# Ubuntu 安裝 R4.5 標準流程
## 前置作業
* Ubuntu 18.04 LTS 已安裝完畢並能遠端連線進入
* 當前帳號可以使用 sudo 指令

## 修復舊的 logrotate 的bug
```sh
$ curl http://gitlab.tp.rulingcom.com/erictyl/install_r45_on_ubuntu_1804lts_doc/-/raw/master/fix_logrotate.sh | sh
```

## 建立 rulingcom 帳號（若已是 rulingcom 帳號，前往下一步驟）
```sh
$ sudo su # 從當前帳號切換到 root
$ adduser rulingcom
$ # set the password for rulingcom
$ # fill in user information, it's ok to leave all blank
$ usermod -aG sudo rulingcom # 讓 rulingcom 可用 sudo
$ su - rulingcom
$ sudo ls -la /root # 測試 rulingcom sudo 是否可用
$ exit; exit # 第一次 exit 退回 root 帳號，第二次 exit 退回剛登入的帳號
```

## 下載裝機script並執行(除了需執行下一步驟的移機外，其他內容不用再執行)

```sh
$ wget http://gitlab.tp.rulingcom.com/erictyl/install_r45_on_ubuntu_1804lts_doc/-/raw/master/install_orbit_environment.sh -O install_orbit_environment.sh
$ source install_orbit_environment.sh #請使用要執行網站的user(須為具有sudo權限之帳號)來執行，執行後會需要輸入user密碼
## 以下其他內容均不需執行，可直接進行架站或移機
```

## 轉移網站資料 - 1 (把資訊不直接放在command line上，避免資訊存到log中)

```sh
$ wget http://gitlab.tp.rulingcom.com/erictyl/install_r45_on_ubuntu_1804lts_doc/-/raw/master/move_site_interactive.sh
$ bash -i move_site_interactive.sh
```

## 轉移網站資料 - 2 (把資訊放在command line)

```sh
$ wget http://gitlab.tp.rulingcom.com/erictyl/install_r45_on_ubuntu_1804lts_doc/-/raw/master/move_site.sh
# 請依照您的需求替換以下這行的變數成實際的值
$ bash -i move_site.sh $ip $port $user $remote_pass $domain $your_local_password
```

## 安裝libgmp(Ubuntu 14.04需要)

```sh
sudo apt install libgmp-dev ##此套件為nokogiri相依套件
```

## 安裝 Nginx 1.14

```sh
$ sudo apt update
$ sudo apt install nginx
$ nginx -v # 確認版本為 1.14
$ sudo systemctl status nginx # 查看 nginx 是否啟動
$ sudo systemctl restart nginx # 安全重啟 nginx，若已啟動則可跳過此步驟
$ cd /etc/nginx/
$ sudo mkdir orbit_sites/
$ sudo vim nginx.conf # add `include /etc/nginx/orbit_sites/*;` to Virtual Host Configs block
$ sudo vim orbit_sites/xxx_ooo # 建立網站 nginx 設定檔，xxx 為學校縮寫，ooo 為系所、單位縮寫。內容參考附註 nginx 設定檔
```
```nginx
# 此為附註 nginx 設定檔
# upstream xxx_sock {
upstream orbit_sock {
# server unix:/path/to/your/r45/tmp/unicorn.sock;
  server unix:/home/rulingcom/orbit_sites/orbit/tmp/unicorn.sock;
}

server {
  listen 80;

# root /path/to/your/r45/public;
  root /home/rulingcom/orbit_sites/orbit/public;

# server_name your.website.address;
  server_name localhost;

  client_max_body_size 500m;

  location / {
    try_files $uri $uri/index.html $uri.html @app;
  }

  location @app {
    proxy_redirect     off;
    proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header   Host              $http_host;
    proxy_connect_timeout   360;
#   proxy_pass http://xxx_sock;
    proxy_pass http://orbit_sock;
  }
}
```

## 安裝 MongoDB 3.2.22
```sh
$ # 匯入 MongoDB 公鑰到套件管理系統
$ wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0.0_1.0.2n-1ubuntu5.6_amd64.deb  #Ubuntu 20.04LTS
$ sudo dpkg -i libssl1.0.0_1.0.2n-1ubuntu5.6_amd64.deb  #Ubuntu 20.04LTS
$ wget -qO - https://www.mongodb.org/static/pgp/server-3.2.asc | sudo apt-key add -
$ # 建立 list file
$ echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list
$ sudo apt-get update # 更新套件管理系統
$ # 下載並安裝 MongoDB 3.2.22
$ sudo apt-get install -y mongodb-org=3.2.22 mongodb-org-server=3.2.22 mongodb-org-shell=3.2.22 mongodb-org-mongos=3.2.22 mongodb-org-tools=3.2.22
$ mongo --version # 查看 MongoDB 版本
$ sudo systemctl status mongod # 查看 MongoDB 是否啟動
$ sudo systemctl restart mongod # 安全啟動 MongoDB，若已啟動則可跳過此步驟
```

## 安裝 ImageMagick 6.9.7-4 (部份預設模組需要處理圖片，此為相依軟體)
```sh
$ sudo apt-get install libjpeg62
$ wget http://download.sourceforge.net/libpng/libpng-1.5.13.tar.gz
$ tar xvfz libpng-1.5.13.tar.gz
$ cd libpng-1.5.13/
$ ./configure
$ make
$ sudo make install
# 編譯jpeg套件
$ sudo apt install -y libltdl-dev graphviz libpng-dev libfftw3-dev
$ sudo apt-get install -y libjpeg-turbo8-dev
$ sudo apt install -y libgif-dev libjpeg-dev libopenexr-dev libpng-dev libwebp-dev
$ sudo apt install -y cmake pkg-config libbrotli-dev
# Build imagemagick
$ wget http://www.imagemagick.org/download/ImageMagick.tar.gz
$ tar xvfz ImageMagick.tar.gz
$ cd ImageMagick-7.1.0-16/ # cd ImageMagick-x.x.x-x(版本號)
$ ./configure --with-bzlib=yes --with-fontconfig=yes --with-freetype=yes --with-gslib=yes --with-gvc=yes --with-jpeg=yes --with-jp2=yes --with-png=yes --with-tiff=yes --disable-shared --with-modules
##在configure跑完後，可確認Delegates是否有jpeg png zlib(最後一行)
$ make
$ sudo make install
$ sudo ln -s /usr/local/lib/* /usr/lib/.
$ sudo ln -s /usr/local/lib/pkgconfig/* /usr/lib/pkgconfig/.
$ sudo ln -s /usr/local/bin/* /usr/bin/.
$ convert -list configure #確認為版本7.1.0.0以上
####以下為舊的imagemagick安裝方式(請不要使用，會有圖片上傳後，解碼失敗問題)
#$ sudo apt install imagemagick
#$ convert -version # 檢查是否安裝成功，並確認版本
#$ identify -version #檢查Delegates是否有jpeg png zlib
```

## Ubuntu 20.04 才需要的步驟

```sh
###安裝 libssl1.0-dev
$ sudo sh -c "echo 'deb http://security.ubuntu.com/ubuntu bionic-security main' >> /etc/apt/sources.list"
$ sudo apt update && apt-cache policy libssl1.0-dev
$ sudo apt-get install libssl1.0-dev
```

## 設定host IP(避免VM抓不到domain對應的IP)
```sh
# sudo vim /etc/hosts 加入以下內容
59.120.142.210 gitlab.tp.rulingcom.com
59.120.142.206 ruling.digital store.tp.rulingcom.com
151.101.1.227 index.rubygems.org rubygems.org
104.192.141.1 bitbucket.org
```
## 安裝 RVM (Ruby 版本和套件的管理程式)

```sh
$ sudo apt install gnupg2
$ gpg2 --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
$ \curl -sSL https://get.rvm.io | bash -s stable
$ source /home/rulingcom/.rvm/scripts/rvm
$ sudo vi /etc/apt/sources.list # Ubuntu 20.04LTS add `deb http://security.ubuntu.com/ubuntu bionic-security main`
$ rvm install 2.1.2
$ rvm install 2.1.10
$ rvm --default use 2.1.10
```
## 若以上安裝RVM失敗可用另一種方式安裝RVM和ruby

```sh
$ sudo apt-get install software-properties-common
$ sudo apt-add-repository -y ppa:rael-gc/rvm
$ sudo apt-get update
$ sudo apt-get install rvm
$ echo 'source "/etc/profile.d/rvm.sh"' >> ~/.bashrc
$ source "/etc/profile.d/rvm.sh"
$ rvm install 2.1.2
$ rvm install 2.1.10
$ rvm --default use 2.1.10
```
## 安裝screen
```sh
$ sudo apt-get install screen
```
## 安裝 R4.5
### 一、建立 ssh key pair
```sh
$ cd /home/rulingcom/.ssh # 如果沒有該資料夾則自行建立 `mkdir /home/rulingcom/.ssh`，接著進入 .ssh 資料夾
$ ssh-keygen # 設定 key pair name -> 設定密碼(不設定直接 enter) -> 確認密碼(不設定直接 enter)
$ cat ~/.ssh/your_key.pub # 將公鑰轉交給禾綸（注意：不是私鑰）
$ # 確認禾綸將公鑰加入 GitLab 後再接續下列指令與步驟二
$ eval "$(ssh-agent -s)"
$ ssh-add ~/.ssh/your_private_key
```

### 二、安裝 R4.5 Web App
```sh
$ git clone http://gitlab.tp.rulingcom.com/orbit_chiu1/orbit4-5.git your_site_name
$ cd your_site_name
$ vim config/mongoid.yml # 所有 orbit_4_5 換成 your_site_name, :wq 存檔離開
$ vim Gemfile # 加井字號註解掉 gem 'sassc-rails', '~>1.3.0' 並拿掉此行 #gem 'sass-rails', '~> 4.0.2' 井字號取消註解
$ gem install nokogiri -v 1.7.0.1 #For Ubuntu 20.04LTS
$ bundle install
$ RAILS_ENV=production bundle exec rake assets:precompile
$ bundle exec unicorn_rails -c config/unicorn.rb -D -E production
$ sudo service nginx restart
$ # Login the new create site with rulingcom account and choose “Admin Area” to complete the registration of this new created site.
```

## 開啟crontab的log(獨立顯示)
### Open the file
```sh
sudo vim /etc/rsyslog.d/50-default.conf
```
### Find the line that starts with: #cron.*
```sh

uncomment that line, save the file, and restart rsyslog:

sudo service rsyslog restart

You should now see a cron log file here:  /var/log/cron.log
```
## 設定備份（以備份一週內容為例）
### 一、資料庫備份
```sh
#### 安裝postfix，以避免NO MTA installed.
sudo apt-get install -y postfix
sudo service postfix start
$ sudo crontab -e
# 內容如下：
0 3 * * * mongodump -o /home/backup/db/`date "+\%Y\%m\%d"`_db
0 4 * * * rm -fr /home/backup/db/`date --date="1 week ago" "+\%Y\%m\%d"`_db
```

### 二、R4.5 網站目錄備份
```sh
# 安裝 rsnapshot，如已安裝則直接編輯 /etc/rsnapshot.conf
$ sudo apt-get install rsnapshot -y
$ sudo vim /etc/rsnapshot.conf # 內容建附註 rsnapshot
$ sudo mkdir /home/backup
$ sudo mkdir /home/backup/orbit
$ sudo chmod 777 /home/backup/orbit
$ rsnapshot -t daily # 測試是否設定正確
$ sudo crontab -e # 加入下行內容後，儲存退出

15 4 * * * /usr/bin/rsnapshot daily
```

```txt
# 此為附註 rsnapshot

# 注意！該檔使用 tab 而非 space！

# find BACKUP LEVELS /INTERVALS part
# at this part, remove every lines with `retain` and then add the line below:
retain	daily	7

# find SNAPSHOT ROOT DIRECTORY part
# modify the snapshot dir path
snapshot_root	/home/backup/orbit

# find BACKUP POINTS / SCRIPTS part
# add R4.5 site backup
backup	/home/rulingcom		localhost/
```

### 三、定期壓縮與刪除 log
```sh
$ sudo vim /etc/logrotate.d/orbit # 內容見附註 logrotate
$ sudo logrotate -d /etc/logrotate.conf # 確認系統是否有使用 /etc/logrotate.d/orbit
$ sudo /usr/sbin/logrotate -f /etc/logrotate.conf #測試執行log壓縮程序，看是否能成功壓縮log
```

```txt
# 附註 logrotate
/home/rulingcom/*/*/log/*.log {
  daily
  rotate 7
  compress
  missingok
  notifempty
  copytruncate
  postrotate
    [ ! -f /run/nginx.pid ] || kill -USR1 `cat /run/nginx.pid`
  endscript
}

/home/rulingcom/*/*/*/log/*.log {
  daily
  rotate 7
  compress
  missingok
  notifempty
  copytruncate
  postrotate
    [ ! -f /run/nginx.pid ] || kill -USR1 `cat /run/nginx.pid`
  endscript
}


/var/log/mongodb/*.log {
  daily
  rotate 7
  compress
  missingok
  notifempty
  create 644 mongodb mongodb
  postrotate
    [ ! -f /var/lib/mongodb/mongod.lock ] || kill -USR1 `cat /var/lib/mongodb/mongod.lock`
  endscript
}

```

### 四、主機開機網站自動起始
```sh
# 開機網站自動起始
$ sudo vim /etc/init.d/orbit # 內容見附註 orbit
$ sudo chmod 755 /etc/init.d/orbit
$ update-rc.d orbit defaults
$ sudo systemctl start orbit
$ sudo systemctl enable mongod.service #ubuntu18.04以上適用(可在系統boot時，自動開啟mongo)
$ sudo mv /etc/init.d/mongod /etc/systemd/system/ && sudo systemctl enable mongod.service
$ sudo crontab -e #加入以下#內容
# @reboot /bin/bash -l -c "rm -f /tmp/mongodb-27017.sock && chown mongodb:mongodb /var/lib/mongodb/ -R && chown mongodb:mongodb /var/log/mongodb -R && /usr/sbin/service mongod restart && /etc/init.d/orbit restart"
```

```txt
# 附註 orbit
底下#!/bin/bash請務必要加
#!/bin/bash
### BEGIN INIT INFO
# Provides:     ruling.digital
# Required-Start:       $network
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start orbit daemon at boot time
# Description:       Start orbit daemon at boot time
### END INIT INFO
ORBIT_USER=rulingcom

if [ -f "/home/$ORBIT_USER/.rvm/scripts/rvm" ]; then
    source /home/$ORBIT_USER/.rvm/scripts/rvm
    rvm use default
else
    if  [ -f "/etc/profile.d/rvm.sh" ]; then
        source /etc/profile.d/rvm.sh
    elif [ "$1" != "setup" ]; then
        echo ""
        echo "-----------------------------------------------------"
        echo "Orbit server dependencies is missing. Please run setup first."
        echo "command:    service orbit setup"
        echo "-----------------------------------------------------"
        echo ""
        exit 0;
    fi
fi

ORBIT_SITES=`pwd`
ORBIT_GIT=http://gitlab.tp.rulingcom.com/saurabh/orbit4-5.git
NGINX_ORBIT_SITES=/etc/nginx/orbit_sites

RAILS_ENV=production

sig () {
    test -s "$ORBIT_ROOT/tmp/pids/unicorn.pid" && kill -$1 `cat $ORBIT_ROOT/tmp/pids/unicorn.pid`
}

get_orbit_root () {
    if [ ! -f $NGINX_ORBIT_SITES/$1 ]; then echo "Site $1 not found" && exit 0; fi
    ORBIT_ROOT=`cat $NGINX_ORBIT_SITES/$1 | grep 'root'   | grep -v '#' | xargs | awk '{print $2}'`;
    ORBIT_ROOT=${ORBIT_ROOT//"/public;"/""};
    if [ ! -d $ORBIT_ROOT ]; then echo "Site folder $ORBIT_ROOT not fount"; fi
}

start_orbit () {
    sig 0 $ORBIT_ROOT && echo >&2 "$ORBIT_ROOT Already running";
    echo "Starting $ORBIT_ROOT";
    sudo su -l $ORBIT_USER -c "cd $ORBIT_ROOT && bundle exec unicorn_rails -D -E $RAILS_ENV -c config/unicorn.rb";
}

case $1 in
start)
    if [ ! -z "$2" ]; then
        get_orbit_root $2
        start_orbit
    else
        for APP in `ls -1 $NGINX_ORBIT_SITES`; do
          get_orbit_root $APP;
          start_orbit;
        done
    fi

    exit 0;
    ;;
stop)
    while [ `whoami` != "root" ]; do
        if [ ! -z "$2" ]; then
            read -p "Stop Orbit $2? (y/n)  " CONFIRM
        else
            read -p "Stop All Orbits? (y/n)  " CONFIRM
        fi
        case "$CONFIRM" in
            y|Y ) break;;
            n|N ) exit 0;;
            * ) echo "(y/n)";;
        esac
    done
    if [ ! -z "$2" ]; then
        get_orbit_root $2
        echo "Stopping $ORBIT_ROOT"
        sig QUIT
    else
        for APP in `ls -1 $NGINX_ORBIT_SITES`; do
          get_orbit_root $APP;
          echo "Stopping $ORBIT_ROOT";
          sig QUIT && continue;
        done
    fi
    exit 0;
    ;;
force-stop)
    while true; do
        if [ ! -z "$2" ]; then
            read -p "Stop Orbit $2? (y/n)  " CONFIRM
        else
            read -p "Stop All Orbits? (y/n)  " CONFIRM
        fi
        case "$CONFIRM" in
            y|Y ) break;;
            n|N ) exit 0;;
            * ) echo "(y/n)";;
        esac
    done
    if [ ! -z "$2" ]; then
        get_orbit_root $2
        echo "Stopping $ORBIT_ROOT"
        sig TERM
    else
        for APP in `ls -1 $NGINX_ORBIT_SITES`; do
          get_orbit_root $APP;
          echo "Stopping $ORBIT_ROOT";
          sig TERM && continue;
        done
    fi
    exit 0;
    ;;
restart|reload)
    if [ ! -z "$2" ]; then
        get_orbit_root $2
        sig USR2 && echo "$ORBIT_ROOT reloaded OK" && exit 0
        echo >&2 "Couldn't reload $ORBIT_ROOT, starting instead"
        start_orbit
    else
        for APP in `ls -1 $NGINX_ORBIT_SITES`; do
          get_orbit_root $APP;
          sig USR2 && echo "$ORBIT_ROOT reloaded OK" && continue;
          echo >&2 "Couldn't reload $ORBIT_ROOT, starting instead";
          start_orbit;
        done
    fi
    exit 0;
    ;;
create)
    if [ "$0" == "/etc/init.d/orbit" ]; then
        echo "Don't use service to create."
        echo "Use:  orbit create $2"
        exit 0
    fi
    test -s "$NGINX_ORBIT_SITES/$2" && echo "Site $2 already exist." && exit 0
    test -s "$ORBIT_SITES/$2" && echo "File $ORBIT_SITES/$2 already exist." && exit 0

    while true; do
      read -p "nginx server name: " SERVER_NAME
      if [ ! -z "$SERVER_NAME" ]; then break; fi
    done

    while true; do
      read -p "port number: " PORT
      if [ ! -z "$PORT" ]; then break; fi
    done

    while true; do
      read -p "database name: " DATABASE
      if [ ! -z "$DATABASE" ]; then break; fi
    done

    echo "-----------------------------------------------------"
    echo "Path: $ORBIT_SITES/$2"
    echo "Database: $DATABASE"
    echo http://$SERVER_NAME:$PORT
    echo "-----------------------------------------------------"

    while true; do
        read -p "Create Orbit $2? (y/n)  " CONFIRM
        case "$CONFIRM" in
            y|Y ) break;;
            n|N ) exit 0;;
            * ) echo "(y/n)";;
        esac
    done

    cd ~
    sudo wget http://installer.tp.rulingcom.com/nginx4-5.conf
    sudo cp nginx4-5.conf $NGINX_ORBIT_SITES/$2
    sudo rm nginx4-5.conf
    sudo perl -pi -e "s/{{ORBIT}}/$2/g" $NGINX_ORBIT_SITES/$2
    sudo perl -pi -e "s#{{ORBIT_SITES}}#${ORBIT_SITES}#g" $NGINX_ORBIT_SITES/$2
    sudo perl -pi -e "s/{{PORT}}/$PORT/g" $NGINX_ORBIT_SITES/$2
    sudo perl -pi -e "s/{{SERVER_NAME}}/$SERVER_NAME/g" $NGINX_ORBIT_SITES/$2
    sudo service nginx reload

    sudo su -l $ORBIT_USER -c "cd $ORBIT_SITES && git clone $ORBIT_GIT $2 && cd $2 && bundle"
    sudo su -l $ORBIT_USER -c "cd $ORBIT_SITES/$2 && perl -pi -e \"s/orbit_4_5/$DATABASE/g\" config/mongoid.yml"
    sudo su -l $ORBIT_USER -c "cd $ORBIT_SITES/$2 && bundle exec rake assets:precompile RAILS_ENV=production"
    sudo su -l $ORBIT_USER -c "cd $ORBIT_SITES/$2 && bundle exec unicorn_rails -D -E $RAILS_ENV -c $ORBIT_SITES/$2/config/unicorn.rb"
    sudo su -l $ORBIT_USER -c "cd $ORBIT_SITES/$2 && bundle exec rake orbit_cron:install"

    echo "-----------------------------------------------------"
    echo "$2 is ready"
    echo "Path: $ORBIT_SITES/$2"
    echo http://`ifconfig eth0 2>/dev/null|awk '/inet addr:/ {print $2}'|sed 's/addr://'`:$PORT
    echo "-----------------------------------------------------"

    exit 0
    ;;
setup)
    sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
    sudo echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list

    sudo apt-get update
    sudo apt-get -y upgrade
    sudo apt-get install -y nginx git-core mongodb-org imagemagick curl openssh-server nano

    sudo mkdir $NGINX_ORBIT_SITES
    sudo perl -pi -e "s/sites-enabled/orbit_sites/g" /etc/nginx/nginx.conf
    sudo rm -r /etc/nginx/sites-*

    sudo apt-get --no-install-recommends --yes install gawk g++ gcc make libc6-dev libreadline6-dev zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 autoconf libgdbm-dev libncurses5-dev automake libtool bison pkg-config libffi-dev

    sudo su -l $ORBIT_USER -c "\curl -sSL https://get.rvm.io | bash -s stable"
    sudo su -l $ORBIT_USER -c "rvm install 2.1 --default"
    echo "gem: --no-ri --no-rdoc" > /home/$ORBIT_USER/.gemrc
    source /home/$ORBIT_USER/.rvm/scripts/rvm

    echo ""
    echo "-----------------------------------------------------"
    echo "System is ready. You can start creating Orbit servers."
    echo "command:    orbit create Orbit_Folder_Name"
    echo "-----------------------------------------------------"
    echo ""
    exit 0
    ;;
*)
    echo >&2 "Usage $0 <start|stop|restart|force-stop|create|setup>"
    exit 1
    ;;
esac
```

```

### 五、網路設定
​```sh
# 開機網站自動起始
$ sudo vim /etc/netplan/50-cloud-init.yaml # 內容見附註 50-cloud-init.yaml 18.04開始設定改這
# $ sudo vim /etc/netplan/00-installer-config.yaml  # Ubuntu 20.04LTS
# 
```

```txt
# 50-cloud-init.yaml
# 本範例有兩塊網卡，第一塊是DHCP，第二塊是固定IP
# 其中因為子網路遮罩為255.255.255.0 ，所以是 /24
# This file is generated from information provided by the datasource.  Changes
# to it will not persist across an instance reboot.  To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s29u1u1u5:
            dhcp4: true
        enp6s0:
            addresses:
            - 192.168.1.142/24
            gateway4: 192.168.1.1
            nameservers:
                addresses:
                - 8.8.8.8
                search:
                - rulingcom.com
    version: 2
## 六、如果 /etc/init.d/mongod 遺失(適用於ubuntu14.04以上)
​```sh
# 建立 mongod service
$ sudo vim /etc/init.d/mongod  #請查看以下/etc/init.d/mongod之內容
$ sudo chmod +x /etc/init.d/mongod
```

```txt
#此為/etc/init.d/mongod之內容
#!/bin/bash
case $1 in 
start)
	if [ -f "/var/lib/mongodb/mongod.lock" ]; then
		exit 0
	else
		self_pid=$$
		pid=`ps aux | grep mongod | grep -v 'service' | grep -v 'grep' | grep -v '/etc/init.d' | awk '{print $2}'`;
		COUNTER=0
		for i in $pid
		do
			if [ -f "/proc/$i/status" ]; then
				echo "$i"  >> /var/lib/mongodb/mongod.lock;
				COUNTER=$((COUNTER+1))
			fi
		done
		if [ $COUNTER == 0 ]; then
			echo "starting mongo."
			sudo mongod --config /etc/mongod.conf &
			exit 0
		else
			echo "mongo is already running."
		fi
	fi
	;;
stop)
	echo "stoping mongo."
	if [ -f "/var/lib/mongodb/mongod.lock" ]; then
		sudo kill -s TERM `cat /var/lib/mongodb/mongod.lock`
		sudo rm -f /var/lib/mongodb/mongod.lock
	else
		pid=`ps aux | grep mongod | grep -v 'service' | grep -v 'grep' | grep -v '/etc/init.d' | awk '{print $2}'`;
		for i in $pid
		do
			kill -s TERM $i
		done
	fi
	;;
restart|reload)
	echo "stoping mongo."
	if [ -f "/var/lib/mongodb/mongod.lock" ]; then
		sudo kill -s TERM `cat /var/lib/mongodb/mongod.lock`
		sudo rm -f /var/lib/mongodb/mongod.lock
	else
		pid=`ps aux | grep mongod | grep -v 'service' | grep -v 'grep' | grep -v '/etc/init.d' | awk '{print $2}'`;
		for i in $pid
		do
			kill -s TERM $i
		done
	fi
	sudo mongod --config /etc/mongod.conf &
	exit 0
	;;
status)
	if [ -f "/var/lib/mongodb/mongod.lock" ]; then
		pid=`cat /var/lib/mongodb/mongod.lock`
		COUNTER=0
		ERRORPID=0
		for i in $pid
		do
			if [ -f "/proc/$i/status" ]; then
				COUNTER=$((COUNTER+1))
			else
				ERRORPID=1
			fi
		done
		if [ $ERRORPID == 0 ] && [ $COUNTER != 0 ]; then
			echo "mongo is already running"
		else		
			COUNTER=0
			pid=`ps aux | grep mongod | grep -v 'service' | grep -v 'grep' | grep -v '/etc/init.d' | awk '{print $2}'`;
			cat /dev/null  > /var/lib/mongodb/mongod.lock;
			for i in $pid
			do
				if [ -f "/proc/$i/status" ]; then
					echo "$i"  >> /var/lib/mongodb/mongod.lock;
					COUNTER=$((COUNTER+1))
				fi
			done
			if [ $COUNTER == 0 ]; then
				echo "mongo is not running."
			else
				echo "mongo is already running."
			fi
		fi
	else
		COUNTER=0
		pid=`ps aux | grep mongod | grep -v 'service' | grep -v 'grep' | grep -v '/etc/init.d' | awk '{print $2}'`;
		for i in $pid
		do
			if [ -f "/proc/$i/status" ]; then
				echo "$i"  >> /var/lib/mongodb/mongod.lock;
				COUNTER=$((COUNTER+1))
			fi
		done
		if [ $COUNTER == 0 ]; then
			echo "mongo is not running."
		else
			echo "mongo is already running."
		fi
	fi
esac
```