简易的docker应用部署以及修改了部分启动脚本的bug
bug修改
在启动了marathon后，我在mesos的webUI上发现marathon一直处于inactive状态，后来想了想，marathon是放在启动master的脚本中了，当它启动时，slave/agent还未启动，所以才会导致framework呈现未激活的状态，所以将在mesos上运行的framework的启动单独做成一个启动脚本，问题解决
修改如下：
原start_master/tasks/main.yml
---
- name: get ip
shell: ip addr|grep eth1|grep inet|awk '{print $2}'| cut -d / -f 1
register: local_ip
- name: start zookeeper
shell: "{{remote_dir}}/zookeeper/bin/zkServer.sh start"
- name: start mesos master
shell: "{{remote_dir}}/mesos/sbin/mesos.sh start_master --hostname {{local_ip['stdout']}} --advertise_ip {{local_ip['stdout']}} --quorum {{quorum}} --zk {{mesos_zk}}"
- name: start marathon
shell: "{{remote_dir}}/marathon/bin/marathon.sh start --master {{master}} --zk {{marathon_zk}} --libmesos_path {{remote_dir}}/mesos/lib/libmesos.so --hostname {{local_ip['stdout']}}"
现start_master/tasks/main.yml
---
- name: get ip
shell: ip addr|grep eth1|grep inet|awk '{print $2}'| cut -d / -f 1
register: local_ip
- name: start zookeeper
shell: "{{remote_dir}}/zookeeper/bin/zkServer.sh start"
- name: start mesos master
shell: "{{remote_dir}}/mesos/sbin/mesos.sh start_master --hostname {{local_ip['stdout']}} --advertise_ip {{local_ip['stdout']}} --quorum {{quorum}} --zk {{mesos_zk}}"同时添加start_framework/tasks/main.yml
---
- name: get ip
shell: ip addr|grep eth1|grep inet|awk '{print $2}'| cut -d / -f 1
register: local_ip
- name: start marathon
shell: "{{remote_dir}}/marathon/bin/marathon.sh start --master {{master}} --zk {{marathon_zk}} --libmesos_path {{remote_dir}}/mesos/lib/libmesos.so --hostname {{local_ip['stdout']}}"docker应用部署
我前两章提出了一个问题，关于能否在mesos进行Dockerfile的build这件事，我暂时好像没有找到有效的解决方法，所以目前还是以拉取镜像部署为场景
- 应用场景
一个项目托管在github或者私人的gitlab上，当远程仓库有push时，就会触发webhook，将信息post给一个CI服务，CI将项目clone下来并进行镜像的build，并将镜像push到私有docker仓库，随后用API接口调用marathon进行部署
- 简单的应用
这里我们编写了一个简单的测试服务及其Dockerfile，我们在这里并没有用到ci，docker私有镜像则采用阿里云的
app.py
from flask import Flask, jsonify
app = Flask(__name__)
@app.route('/test')
def hello():
return jsonify({'msg': 'hello'})
if __name__ == '__main__':
app.run(host='0.0.0.0')
Dockerfile
扫描二维码关注公众号，回复：
1066576 查看本文章
FROM python:3
COPY ["./", "/var/test_server"]
WORKDIR /var/test_server
RUN pip3 install -r requirements.txt -i https://pypi.douban.com/simple/
CMD ["python3", "app.py"]marathon的部署配置
{
"id": "mesos-learn",
"cpus": 0.5,
"mem": 64.0,
"networks": [ { "mode": "container/bridge" } ],
"container": {
"type": "DOCKER",
"docker": {
"forcePullImage": false,
"image": "xxxx:xxxx"
},
"portMappings": [
{
"containerPort": 5000,
"hostPort": 31000,
"protocol": "tcp",
"servicePort": 10000
}
]
}
}tips: slave上的docker都需要配置你的私有仓库才可以
写了一个添加私有docker仓库的模块
add_docker_registry.py
import json
import os
from ansible.module_utils.basic import AnsibleModule
def add_registry(uri, auth, docker_home):
if not os.path.isfile(docker_home+'/config.json'):
with open(docker_home+'/config.json', 'w') as f:
json.dump({}, f)
with open(docker_home+'/config.json') as f:
d = json.load(f)
if d.get('auths') is None:
d['auths'] = {}
d['auths'][uri] = {}
d['auths'][uri]['auth'] = auth
with open(docker_home+'/config.json', 'w') as f:
json.dump(d, f)
def main():
module = AnsibleModule(
argument_spec=dict(
uri=dict(),
auth=dict(),
docker_home=dict(type='str', default='~/.docker')
)
)
uri, auth, docker_home = module.params['uri'], module.params['auth'], module.params['docker_home']
if uri.strip() == '':
module.fail_json(msg='uri could not be None')
if auth.strip() == '':
module.fail_json(msg='auth could not be None')
docker_home = docker_home.replace('~', os.path.expanduser('~'))
if not os.path.isdir(docker_home):
os.mkdir(docker_home)
add_registry(uri, auth, docker_home)
module.exit_json(
uri=uri,
docker_home=docker_home,
msg='success'
)
if __name__ == '__main__':
main()
Usage
- name: add private registry
add_docker_registry: uri=xxx auth=xxxauth就是username:passwordbase64编码后的字符串，其中username和password需要替换成你自己的值