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CloudAtCostにRancherOSをインストール

Last updated at Posted at 2015-12-08

インストール

現在の設定確認

  • CloudAtCost上のLinuxで作業。
  • IPアドレス、デフォルトゲートウェイをメモっておく。
  • Releases · rancher/os · GitHubからrancheros.isoをダウンロード
dd if=rancheros.iso of=/dev/sda bs=1M;sync;
  • OS再起動させるとRancherOSが起動します。

パーティション設定

パーティション
$ sudo fdisk -l /dev/sda

Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x3c394a3d

Device     Boot   Start      End  Sectors  Size Id Type
/dev/sda1  *          0    59391    59392   29M 17 Hidden HPFS/NTFS
/dev/sda2         59392  1038335   978944  478M 82 Linux Swap
/dev/sda3       1038336 20971519 19933184  9.5G 83 Linux
/dev/sda2をext4でフォーマット
mkswap /dev/sda2
mkfs.ext4 -L RANCHER_STATE /dev/sda3
reboot

IPアドレス設定

/usr/share/ros/os-config.yml
   network:
     dns:
       nameservers: [8.8.8.8, 8.8.4.4]
     interfaces:
-      eth*:
-        dhcp: true
+      eth0:
+        address: 222.222.222.222/24
+        gateway: 222.222.222.221
  • reboot

debian-consoleに切り替え

ros service enable debian-console
reboot

swap自動マウント

/etc/rc.local
+ /sbin/swapon /dev/sda2
  exit 0

sshd_config修正

/etc/ssh/sshd_config
- #PasswordAuthentication yes
+ PasswordAuthentication no

状態確認(debian-console上)

ディスク
$ df -h 
Filesystem      Size  Used Avail Use% Mounted on
overlay         9.3G  438M  8.4G   5% /
devtmpfs        233M     0  233M   0% /dev
tmpfs           247M     0  247M   0% /sys/fs/cgroup
/dev/sda3       9.3G  438M  8.4G   5% /opt
none            247M  236K  247M   1% /run
shm              64M     0   64M   0% /dev/shm
メモリ
$ free -m
             total       used       free     shared    buffers     cached
Mem:           492        278        214        108         10        186
-/+ buffers/cache:         80        411
Swap:          477          0        477

ファイアウォール(ufw)

sudo apt-get install -y ufw
/etc/default/ufw
- IPV6=yes
+ IPV6=no
ファイアウォール設定
ufw default deny
ufw allow 22
ufw enable
/etc/rc.local
+ /usr/sbin/ufw enable
ファイアウォール状態
# ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing)
New profiles: skip

To                         Action      From
--                         ------      ----
22                         ALLOW IN    Anywhere
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