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CoreOSの設定ファイルをcloud-config.ymlからIgnitionに変更する

更新日:2019.04.27 作成日:2017.09.30
#CoreOS #VPS

CoreOSの設定ファイルであるcloud-config.ymlは、いつのまにか推奨されなくなっていました。その代わりにIgnitionによる設定に変更になったようです。

NOTE: coreos-cloudinit is no longer under active development and has been superseded by Ignition. For more information about the recommended tools for provisioning Container Linux, refer to the provisioning documentation.
https://coreos.com/os/docs/1590.0.0/cloud-config.html

Ignitionとcoreos-cloudinitの違い

  • YAMLではなくJSON
  • Ignitionは一度だけ動かせばよい

Config transpiler

coreos/container-linux-config-transpiler: Convert a Container Linux Config into Ignition

https://github.com/coreos/container-linux-config-transpiler/releases からビルド済のバイナリをダウンロードして、~/binにいれた。

$ ct -in-file container-linux-conf.yml -out-file dist/config.ign -platform gce -pretty -strict

Cloud-config.ymlからの移行方法

https://coreos.com/os/docs/latest/migrating-to-clcs.html

Local Side

ct -in-file container-linux-conf.yml -out-file dist/config.ign -platform gce -pretty -strict

Conoha VPSにアップロード

scp dist/config.ign core@conoha:/home/core/coreos

Server Side

sudo coreos-install -d /dev/vda -i config.ign
Downloading the signature for https://alpha.release.core-os.net/amd64-usr/1576.1.0/coreos_production_image.bin.bz2...
2017-11-12 13:42:23 URL:https://alpha.release.core-os.net/amd64-usr/1576.1.0/coreos_production_image.bin.bz2.sig [566/566] -> "/tmp/coreos-install.vdMOgvRSTU/coreos_production_image.bin.bz2.sig" [1]
Downloading, writing and verifying coreos_production_image.bin.bz2...

Broadcast message from locksmithd at 2017-11-12 13:43:26.968917552 +0900 JST:
System reboot in 5 minutes!

2017-11-12 13:43:29 URL:https://alpha.release.core-os.net/amd64-usr/1576.1.0/coreos_production_image.bin.bz2 [337340573/337340573] -> "-" [1]
gpg: Signature made Thu Oct 26 14:07:48 2017 JST
gpg:                using RSA key 8826AD9569F575AD3F5643E7DE2F8F87EF4B4ED9
gpg: key 50E0885593D2DCB4 marked as ultimately trusted
gpg: checking the trustdb
gpg: marginals needed: 3  completes needed: 1  trust model: pgp
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: Good signature from "CoreOS Buildbot (Offical Builds) <[email protected]>" [ultimate]
blockdev: ioctl error on BLKRRPART: Device or resource busy
Failed to reread partitions on /dev/vda
blockdev: ioctl error on BLKRRPART: Device or resource busy
Failed to reread partitions on /dev/vda
blockdev: ioctl error on BLKRRPART: Device or resource busy
Failed to reread partitions on /dev/vda
blockdev: ioctl error on BLKRRPART: Device or resource busy
Failed to reread partitions on /dev/vda
Error: return code 1 from read -rt 300 _disk_status 0<> "${WORKDIR}/disk_modified"
wipefs: error: /dev/vda: probing initialization failed: Device or resource busy
Connection to 150.95.148.60 closed.

サーバ死んだ。。。

Imageが保存されているので、途中から元に戻せるが一旦初期化する。 サーバー再起動

conoha-iso コマンド

https://github.com/hironobu-s/conoha-iso

curl -sL https://github.com/hironobu-s/conoha-iso/releases/download/current/conoha-iso-osx.amd64.gz | zcat > conoha-iso && chmod +x ./conoha-iso
./conoha-iso download -i https://beta.release.core-os.net/amd64-usr/current/coreos_production_iso_image.iso
INFO[0001] Download request was accepted.
./conoha-iso list
[Image1]
Name:  coreos_production_iso_image.iso
Url:   https://beta.release.core-os.net/amd64-usr/current/coreos_production_iso_image.iso
Path:  /mnt/isos/repos/tenant_iso_data/f4d7162265934927b4db72d1df18fb15/coreos_production_iso_image.iso
Ctime: Thu May 28 09:07:56 2015

サーバ停止

./conoha-iso insert
[1] vps-2017-04-16-11-07 (150-95-148-60)
Please select VPS [1]: 1

[1] coreos_production_iso_image.iso
Please select ISO [1]: 1
INFO[0013] ISO file was inserted and changed boot device.

一時的にパスワード設定

sudo passwd core

sudo coreos-install -d /dev/vda -C stable -c cloud-config.yml Checking availability of “local-file” Fetching user-data from datasource of type “local-file” Downloading the signature for http://stable.release.core-os.net/amd64-usr/681.0.0/coreos_production_image.bin.bz2 … 2017-11-12 16:38:30 URL:http://stable.release.core-os.net/amd64-usr/681.0.0/coreos_production_image.bin.bz2.sig [543/543] -> “/tmp/coreos-install.mvLeGcbt8H/coreos_production_image.bin.bz2.sig” [1] Downloading, writing and verifying coreos_production_image.bin.bz2… 2017-11-12 16:39:19 URL:http://stable.release.core-os.net/amd64-usr/681.0.0/coreos_production_image.bin.bz2 [200347045/200347045] -> “-” [1] gpg: Signature made Thu May 14 09:54:23 2015 JST using RSA key ID E5676EFC gpg: key 93D2DCB4 marked as ultimately trusted gpg: checking the trustdb gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u gpg: Good signature from “CoreOS Buildbot (Offical Builds) [email protected] ” [ultimate] gpg: Note: This key has expired! Primary key fingerprint: 0412 7D0B FABE C887 1FFB 2CCE 50E0 8855 93D2 DCB4 Subkey fingerprint: EEFA 7555 E481 D026 CC40 D8E6 A5A9 6635 E567 6EFC Installing cloud-config… Success! CoreOS stable 681.0.0 is installed on /dev/vda

docker-compose

今回は、導入せずに置こうと思ったが、入れてしまった。

CoreOSは/opt/binにパスが通っている。/opt/binディレクトリを作成してdocker-composeのバイナリを配置して、実行権限を付与すればO.K.

https://docs.docker.com/compose/install/#install-compose を参考に、最新のdocker-composeを導入した。

sudo mkdir -p /opt/bin
sudo curl -L https://github.com/docker/compose/releases/download/1.17.0/docker-compose-`uname -s`-`uname -m` -o /opt/bin/docker-compose
sudo chmod +x /opt/bin/docker-compose
docekr-compose --verison

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