# 雲端通訊整合實務(11/03)
###### tags: `docker`
## gitlab應用2
下載gitlab-cicd：
```
git clone https://github.com/yangshun2005/gitlab-cicd.git
```
安裝完之後，進入到`gitlab-cicd/testgolang`資料夾下，並執行：
```
docker build -t testgo:1.0 .
```
完成後可以透過`docker images`來查看鏡像：
```
root@vm2:~/gitlab-cicd/testgolang# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
testgo 1.0 405137fa7a3c 4 seconds ago 845MB
golang latest 8e2ffcb73e11 7 hours ago 839MB
iris 1.0 69efff386461 20 hours ago 922MB
k8s.gcr.io/kube-proxy v1.19.4 635b36f4d89f 3 weeks ago 118MB
k8s.gcr.io/pause 3.2 80d28bedfe5d 9 months ago 683kB
nitincypher/docker-ubuntu-python-pip latest a6659c7f1508 2 years ago 922MB
```
啟動testgo容器：
```
docker run -d -p 8001:8001 testgo:1.0
```
```
root@vm2:~/gitlab-cicd/testgolang# docker run -d -p 8001:8001 testgo:1.0
375421dbdf31d245c191c9d2bc381a90619e8943eabd650e0a852218fed371ec
```
接下來可以做個測試，來測試容器是否可執行：
```
curl 127.0.0.1:8001/hello
```
結果若長這樣就代表成功了：
```
root@vm2:~/gitlab-cicd/testgolang# curl 192.168.102.138:8001/hello
hello chinaase willim ,I running in docker-container and buit by gitlabroot@vm2:~/gitlab-cicd/testgolang#
```
創建一個ssh-key：
```
cd .ssh
cat id_rsa.pub
```
根據上一週的教學，我們到vm1上進行註冊的動作：
```
gitlab-runner register
```
```
root@ubuntu:~# gitlab-runner register
Runtime platform arch=amd64 os=linux pid=5274 revision=ece86343 version=13.5.0
Running in system-mode.
Please enter the gitlab-ci coordinator URL (e.g. https://gitlab.com/):
https://gitlab.com/
Please enter the gitlab-ci token for this runner:
2dsV-fWRTxKdCnNE1pzq
Please enter the gitlab-ci description for this runner:
[ubuntu]: vm2
Please enter the gitlab-ci tags for this runner (comma separated):
vm2
Registering runner... succeeded runner=2dsV-fWR
Please enter the executor: ssh, virtualbox, kubernetes, custom, docker, parallels, shell, docker-ssh, docker+machine, docker-ssh+machine:
shell
Runner registered successfully. Feel free to start it, but if it's running already the config should be automatically reloaded!
```
而當你註冊完後，到VM2進行上傳的動作，並且確認你的VM1是否有成功自動部署：
```
git add .
git commit -m "submit a file."
git push -u origin master
```
```
root@vm2:~/gitlab-cicd/testgolang# git add .
root@vm2:~/gitlab-cicd/testgolang# git commit -m "send a file."
On branch master
Your branch is up-to-date with 'origin/master'.
nothing to commit, working directory clean
root@vm2:~/gitlab-cicd/testgolang# git push -u origin master
Branch master set up to track remote branch master from origin.
Everything up-to-date
root@vm2:~/gitlab-cicd/testgolang#
```
當出現這樣的結果時，代表你的VM1已經部署完成了：
接著到VM1上，去查看容器是否啟動並且進行測試：
```
root@vm1:~# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b3e97042c8f5 testgolang "./testgolang" 2 minutes ago Up 2 minutes 0.0.0.0:8001->8001/tcp testgolang
b8f4ca51448e iris "/bin/sh -c 'python …" 18 hours ago Up 18 hours 0.0.0.0:5000->5000/tcp iris
becebb97850a httpd "httpd-foreground" 23 hours ago Up 23 hours 0.0.0.0:8080->80/tcp laughing_tereshkova
root@vm1:~# curl 127.0.0.1:8001/hello
hello chinaase willim ,I running in docker-container and buit by gitlabroot@vm1:~#
```
## docker-compose
創建一個資料夾test-dockercompose：
Dockerfile：
```
FROM python
ADD . /code
WORKDIR /code
RUN pip install -r requirements.txt
CMD ["python", "app.py"]
```
docker-compose.yml：
```
version: '3'
services:
web:
build: .
ports:
- "5000:5000"
volumes:
- .:/code
redis:
image: "redis:alpine"
```
app.py：
```
import time
import redis
from flask import Flask
app = Flask(__name__)
cache = redis.Redis(host='redis', port=6379)
def get_hit_count():
retries = 5
while True:
try:
return cache.incr('hits')
except redis.exceptions.ConnectionError as exc:
if retries == 0:
raise exc
retries -= 1
time.sleep(0.5)
@app.route('/')
def get_index():
count = get_hit_count()
return 'Yo! 你是第 {} 次瀏覽\n'.format(count)
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
```
requirements.txt：
```
flask
redis
```
啟動docker-compose：
```
root@vm2:/home/user/test-dockercompose# docker-compose up -d
WARNING: The Docker Engine you're using is running in swarm mode.
Compose does not use swarm mode to deploy services to multiple nodes in a swarm. All containers will be scheduled on the current node.
To deploy your application across the swarm, use `docker stack deploy`.
Creating test-dockercompose_web_1 ... done
Creating test-dockercompose_redis_1 ... done
```
結果你會看到：
```
root@vm2:/home/user/test-dockercompose# docker ps -a | grep test
905f605a7cb8 test-dockercompose_web "python app.py" About a minute ago Up About a minute 0.0.0.0:5000->5000/tcp test-dockercompose_web_1
eeae994db869 redis:alpine "docker-entrypoint.s…" About a minute ago Up About a minute 6379/tcp test-dockercompose_redis_1
root@vm2:/home/user/test-dockercompose#
```
接著你可以到網頁上進行測試：
## Reference
[上課影片](https://drive.google.com/drive/folders/1oM_ejAeSIhGbDGAVBDnVRv4DuoXaDwYw?usp=sharing)
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