sentry是一個強大的分布式報錯信息收集平臺，圖形化程度很高，可以幫助我們直觀的發現當前部署的系統存在哪些問題。

二、安裝方式介紹

官網鏈接：https://docs.sentry.io/

官方提供了兩種安裝方式：Docker 和 python

註：我這裏選擇使用Docker 的方式來進行安裝配置sentry，原因是官網說了python這種方式已經被Docker安裝方式代替了，原話如下：

This method of installation is deprecated in favor of Docker

而且使用python安裝sentry必須是python 2.7 以及以上版本，考慮到升級python 會影響系統其它應用，故此選擇Docker的安裝方式。

三、安裝配置過程

1、準備工作

在服務器安裝好Centos 7.x 系統，我這裏安裝的是Centos 7.0 ，而且python在Centos 7.0上的版本就是2.7.5

2、安裝docker

官方Docker 安裝方式幫助文檔：

https://docs.sentry.io/server/installation/docker/

安裝docker
#yum install docker -y

查看版本信息
#docker info                #版本是1.12.6
Containers: 8
 Running: 8
 Paused: 0
 Stopped: 0
Images: 9
Server Version: 1.12.6
Storage Driver: devicemapper
 Pool Name: docker-8:2-263372-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 1.391 GB
 Data Space Total: 107.4 GB
 Data Space Available: 45.57 GB
 Metadata Space Used: 3.994 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.143 GB
 Thin Pool Minimum Free Space: 10.74 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: true
 Deferred Deletion Enabled: true
 Deferred Deleted Device Count: 0
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.140-RHEL7 (2017-05-03)
Logging Driver: journald
Cgroup Driver: systemd
Plugins:
 Volume: local
 Network: null host overlay bridge
Swarm: inactive
Runtimes: docker-runc runc
Default Runtime: docker-runc
Security Options: seccomp
Kernel Version: 3.10.0-693.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 3
CPUs: 2
Total Memory: 1.781 GiB
Name: localhost.localdomain
ID: 2C6S:WONB:UT5C:3RU7:UQKC:7CIU:HOQ6:XFXI:JE2M:LIMX:5B4S:FGLE
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Insecure Registries:
 127.0.0.0/8
Registries: docker.io (secure)

安裝epel源
#yum  install epel-release -y

安裝pip
#yum install python-pip -y
查看版本：
#pip -V
pip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)

3、安裝docker-compose

Docker Compose 是在使用Docker容器部署分布式應用時的工具，可以定義哪個容器運行哪個應用，使用Compose 你只需定義一個多容器應用的yml文件，然後使用一條命令即可部署運行所有容器。

參考鏈接：http://dockone.io/article/834

中文指南網：http://www.widuu.com/docker/compose/install.html

使用pip來安裝docker compose
#pip install docker-compose

#pip list     #可以看到docker-compose 已經安裝好了
backports.ssl-match-hostname (3.5.0.1)
cached-property (1.3.1)
certifi (2017.11.5)
chardet (3.0.4)
configobj (4.7.2)
decorator (3.4.0)
docker (2.6.1)
docker-compose (1.18.0)    #已安裝
………………

#docker-compose  --version   #查看版本
docker-compose version 1.18.0, build 8dd22a9

4、配置安裝屬於自己的sentry

#mkdir /opt/case -pv
#cd /opt/case/
#git clone https://github.com/getsentry/onpremise.git
#cd onpremise

根據onpremise目錄中的README.md 內容來操作：
#cat README.md 
………………
1. `mkdir -p data/{sentry,postgres}` - Make our local database and sentry config directories.
    This directory is bind-mounted with postgres so you don't lose state!
2. `docker-compose run --rm web config generate-secret-key` - Generate a secret key.
    Add it to `docker-compose.yml` in `base` as `SENTRY_SECRET_KEY`.
3. `docker-compose run --rm web upgrade` - Build the database.
    Use the interactive prompts to create a user account.
4. `docker-compose up -d` - Lift all services (detached/background mode).
5. Access your instance at `localhost:9000`!  
………………

#mkdir data/{sentry,postgres} -p

啟動docker
#systemctl start  docker
加入開機自啟動
#systemctl enable docker

正常啟動之後，會有docker0網卡生成
#ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 0.0.0.0
        ether 02:42:2a:d3:14:d4  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        
在docker-compose.yml中的base位置添加 SENTRY_SECRET_KEY，使用如下命令生成
#docker-compose run --rm web config generate-secret-key        #需要很長時間，需要到外網拉取數據，如果中間斷掉了，繼續執行即可。
Creating network "onpremise_default" with the default driver
Pulling postgres (postgres:9.5)...
Trying to pull repository docker.io/library/postgres ... 
9.5: Pulling from docker.io/library/postgres
f49cf87b52c1: Downloading [=======>                                           ] 8.109 MB/52.6 MB
67d44cf86769: Download complete
f16a15c53831: Download complete
f49cf87b52c1: Downloading [============>                                      ] 12.98 MB/52.6 MB
c9a1ed29c8a8: Download complete
8862935f78c7: Download complete
f49cf87b52c1: Downloading [=====================>                             ] 22.17 MB/52.6 MB
8c59731cd856: Download complete
12acb5363ee2: Download complete
f49cf87b52c1: Downloading [======================>                            ] 23.25 MB/52.6 MB
8397eb589621: Download complete
d3041f255f7a: Download complete

註：如果第一次沒有生成SENTRY_SECRET_KEY，多執行幾次直到生成為止，我就執行了4次，如下：
#docker-compose run --rm web config generate-secret-key
Starting onpremise_memcached_1 ... 
Starting onpremise_redis_1 ... 
Starting onpremise_memcached_1 ... done
Starting onpremise_smtp_1 ... done
_&vh6fx-80!q20g+jhvj5m6(!(-jy^x7t46_-7vtz2(=)+=#%v

將上面命令執行結束後生成的最後一行字符串，添加到docker-compose.yml 中，如下：
#cat docker-compose.yml
…………………………
version: '2'
services:
  base:
    restart: unless-stopped
    build: .
    environment:
      # Run `docker-compose run web config generate-secret-key`
      # to get the SENTRY_SECRET_KEY value.
      # SENTRY_SECRET_KEY: ''
      SENTRY_SECRET_KEY: '_&vh6fx-80!q20g+jhvj5m6(!(-jy^x7t46_-7vtz2(=)+=#%v'     #添加此行
      SENTRY_MEMCACHED_HOST: memcached
      SENTRY_REDIS_HOST: redis
      SENTRY_POSTGRES_HOST: postgres
      SENTRY_EMAIL_HOST: smtp
    volumes:
      - ./data/sentry:/var/lib/sentry/files
……………………

查看鏡像
#docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
onpremise_web            latest              4178dbde130d        16 minutes ago      535.6 MB
docker.io/tianon/exim4   latest              f0e5295455c1        7 days ago          173.2 MB
docker.io/sentry         8.22-onbuild        6f77c810f869        7 days ago          535.5 MB
docker.io/postgres       9.5                 cea87be7b432        7 days ago          263.9 MB
docker.io/redis          3.2-alpine          f60c2c2ed490        2 weeks ago         19.81 MB
docker.io/memcached      1.4                 bdb0ceca47d8        5 months ago        58.6 MB

繼續執行
Use the interactive prompts to create a user account
#docker-compose run --rm web upgrade      #Build the database. 

………………

Would you like to create a user account now? [Y/n]: y  #輸入y 表示創建用戶賬號
Email: [email protected]                                     #輸入一個郵箱地址
Password:                                              #輸入密碼
Repeat for confirmation:                               #確認密碼
Should this user be a superuser? [y/N]: y              #詢問是否是超級用戶，輸入y
User created: [email protected]
Added to organization: sentry
 - Loading initial data for sentry.
Installed 0 object(s) from 0 fixture(s)
Running migrations for nodestore:
 - Migrating forwards to 0001_initial.
 > nodestore:0001_initial
 - Loading initial data for nodestore.
Installed 0 object(s) from 0 fixture(s)
Running migrations for search:
 - Migrating forwards to 0002_auto__del_searchtoken__del_unique_searchtoken_document_field_token__de.
 > search:0001_initial
 > search:0002_auto__del_searchtoken__del_unique_searchtoken_document_field_token__de
 - Loading initial data for search.
Installed 0 object(s) from 0 fixture(s)
Running migrations for social_auth:
 - Migrating forwards to 0004_auto__del_unique_usersocialauth_provider_uid__add_unique_usersocialaut.
 > social_auth:0001_initial
 > social_auth:0002_auto__add_unique_nonce_timestamp_salt_server_url__add_unique_associati
 > social_auth:0003_auto__del_nonce__del_unique_nonce_server_url_timestamp_salt__del_assoc
 > social_auth:0004_auto__del_unique_usersocialauth_provider_uid__add_unique_usersocialaut
…………………… 

註：在執行下面一步的時候，需要關閉selinux並且配置docker-compose.yml，否則如果後面再關閉selinux，就會遇到啟動報錯，後面會介紹！
#cat  /etc/selinux/config 
SELINUX=disabled           #改成disabled
在docker-compose.yml 中添加選項：privileged: true 如下樣式：
#cat docker-compose.yml 
………………
version: '2'
services:
  base:
    privileged: true                    #添加到這個位置
    restart: unless-stopped
    build: .
    environment:
      # Run `docker-compose run web config generate-secret-key`
      # to get the SENTRY_SECRET_KEY value.
      # SENTRY_SECRET_KEY: ''
      SENTRY_SECRET_KEY: '_&vh6fx-80!q20g+jhvj5m6(!(-jy^x7t46_-7vtz2(=)+=#%v'
      SENTRY_MEMCACHED_HOST: memcached
      SENTRY_REDIS_HOST: redis
      SENTRY_POSTGRES_HOST: postgres
      SENTRY_EMAIL_HOST: smtp
    volumes:
      - ./data/sentry:/var/lib/sentry/files

  smtp:
    privileged: true                    #添加到這個位置
    restart: unless-stopped
    image: tianon/exim4

  memcached:
    privileged: true                    #添加到這位置，下面的服務也是添加到同樣的位置，不在列出
    restart: unless-stopped
    image: memcached:1.4
………………

然後重啟系統
#reboot

#docker-compose up -d          #拉起所有的服務    Lift all services (detached/background mode).
creating onpremise_smtp_1 ... 
creating onpremise_postgres_1 ... 
creating onpremise_memcached_1 ... 
creating onpremise_redis_1 ... 
creating onpremise_postgres_1 ... done
creating onpremise_web_1 ... 
creating onpremise_cron_1 ... 
creating onpremise_worker_1 ... done

再次執行#docker images 就會多出來幾個：
#docker images 
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
onpremise_base           latest              4178dbde130d        About an hour ago   535.6 MB
onpremise_cron           latest              4178dbde130d        About an hour ago   535.6 MB
onpremise_web            latest              4178dbde130d        About an hour ago   535.6 MB
onpremise_worker         latest              4178dbde130d        About an hour ago   535.6 MB
docker.io/tianon/exim4   latest              f0e5295455c1        7 days ago          173.2 MB
docker.io/sentry         8.22-onbuild        6f77c810f869        7 days ago          535.5 MB
docker.io/postgres       9.5                 cea87be7b432        8 days ago          263.9 MB
docker.io/redis          3.2-alpine          f60c2c2ed490        2 weeks ago         19.81 MB
docker.io/memcached      1.4                 bdb0ceca47d8        5 months ago        58.6 MB

#docker-compose images
      Container               Repository            Tag         Image Id      Size  
------------------------------------------------------------------------------------
onpremise_base_1        onpremise_base           latest       4178dbde130d   511 MB 
onpremise_cron_1        onpremise_base           latest       4178dbde130d   511 MB 
onpremise_memcached_1   docker.io/memcached      1.4          bdb0ceca47d8   55.9 MB
onpremise_postgres_1    docker.io/postgres       9.5          cea87be7b432   252 MB 
onpremise_redis_1       docker.io/redis          3.2-alpine   f60c2c2ed490   18.9 MB
onpremise_smtp_1        docker.io/tianon/exim4   latest       f0e5295455c1   165 MB 
onpremise_web_1         onpremise_base           latest       4178dbde130d   511 MB 
onpremise_worker_1      onpremise_base           latest       4178dbde130d   511 MB 

使用docker-compose 管理服務
#cd /opt/case/onpremise
#docker-compose start  #將上面的服務全部啟動
Starting postgres  ... done
Starting redis     ... done
Starting smtp      ... done
Starting base      ... done
Starting memcached ... done
Starting worker    ... done
Starting cron      ... done
Starting web       ... done

#docker-compose ps     #查看是否啟動ok，可以看到都是Up狀態

        Name                       Command               State           Ports         
---------------------------------------------------------------------------------------
onpremise_base_1        /entrypoint.sh run web           Up      9000/tcp              
onpremise_cron_1        /entrypoint.sh run cron          Up      9000/tcp              
onpremise_memcached_1   docker-entrypoint.sh memcached   Up      11211/tcp             
onpremise_postgres_1    docker-entrypoint.sh postgres    Up      5432/tcp              
onpremise_redis_1       docker-entrypoint.sh redis ...   Up      6379/tcp              
onpremise_smtp_1        entrypoint.sh tini -- exim ...   Up      25/tcp                
onpremise_web_1         /entrypoint.sh run web           Up      0.0.0.0:9000->9000/tcp
onpremise_worker_1      /entrypoint.sh run worker        Up      9000/tcp       

Access your instance at `localhost:9000`! 即配置訪問實例的ip和端口
#vi docker-compose.yml   #在web 配置項添加如下：
  web:
    privileged: true
    restart: unless-stopped
    extends: base
    links:
      - redis
      - postgres
      - memcached
      - smtp
    ports:
      - '172.16.60.167:9000:9000'    #添加sentry所在服務器的ip地址

然後就可以在瀏覽器訪問了http://172.16.60.167:900  輸入上面設置的用戶名和密碼，就可以進入，如下圖

第一次登陸需要進行一些簡單的設置，點擊“登陸”之後，出現如下界面，進行一些設置

設置好之後，直接點擊右下角的“continue” 就會進入到主機面，如下：

至此sentry的安裝配置告一段落，具體創建項目或者其他操作需要根據開發需要進行配置。

四、遇到的問題

1、執行docker-compose  start 報錯
問題描述：
按照/opt/case/onpremise/README.md 中的1-5 操作之後，準備將selinux關閉，於是就在配置文件/etc/selinux/config中將參數改了---> SELINUX=disabled 重啟
系統之後，再次執行#docker-compose  start 報錯 如下：
Starting postgres  ... error
Starting redis     ... error
Starting smtp      ... error
Starting base      ... error
Starting memcached ... error
Starting worker    ... error
Starting cron      ... error
Starting web       ... error

ERROR: for memcached  Cannot start service memcached: devmapper: Error mounting '/dev/mapper/docker-8:2-263372-b60cf0da925b9971fb7103e576b9e0f088451e8203ebb07ebadff4adaee2fb4e' on '/var/lib/docker/devicemapper/mnt/b60cf0da925b9971fb7103e576b9e0f088451e8203ebb07ebadff4adaee2fb4e': invalid argument
ERROR: for redis  Cannot start service redis: devmapper: Error mounting '/dev/mapper/docker-8:2-263372-eb1a216ef329502e65c8b9157e6cbff34bfcdc31f5fdc24e7450438498ea0e66' on '/var/lib/docker/devicemapper/mnt/eb1a216ef329502e65c8b9157e6cbff34bfcdc31f5fdc24e7450438498ea0e66': invalid argument
ERROR: for smtp  Cannot start service smtp: devmapper: Error mounting '/dev/mapper/docker-8:2-263372-501013d66a63bfb0e331ee1e3d7924ceddfc5117a0eb13673cdc03c6ba629da0' on '/var/lib/docker/devicemapper/mnt/501013d66a63bfb0e331ee1e3d7924ceddfc5117a0eb13673cdc03c6ba629da0': invalid argument
ERROR: for postgres  Cannot start service postgres: devmapper: Error mounting '/dev/mapper/docker-8:2-263372-ae89295b83428fe62bc53536f02be7a65a3648b3f4ed8335023cfb30156f79a7' on '/var/lib/docker/devicemapper/mnt/ae89295b83428fe62bc53536f02be7a65a3648b3f4ed8335023cfb30156f79a7': invalid argument
ERROR: for base  Cannot start service base: devmapper: Error mounting '/dev/mapper/docker-8:2-263372-e46af50ff165debb34ede80daf1c2853ec0f3ee39c0aeb6121c786a56942ca1c' on '/var/lib/docker/devicemapper/mnt/e46af50ff165debb34ede80daf1c2853ec0f3ee39c0aeb6121c786a56942ca1c': invalid argument
ERROR: No containers to start
網上找了一些方法，但是不能解決問題，其中一個就是執行umount命令，如下
#umount /var/lib/docker/devicemapper/mnt/xxxx

後來在高人的指點下，說是selinux的問題。因為我是在配置SELINUX=disabled 之前執行的#docker-compose up -d  

解決方法:
1、將selinux配置文件中的配置還原：SELINUX=enforcing  然後reboot系統，執行#docker-compose start 就可以正常啟動了。
2、在/opt/case/onpremise/docker-compose.yml  中添加一個配置項：privileged: true
如下：
  smtp:
    privileged: true            ##在每一個服務下面都要添加這個選項，一共8個
    restart: unless-stopped
    image: tianon/exim4

重啟系統
#reboot

3、再將selinux 配置文件中改為disabled  
SELINUX=disabled

4、執行docker-compose up
#docker-compose up -d              #會重新創建服務
Recreating onpremise_smtp_1 ... 
Recreating onpremise_postgres_1 ... 
Recreating onpremise_memcached_1 ... 
Recreating onpremise_redis_1 ... 
Recreating onpremise_postgres_1 ... done
Recreating onpremise_web_1 ... 
Recreating onpremise_cron_1 ... 
Recreating onpremise_worker_1 ... done

5、啟動
#docker-compose start
Starting postgres  ... done
Starting redis     ... done
Starting smtp      ... done
Starting base      ... done
Starting memcached ... done
Starting worker    ... done
Starting cron      ... done
Starting web       ... done

註：後面再reboot之後，就不會出現執行docker-compose start 報錯的問題了。

不足之處，請多多指教！

使用Docker 方式在Centos 7.0 安裝配置Sentry