"
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ssh_username = "root"
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}
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build {
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name = "alpine"
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source "source.hcloud.alpine" {
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snapshot_name = var.hostname
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snapshot_labels = {
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"alpine.pius.dev/timestamp" = local.timestamp
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"alpine.pius.dev/alpine-version" = var.alpine_version
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"alpine.pius.dev/snapshot-id" = local.snapshot_id
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}
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}
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provisioner "ansible" {
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playbook_file = "playbook.yml"
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extra_arguments = ["--extra-vars", "@config.json"]
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}
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post-processor "manifest" {
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output = "/manifests/${build.PackerRunUUID}.json"
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strip_path = true
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custom_data = merge({
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"alpine.pius.dev/alpine-version": var.alpine_version,
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"alpine.pius.dev/packer-run-id": build.PackerRunUUID,
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"alpine.pius.dev/snapshot-id": local.snapshot_id
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}, zipmap(
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formatlist("alpine.pius.dev/%s-version", keys(var.packages)),
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values(var.packages)
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))
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||||||
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}
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}
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57
alpine-on-hetzner/default.json
Normal file
57
alpine-on-hetzner/default.json
Normal file
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{
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"apk_tools_version": "v2.12.9",
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"apk_tools_arch": "x86_64",
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"apk_tools_url": "https://gitlab.alpinelinux.org/api/v4/projects/5/packages/generic//{{ apk_tools_version }}/{{ apk_tools_arch }}/apk.static",
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"apk_tools_checksum": "sha256:5176da3d4c41f12a08b82809aca8e7e2e383b7930979651b8958eca219815af5",
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||||||
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"alpine_version": "v3.15",
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"alpine_mirror": "http://dl-cdn.alpinelinux.org/alpine",
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"alpine_repositories": ["main", "community"],
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||||||
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"boot_size": "+100m",
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"root_size": "0",
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||||||
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||||||
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"hostname": "alpine",
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||||||
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||||||
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"packages": {
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"openssh": "=8.8_p1-r1",
|
||||||
|
"syslinux": "=6.04_pre1-r9",
|
||||||
|
"linux-virt": "=5.15.16-r0",
|
||||||
|
"cloud-init": "@community=21.4-r0"
|
||||||
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},
|
||||||
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|
||||||
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"services": {
|
||||||
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"devfs": "sysinit",
|
||||||
|
"dmesg": "sysinit",
|
||||||
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"mdev": "sysinit",
|
||||||
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"hwdrivers": "sysinit",
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||||||
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||||||
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"hwclock": "boot",
|
||||||
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"modules": "boot",
|
||||||
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"sysctl": "boot",
|
||||||
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"hostname": "boot",
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||||||
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"bootmisc": "boot",
|
||||||
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"syslog": "boot",
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||||||
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"networking": "boot",
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||||||
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||||||
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"mount-ro": "shutdown",
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||||||
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"killprocs": "shutdown",
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||||||
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"savecache": "shutdown",
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||||||
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|
||||||
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"sshd": "default"
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||||||
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},
|
||||||
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||||||
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"nameservers": [
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||||||
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"185.12.64.1",
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||||||
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"185.12.64.2",
|
||||||
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"2a01:4ff:ff00::add:1",
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||||||
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"2a01:4ff:ff00::add:2"
|
||||||
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],
|
||||||
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||||||
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"sysctl": {},
|
||||||
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"extlinux_modules": ["ext4"],
|
||||||
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"kernel_features": ["base", "ext4", "keymap", "virtio"],
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"kernel_modules": ["ipv6", "af_packet"],
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||||||
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"default_kernel_opts": ["quiet"],
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||||||
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"chroot_commands": []
|
||||||
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}
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||||||
17
alpine-on-hetzner/entrypoint.sh
Normal file
17
alpine-on-hetzner/entrypoint.sh
Normal file
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||||||
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#!/bin/sh
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||||||
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|
||||||
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export PACKER_CACHE_DIR=/cache/.cache
|
||||||
|
export PACKER_CONFIG_DIR=/cache/.config
|
||||||
|
export PACKER_ANSIBLE_DIR=/cache/.ansible
|
||||||
|
|
||||||
|
# Combine all the configuration paths passed as arguments.
|
||||||
|
jq -s 'reduce .[] as $item ({}; . * $item)' "$@" > config.json
|
||||||
|
|
||||||
|
echo "Combined configuration:"
|
||||||
|
cat config.json
|
||||||
|
|
||||||
|
|
||||||
|
echo "Starting Packer Build"
|
||||||
|
/usr/bin/packer build \
|
||||||
|
-var-file="config.json" \
|
||||||
|
.
|
||||||
179
alpine-on-hetzner/playbook.yml
Normal file
179
alpine-on-hetzner/playbook.yml
Normal file
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|
@ -0,0 +1,179 @@
|
||||||
|
---
|
||||||
|
- name: prepare environment
|
||||||
|
hosts: localhost
|
||||||
|
tasks:
|
||||||
|
- name: cache apk tools
|
||||||
|
get_url:
|
||||||
|
url: "{{ apk_tools_url }}"
|
||||||
|
dest: /cache/apk.static
|
||||||
|
checksum: "{{ apk_tools_checksum }}"
|
||||||
|
|
||||||
|
- name: configure alpine
|
||||||
|
hosts: all
|
||||||
|
gather_facts: false
|
||||||
|
vars:
|
||||||
|
chroot_directory: /mnt
|
||||||
|
root_device_path: "/dev/sda"
|
||||||
|
tasks:
|
||||||
|
- name: deploy apk-tools to rescue system
|
||||||
|
copy:
|
||||||
|
src: /cache/apk.static
|
||||||
|
dest: apk
|
||||||
|
mode: ug=rwx,o=r
|
||||||
|
|
||||||
|
- name: "zap all partitions on {{ root_device_path }} and create GPT table"
|
||||||
|
shell: "sgdisk --zap-all {{ root_device_path }}"
|
||||||
|
|
||||||
|
- name: "create boot partition {{ root_device_path }}-boot"
|
||||||
|
shell: "sgdisk -g -n1:0:{{ boot_size }} -t1:8300 -c1:boot -A1:set:2 {{ root_device_path }}"
|
||||||
|
|
||||||
|
- name: "create root partition {{ root_device_path }}-root"
|
||||||
|
shell: "sgdisk -g -n2:0:{{ root_size }} -t2:8300 -c2:root {{ root_device_path }}"
|
||||||
|
|
||||||
|
- name: mount-drives
|
||||||
|
shell: |
|
||||||
|
umount -R /mnt
|
||||||
|
|
||||||
|
mkfs.ext4 -q -L root /dev/disk/by-partlabel/root
|
||||||
|
mkfs.ext4 -m 0 -q -L boot /dev/disk/by-partlabel/boot
|
||||||
|
mount /dev/disk/by-partlabel/root {{ chroot_directory }}
|
||||||
|
mkdir -p {{ chroot_directory }}/boot
|
||||||
|
mount /dev/disk/by-partlabel/boot {{ chroot_directory }}/boot
|
||||||
|
|
||||||
|
- name: initialize alpine-base in directory
|
||||||
|
shell: >-
|
||||||
|
./apk -X {{ alpine_mirror }}/{{ alpine_version }}/{{ alpine_repositories[0] }}
|
||||||
|
-u
|
||||||
|
--allow-untrusted
|
||||||
|
--root /{{ chroot_directory }}
|
||||||
|
--initdb
|
||||||
|
add alpine-base
|
||||||
|
|
||||||
|
- name: prepare chroot
|
||||||
|
shell: |
|
||||||
|
mount --bind /dev {{ chroot_directory }}/dev
|
||||||
|
mount --bind /proc {{ chroot_directory }}/proc
|
||||||
|
mount --bind /sys {{ chroot_directory }}/sys
|
||||||
|
|
||||||
|
- name: copy resolv conf from the rescue system to the server
|
||||||
|
copy:
|
||||||
|
content: |
|
||||||
|
{% for nameserver in nameservers %}
|
||||||
|
nameserver {{ nameserver }}
|
||||||
|
{% endfor %}
|
||||||
|
dest: "{{ chroot_directory }}/etc/resolv.conf"
|
||||||
|
|
||||||
|
- name: setup networking
|
||||||
|
copy:
|
||||||
|
content: |
|
||||||
|
auto lo
|
||||||
|
iface lo inet loopback
|
||||||
|
auto eth0
|
||||||
|
iface eth0 inet dhcp
|
||||||
|
iface eth0 inet6 auto
|
||||||
|
dest: "{{ chroot_directory }}/etc/network/interfaces"
|
||||||
|
|
||||||
|
- name: write out hostname file
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/hostname"
|
||||||
|
content: "{{ hostname }}"
|
||||||
|
|
||||||
|
- name: overwrite hosts file
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/hosts"
|
||||||
|
content: |
|
||||||
|
127.0.0.1 {{ hostname }} localhost localhost.localdomain
|
||||||
|
::1 {{ hostname }} localhost localhost.localdomain
|
||||||
|
::1 {{ hostname }} localhost ipv6-localhost ipv6-loopback
|
||||||
|
fe00::0 ipv6-localnet
|
||||||
|
ff00::0 ipv6-mcastprefix
|
||||||
|
ff02::1 ipv6-allnodes
|
||||||
|
ff02::2 ipv6-allrouters
|
||||||
|
ff02::3 ipv6-allhosts
|
||||||
|
|
||||||
|
- name: define alpine repositories
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/apk/repositories"
|
||||||
|
content: |
|
||||||
|
{% for repository in alpine_repositories %}
|
||||||
|
{% if loop.first %}
|
||||||
|
{{ alpine_mirror }}/{{ alpine_version }}/{{ repository }}
|
||||||
|
{% else %}
|
||||||
|
@{{ repository }} {{ alpine_mirror }}/{{ alpine_version }}/{{ repository }}
|
||||||
|
{% endif %}
|
||||||
|
{% endfor %}
|
||||||
|
|
||||||
|
- name: install requisite packages
|
||||||
|
shell: |
|
||||||
|
chroot {{ chroot_directory }} apk add --no-cache {{ item.key }}{{ item.value }}
|
||||||
|
loop: "{{ packages | dict2items }}"
|
||||||
|
|
||||||
|
- name: configure services
|
||||||
|
shell: |
|
||||||
|
chroot {{ chroot_directory }} rc-update add {{ item.key }} {{ item.value }}
|
||||||
|
loop: "{{ services | dict2items }}"
|
||||||
|
|
||||||
|
- name: enable cloud-init
|
||||||
|
shell: |
|
||||||
|
chroot {{ chroot_directory }} setup-cloud-init
|
||||||
|
when: packages["cloud-init"] is defined
|
||||||
|
|
||||||
|
- name: configure fstab
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/fstab"
|
||||||
|
content: |
|
||||||
|
{{ root_device_path }}2 / ext4 defaults,noatime 0 0
|
||||||
|
{{ root_device_path }}1 /boot ext4 defaults 0 2
|
||||||
|
|
||||||
|
- name: configure sysctl
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/sysctl.conf"
|
||||||
|
content: |
|
||||||
|
{% for setting in sysctl | dict2items %}
|
||||||
|
{{ setting.key }} = {{ setting.value }}
|
||||||
|
{% endfor %}
|
||||||
|
|
||||||
|
- name: configure kernel modules
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/modules"
|
||||||
|
content: |
|
||||||
|
{% for module in kernel_modules %}
|
||||||
|
{{ module }}
|
||||||
|
{% endfor %}
|
||||||
|
|
||||||
|
- name: configure extlinux
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/update-extlinux.conf"
|
||||||
|
content: |
|
||||||
|
overwrite=1
|
||||||
|
vesa_menu=0
|
||||||
|
default_kernel_opts="{{ default_kernel_opts | join(" ") }}"
|
||||||
|
modules={{ extlinux_modules | join(",") }}
|
||||||
|
root={{ root_device_path }}2
|
||||||
|
verbose=0
|
||||||
|
hidden=1
|
||||||
|
timeout=1
|
||||||
|
default=lts
|
||||||
|
serial_port=
|
||||||
|
serial_baud=115200
|
||||||
|
xen_opts=dom0_mem=384M
|
||||||
|
password=''
|
||||||
|
|
||||||
|
- name: configure mkinitfs
|
||||||
|
copy:
|
||||||
|
dest: "{{ chroot_directory }}/etc/mkinitfs/mkinitfs.conf"
|
||||||
|
content: |
|
||||||
|
features="{{ kernel_features | join(" ") }}"
|
||||||
|
|
||||||
|
- name: install boot
|
||||||
|
shell: |
|
||||||
|
chroot {{ chroot_directory }} update-extlinux
|
||||||
|
chroot {{ chroot_directory }} extlinux -i /boot
|
||||||
|
chroot {{ chroot_directory }} dd bs=440 conv=notrunc count=1 if=/usr/share/syslinux/gptmbr.bin of={{ root_device_path }}
|
||||||
|
|
||||||
|
- name: execute arbitrary commands
|
||||||
|
shell: |
|
||||||
|
chroot {{ chroot_directory }} sh <<CHROOT_COMMAND_HD
|
||||||
|
{{ item }}
|
||||||
|
CHROOT_COMMAND_HD
|
||||||
|
loop: "{{ chroot_commands }}"
|
||||||
Loading…
Reference in a new issue