クラウド環境でArchLinuxを使う (Vultr編) ref: https://qiita.com/dseg/items/b4ad1c076dc585cb4432

ens3

Description='A basic static ethernet connection'
Interface=ens3
Connection=ethernet
IP=static
Address=('111.112.113.114/255.255.254.0')
Gateway='111.112.113.1'
DNS=('108.61.10.10')

## For IPv6 autoconfiguration
#IP6=stateless

## For IPv6 static address configuration
#IP6=static
#Address6=('1234:5678:9abc:def::1/64' '1234:3456::123/96')
#Routes6=('abcd::1234')
#Gateway6='1234:0:123::abcd'

file0.txt

nirvana% vultr plans|sort -n
VPSPLANID       NAME                                    VCPU    RAM     DISK    BANDWIDTH       PRICE
29              768 MB RAM,15 GB SSD,1.00 TB BW         1       768     15      1.00            5.00
87              512 MB RAM,125 GB SATA,1.00 TB BW       1       512     125     1.00            5.00
88              1024 MB RAM,250 GB SATA,2.00 TB BW      1       1024    250     2.00            10.00
89              2048 MB RAM,500 GB SATA,3.00 TB BW      1       2048    500     3.00            20.00
90              3072 MB RAM,750 GB SATA,4.00 TB BW      2       3072    750     4.00            30.00
91              4096 MB RAM,1000 GB SATA,5.00 TB BW     2       4096    1000    5.00            40.00
93              1024 MB RAM,20 GB SSD,2.00 TB BW        1       1024    20      2.00            10.00
94              2048 MB RAM,45 GB SSD,3.00 TB BW        2       2048    45      3.00            20.00
95              4096 MB RAM,90 GB SSD,4.00 TB BW        4       4096    90      4.00            40.00
96              8192 MB RAM,150 GB SSD,5.00 TB BW       6       8192    150     5.00            80.00
97              16384 MB RAM,300 GB SSD,6.00 TB BW      8       16384   300     6.00            160.00
98              32768 MB RAM,600 GB SSD,10.00 TB BW     16      32768   600     10.00           320.00
100             65536 MB RAM,700 GB SSD,15.00 TB BW     24      65536   700     15.00           640.00
115             8192 MB RAM,110 GB SSD,10.00 TB BW      2       8192    110     10.00           60.00
116             16384 MB RAM,110 GB SSD,20.00 TB BW     4       16384   110     20.00           120.00
117             24576 MB RAM,110 GB SSD,30.00 TB BW     6       24576   110     30.00           180.00
118             32768 MB RAM,110 GB SSD,40.00 TB BW     8       32768   110     40.00           240.00

file1.txt

http://mirror.rackspace.com/archlinux/iso/2016.01.01/archlinux-2016.01.01-dual.iso

file10.txt

mount /dev/vda3 /mnt
mkdir /mnt/{boot,etc}
mount /dev/vda1 /mnt/boot

file11.txt

# Generate the /etc/fstab
genfstab -p /mnt > /mnt/etc/fstab

file12.txt

cat -n /mnt/etc/fstab
     1  # UUID=0511c0d9-2e1a-47ea-bdaf-2ac0dd0f771b
     2  /dev/vda3               /               ext4            rw,relatime,data=ordered        0 1
     3
     4  # UUID=51b42fd0-e7d6-4795-b11c-cbf950cae57a
     5  /dev/vda1               /boot           ext4            rw,relatime,data=ordered        0 2
     6
     7  # UUID=d659fbc3-66e0-4a9c-b0c2-fb2134fdb477
     8  /dev/vda2               none            swap            defaults        0 0
     9

file13.txt

# Find the nearest mirror automatically
mkdir /mnt/etc/pacman.d

cat <<'MIRRORS' >/mnt/etc/pacman.d/mirrorlist
Server = http://ftp.tsukuba.wide.ad.jp/Linux/archlinux/$repo/os/$arch
Server = http://ftp.jaist.ac.jp/pub/Linux/ArchLinux/$repo/os/$arch
MIRRORS

# 自動で生成しても良いけど10分前後時間が掛かる
# rankmirrors -n 3 /run/archiso/sfs/airootfs/etc/pacman.d/mirrorlist >/mnt/etc/pacman.d/mirrorlist

file14.txt

# サーバ用途なので、頻繁に更新されるlinuxパッケージではなく、より更新が少ないlinux-ltsを入れます
pacstrap /mnt base sudo shadow openssh linux-lts

file15.txt

arch-chroot /mnt bash

file16.txt

# locale設定
echo en_US.UTF-8 UTF-8 >/etc/locale.gen
#echo ja_JP.UTF-8 UTF-8 >/etc/locale.gen

locale-gen
#Generating locales...
#  en_US.UTF-8... done
#Generation complete.

# 言語設定
echo "LANG=en_US.UTF-8" > /etc/locale.conf

file17.txt

echo vultr-server-01 > /etc/hostname

file18.txt

ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

file19.txt

ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 56:00:01:55:66:65 brd ff:ff:ff:ff:ff:ff

file2.txt

$ ping -w 3 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=54 time=9.49 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=54 time=9.68 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=54 time=9.51 ms

--- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 9.490/9.563/9.682/0.116 ms

$ nslookup gnu.org
Server:         108.61.10.10
Address:        108.61.10.10#53

Non-authoritative answer:
Name:   gnu.org
Address: 208.118.235.148

file20.txt

cd /etc/netctl
cp examples/ethernet-static ens3
nano ens3

file21.txt

netctl enable ens3
# ln -s '/etc/systemd/system/netctl@ens3.service' '/etc/systemd/system/multi-user.target.wants/netctl@ens3.service'

file22.txt

netctl enable ens3
# ln -s '/etc/systemd/system/netctl@ens3.service' '/etc/systemd/system/multi-user.target.wants/netctl@ens3.service'

file23.txt

cat <<TIME >>/etc/systemd/timesyncd.conf
NTP=asia.pool.ntp.org
FallbackNTP=0.arch.pool.ntp.org 1.arch.pool.ntp.org 2.arch.pool.ntp.org 3.arch.pool.ntp.org
TIME

timedatectl set-ntp true
timedatectl status|grep NTP
# NTP synchronized: yes

file24.txt

echo '%wheel ALL=(ALL) ALL' >> /etc/sudoers

file25.txt

# Setting up the boot loader
pacman -S grub --noconfirm

grub-install --recheck --target=i386-pc /dev/vda

grub-mkconfig -o /boot/grub/grub.cfg

# 結果
# Generating grub configuration file ...
# Found linux image: /boot/vmlinuz-linux-lts
# Found initrd image: /boot/initramfs-linux-lts.img
# Found fallback initramfs image: /boot/initramfs-linux-lts-fallback.img

file26.txt

useradd -m -g users -G wheel user01
# 初期パスワード追加
echo user01:password | chpasswd

file27.txt

curl -s https://github.com/<<ユーザー名>>.keys

# 例:
curl -s https://github.com/dseg.keys
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIAnJSEJG1MVYf2BrRSAWw+DhDvswo3Bv1g3MO+dCBoI

file28.txt

su - user01
[ -d ~/.ssh ] || mkdir ~/.ssh
curl -s https://github.com/<<ユーザー名>>.keys >> ~/.ssh/authorized_keys

file29.txt

sudo -i
F=/etc/ssh/sshd_config
# コメント行のPasswordAuthentication...は無視する
if [[ `grep -P '^(?<!#)PasswordAuthentication yes' "$F"` ]]; then
  sed -ie 's/^PasswordAuthentication yes/PasswordAuthentication no/g' "$F"
fi

file3.txt

echo root:root1234567890 | chpasswd

file30.txt

sudo -i
F=/etc/ssh/sshd_config
# コメント行のPasswordAuthentication...は無視する
if [[ `grep -P '^(?<!#)PasswordAuthentication yes' "$F"` ]]; then
  sed -ie 's/^PasswordAuthentication yes/PasswordAuthentication no/g' "$F"
fi

file31.txt

systemctl enable sshd

file32.txt

exit

# Unmound drives
umount /mnt/{boot,}

reboot

file33.txt

ssh user01@IPアドレス -i 秘密鍵ファイル

file34.txt

$ free -h
              total        used        free      shared  buff/cache   available
Mem:           745M         20M        666M        296K         58M        705M
Swap:          2.0G          0B        2.0G

file35.txt

sudo pacman -S base-devel

file36.txt

# /etc/pacman.conf の 末尾に追記
cat <<EOL | sudo tee -a /etc/pacman.conf

[archlinuxfr]
SigLevel = PackageOptional
Server = http://repo.archlinux.fr/\$arch
EOL

file37.txt

sudo  pacman --sync --refresh --noconfirm yaourt

file38.txt

yaourt -S --noconfirm nkf

file39.txt

# 不要パッケージ削除
sudo pacman -R linux --noconfirm
# pacmanのキャッシュ削除
sudo pacman -Sc --noconfirm

file4.txt

systemctl start sshd

file40.txt

sudo vi /etc/netctl/ens3
# AddressとGatewayの値を更新

file5.txt

ssh root@サーバのIPアドレス

file6.txt

parted /dev/vda --script mklabel msdos

file7.txt

# Make partitions
parted /dev/vda --align optimal\
 --script\
 mkpart primary ext4 2048s 128MB\
 unit MB\
 mkpart primary linux-swap 128MB 2GB\
 unit GB\
 mkpart primary 2GB 100%\
 set 1 boot on\
 align-check opt 1 align-check opt 3

file8.txt

parted /dev/vda p

Model: Virtio Block Device (virtblk)
Disk /dev/vda: 16.1GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type     File system     Flags
 1      1049kB  128MB   127MB   primary  ext4            boot
 2      128MB   2000MB  1872MB  primary  linux-swap(v1)
 3      2000MB  16.1GB  14.1GB  primary  ext4

file9.txt

# Format the partitions and mount it
mkswap /dev/vda2
swapon /dev/vda2
mkfs.ext4 /dev/vda1
mkfs.ext4 /dev/vda3

sshd_config

PasswordAuthentication no