Mesos+Marathon+docker集群部署

2015/12/14 docker Cloud

基于Centos7.2 Mesos+Marathon集群部署,服务发现使用bamboo组件。

1 整体架构

节点名称 节点类型 IP 组件
master101 master 192.168.2.71 mesos、marathon、zookpeer
master102 master 192.168.2.72 mesos、marathon、zookpeer
master103 master 192.168.2.73 mesos、marathon、zookpeer
slave101 slave 192.168.2.61 mesos、docker
slave102 slave 192.168.2.62 mesos、docker
slave103 slave 192.168.2.63 mesos、docker
bamboo101 负载均衡 192.168.2.91 haproxy、bamboo、keeplived
bamboo102 负载均衡 192.168.2.92 haproxy、bamboo、keeplived
bamboo103 负载均衡 192.168.2.93 haproxy、bamboo、keeplived

说明:集群模式部署,master节点应该是奇数,最少为3个节点,便于leader选举

2 环境准备

操作系统:Centos7.2 Minimal
Mesos版本:0.24.1
Marathon版本:0.11.0
Docker版本:1.7.1

  • 关闭selinux(重启)
sed -i 's/^SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
  • 关闭防火墙
systemctl disable firewalld.service
  • 清空iptables
iptables -F
  • 升级centos包
yum update
  • 安装mesosphere仓库
rpm -Uvh http://repos.mesosphere.com/el/7/noarch/RPMS/mesosphere-el-repo-7-1.noarch.rpm
yum clean all
yum makecache

说明:以上部署所有节点执行

3 Master节点安装

3.1 组件安装

yum -y install mesos marathon mesosphere-zookeeper

3.2 配置zookeeper

#master101
echo 1 > /var/lib/zookeeper/myid
#master102
echo 2 > /var/lib/zookeeper/myid
#master103
echo 3 > /var/lib/zookeeper/myid

编辑文件/etc/zookeeper/conf/zoo.cfg,追加以下内容

server.1=192.168.2.71:2888:3888
server.2=192.168.2.72:2888:3888
server.3=192.168.2.73:2888:3888

重启zookeeper服务

systemctl start zookeeper

3.3 配置mesos

配置mesos使用zookeeper

echo zk://192.168.2.71:2181,192.168.2.72:2181,192.168.2.73:2181/mesos > /etc/mesos/zk
echo 2 > /etc/mesos-master/quorum

配置mesos-master组件的hostname和ip参数

#master101
echo 192.168.2.71 > /etc/mesos-master/hostname
echo 192.168.2.71 > /etc/mesos-master/ip
#master102
echo 192.168.2.72 > /etc/mesos-master/hostname
echo 192.168.2.72 > /etc/mesos-master/ip
#master103
echo 192.168.2.73 > /etc/mesos-master/hostname
echo 192.168.2.73 > /etc/mesos-master/ip

说明:hostname可以不配置,默认使用机器名

停用masrer节点上的mesos-slave服务

systemctl stop mesos-slave.service && systemctl disable mesos-slave.service

重启mesos-master服务

systemctl restart mesos-master.service

3.4 配置marathon

mkdir -p /etc/marathon/conf

直接复制mesos的hostname文件

cp /etc/mesos-master/hostname /etc/marathon/conf
echo http_callback > /etc/marathon/conf/event_subscriber

3.5 配置marathon使用zookeeper(可选)

默认情况下marathon会自动获取本机的mesos的zk配置,并且会根据zookeeper的配置。为自己添加marathon的配置同步,手动添加以下配置文件是为了便于管理,同样,其他的marathon参数,都可以以参数名称命名一个文件,存放在/etc/marathon/conf目录下,然后在其中设置参数值的形式为marathon作进一步配置 提示:在本例中,默认的marathon启动命令为:

marathon: run_jar --hostname 192.168.2.71 --zk zk://192.168.2.71:2181,192.168.2.72:2181,192.168.2.73:2181/marathon --master zk://192.168.2.71:2181,192.168.2.72:2181,192.168.2.73:2181/mesos

第一步:连接mesos的zookeeper

cp /etc/mesos/zk /etc/marathon/conf/master

第二步:配置marathon使用的zookeeper

echo zk://192.168.2.71:2181,192.168.2.72:2181,192.168.2.73:2181/marathon /etc/marathon/conf/zk

启动服务及检测

重启marathon服务

systemctl restart marathon

检查端口监听情况

说明:如果没有lsof命令可以下载安装yum install -y lsof

zookeeper端口:lsof -i :2181 -n

COMMAND    PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java      2893 root   23u  IPv6  23787      0t0  TCP *:eforward (LISTEN)
java      2893 root   27u  IPv6  25757      0t0  TCP 192.168.2.71:eforward->192.168.2.71:35808 (ESTABLISHED)
java      2893 root   30u  IPv6  24204      0t0  TCP 192.168.2.71:eforward->192.168.2.71:35812 (ESTABLISHED)
java      2893 root   31u  IPv6  25810      0t0  TCP 192.168.2.71:eforward->192.168.2.71:35852 (ESTABLISHED)
java      2893 root   32u  IPv6  25803      0t0  TCP 192.168.2.71:eforward->192.168.2.72:57387 (ESTABLISHED)
java      2957 root   15u  IPv4  25761      0t0  TCP 192.168.2.71:35812->192.168.2.71:eforward (ESTABLISHED)
java      2957 root   31u  IPv6  25157      0t0  TCP 192.168.2.71:35808->192.168.2.71:eforward (ESTABLISHED)
java      2957 root   37u  IPv6  25758      0t0  TCP 192.168.2.71:54372->192.168.2.72:eforward (ESTABLISHED)
mesos-mas 3342 root   17u  IPv4  25809      0t0  TCP 192.168.2.71:35852->192.168.2.71:eforward (ESTABLISHED)
mesos-mas 3342 root   18u  IPv4  26920      0t0  TCP 192.168.2.71:54419->192.168.2.72:eforward (ESTABLISHED)
mesos-mas 3342 root   22u  IPv4  25817      0t0  TCP 192.168.2.71:54420->192.168.2.72:eforward (ESTABLISHED)
mesos-mas 3342 root   23u  IPv4  25816      0t0  TCP 192.168.2.71:54418->192.168.2.72:eforward (ESTABLISHED)

mesos端口:lsof -i :5050 -n

java      2957 root   27u  IPv4  25326      0t0  TCP 192.168.2.71:52901->192.168.2.72:mmcc (ESTABLISHED)
mesos-mas 3342 root    5u  IPv4  24286      0t0  TCP 192.168.2.71:mmcc (LISTEN)
mesos-mas 3342 root   24u  IPv4  26921      0t0  TCP 192.168.2.71:52898->192.168.2.72:mmcc (ESTABLISHED)
mesos-mas 3342 root   25u  IPv4  26967      0t0  TCP 192.168.2.71:60935->192.168.2.73:mmcc (ESTABLISHED)
mesos-mas 3342 root   26u  IPv4  25818      0t0  TCP 192.168.2.71:mmcc->192.168.2.72:45845 (ESTABLISHED)
mesos-mas 3342 root   27u  IPv4  25823      0t0  TCP 192.168.2.71:mmcc->192.168.2.73:51978 (ESTABLISHED)

其他端口

mesos通信端口:lsof -i :2888 -n
mesos选举端口:lsof -i :3888 -n
marathon端口:lsof -i :8080 -n

服务重启命令

systemctl restart zookeeper
systemctl restart mesos-master
systemctl restart marathon

配置开机启动

chkconfig zookeeper on
chkconfig mesos-master on
chkconfig marathon on

4 Salve节点安装

4.1 组件安装

yum -y install mesos docker

4.2 配置mesos,与master一致

echo zk://192.168.2.71:2181,192.168.2.72:2181,192.168.2.73:2181/mesos > /etc/mesos/zk

4.3 配置mesos-slave

#slave101
echo 192.168.2.61 > /etc/mesos-slave/hostname
echo 192.168.2.61 > /etc/mesos-slave/ip
#slave102
echo 192.168.2.62 > /etc/mesos-slave/hostname
echo 192.168.2.62 > /etc/mesos-slave/ip
#slave103
echo 192.168.2.63 > /etc/mesos-slave/hostname
echo 192.168.2.63 > /etc/mesos-slave/ip

hostname可以不配置,默认使用机器名

4.4 配置mesos-slave使用docker容器

echo 'docker,mesos' > /etc/mesos-slave/containerizers
echo '5mins' > /etc/mesos-slave/executor_registration_timeout

如果使用本地docker仓库,需要配置docker

sed -i "s/^OPTIONS='--selinux-enabled'/OPTIONS='--selinux-enabled --insecure-registry 192.168.2.98:5000'/g" /etc/sysconfig/docker

说明:192.168.2.98:5000是本环境中部署的docker registry仓库地址

4.5 启动服务

停用slave节点上的mesos-master服务

systemctl stop mesos-master.service && systemctl disable mesos-master.service

服务重启命令

systemctl restart docker
systemctl restart mesos-slave

配置开机启动

chkconfig docker on
chkconfig mesos-slave on

5 Mesos简单使用

5.1 Mesos控制台

Mesos的控制台地址:http://192.168.2.71:5050 Mesos的控制台上可以查看的当前的资源实用情况、Slave节点状态、当前运行的Task、完成的Task、可以切换到Framework(如Marathon)或者Slave。

5.2 Marathon控制台

Marathon控制台地址:http://192.168.2.71:8080 Marathon控制台上可以查看当前应用的运行状态,可以发布新应用、调整当前应用的实例数等。
发布应用:

ID:hello
CPUs:0.1
Memory:16
Disk Space:0
Instances:1
Command:echo hello world!;sleep 10;

上述例子是使用Mesos默认容器进行创建,并执行任务;如果需要使用docker容器,可以在Docker container settings中填写具体参数。 应用创建后,会输出hello world!,并且每10秒钟重新deploy一次。

说明:Mesos+Marathon框架发布的Task会在执行完毕后进行销毁,并重新发布,若是需要发布web app一类的长应用,必须保证运行程序独占console,如Tomcat,可以执行catalina.sh run进行启动并保持长运行状态,后台运行的程序Marathon无法保持Task长运行。

可以通过Marathon的RestAPI发布应用

curl -X POST http://192.168.2.71:8080/v2/apps -d@inky.json -H "Content-type: application/json"

inky.json文件示例

{
    "id": "inky4",
    "container": {
        "docker": {
            "image": "192.168.2.98:5000/tomcat-jdk1.7",
            "network":"BRIDGE",
            "portMappings":[{"containerPort":8080,"hostPort":0,"protocol": "tcp"}]
        },
        "type": "DOCKER",
        "volumes": []
    },
    "args": [],
    "cpus": 1,
    "mem": 512,
    "instances": 1
}

6 Docker私有仓库

6.1 仓库搭建

方式一:通过docker image构建

docker run -d -p 5000:5000 -v /opt/data/registry:/tmp/registry:rw registry

说明:/tmp/registry:容器中镜像的存储位置 /opt/data/registry:挂载/tmp/registry到本地宿主机上的目录

方式二:通过本地安装docker-registry构建

yum install -y python-devel libevent-devel python-pip gcc xz-devel
python-pip install docker-registry

存储路径修改:

cp config/config_sample.yml config/config.yml

修改其中的:storage_path参数,启动docker-registry的web服务

gunicorn -c contrib/gunicorn.py docker_registry.wsgi:application

6.2 上传、下载镜像

  1. 从公有创库中获取基础镜像(docker pull)
  2. 对基础镜像做出修改(docker commit)
  3. 标记本地镜像(docker tag)
  4. 推送镜像到私有仓库(docker push)
  5. 获取私有仓库镜像(docker pull)

7 负载均衡与服务发现

7.1 Haproxy组件

yum install -y haproxy

配置忽略VIP及开启转发

echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf
echo net.ipv4.ip_nonlocal_bind=1 >> /etc/sysctl.conf

重启系统或者执行以下命令

sysctl -e net.ipv4.ip_forward=1
sysctl -e net.ipv4.ip_nonlocal_bind=1

重启haproxy服务

chkconfig haproxy on
systemctl restart haproxy

7.2 Bamboo组件

通过脚本自动安装

curl https://raw.githubusercontent.com/VFT/bamboo/master/install.sh | sh
mkdir /var/bamboo
cp /opt/bamboo/config/haproxy_template.cfg /var/bamboo/
cp /opt/bamboo/config/production.example.json /var/bamboo/production.json

启动Bamboo服务

nohup /opt/bamboo/bamboo -haproxy_check -config="/var/bamboo/production.json" &

停止Bamboo服务

kill $(lsof -i:8000 |awk '{print $2}' | tail -n 2)

说明:可以用命令netstat -ntpl或者lsof -i :5050 -n查看进程

7.3 Bamboo组件(源码编译安装)

直接获取rpm包

wget https://github.com/VFT/mesos-docker/blob/master/package/bamboo-0.2.16_1-1.x86_64.rpm

或者自主编译rpm二进制包

# build dependencies
sudo yum install -y golang rpm-build rubygems ruby-devel
sudo gem install  fpm  --no-ri --no-rdoc
# setup a go build tree
sudo yum install -y git mercurial
export GOPATH=~/gopath
mkdir $GOPATH
go get github.com/tools/godep
go install github.com/tools/godep
# build the binary
# get newest source code
go get github.com/QubitProducts/bamboo
cd ${GOPATH}/src/github.com/QubitProducts/bamboo
# or get a specil version source code,such as:
# wget https://github.com/QubitProducts/bamboo/archive/v0.2.15.tar.gz
# tar xzvf v0.2.15.tar.gz
# cd bamboo-0.2.15/
go build

# edit builder/build.after-install
sed -i '10,15s/configure)/*)/g' builder/build.after-install

# edit builder/build.sh
sed -i 's/version=${_BAMBOO_VERSION:-"1.0.0"}/version=${_BAMBOO_VERSION:-"0.2.15"}/g' builder/build.sh
sed -i 's/arch="all"/arch="x86_64"/g' builder/build.sh
sed -i 's/pkgtype=${_PKGTYPE:-"deb"}/pkgtype=${_PKGTYPE:-"rpm"}/g' builder/build.sh

#运行命令生成rpm包,输出到output目录
./builder/build.sh

#安装rpm包
rpm -ivh bamboo-0.2.15_1-1.x86_64.rpm

安装start-stop-daemon: 方式一直接获取

wget https://github.com/VFT/mesos-docker/blob/master/script/init.d-bamboo-server

方式二自主编译

yum install -y gcc wget
wget http://developer.axis.com/download/distribution/apps-sys-utils-start-stop-daemon-IR1_9_18-2.tar.gz
tar zxf apps-sys-utils-start-stop-daemon-IR1_9_18-2.tar.gz
cd apps/sys-utils/start-stop-daemon-IR1_9_18-2/
gcc start-stop-daemon.c -o start-stop-daemon
cp start-stop-daemon /usr/bin

配置bamboo-server启动(脚本位于源码包中)

wget https://github.com/QubitProducts/bamboo/archive/v0.2.14.tar.gz
tar xzvf v0.2.14.tar.gz
cd bamboo-0.2.14/
cp builder/init.d-bamboo-server /etc/init.d/bamboo-server
chown root:root /etc/init.d/bamboo-server
chmod 755 /etc/init.d/bamboo-server
chkconfig bamboo-server on

修改/var/bamboo/production.json

{
  "Marathon": {
    "Endpoint": "http://192.168.2.71:8080,http://192.168.2.72:8080,http://192.168.2.73:8080",
    "UseEventStream": true
  },

  "Bamboo": {
    "Endpoint": "http://192.168.2.93:8000",
    "Zookeeper": {
      "Host": "192.168.2.71:2181,192.168.2.72:2181,192.168.2.73:2181",
      "Path": "/marathon-haproxy/state",
      "ReportingDelay": 5
    }
  },

  "HAProxy": {
    "TemplatePath": "/var/bamboo/haproxy_template.cfg",
    "OutputPath": "/etc/haproxy/haproxy.cfg",
    "ReloadCommand": "haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D -sf $(cat /var/run/haproxy.pid)",
    "ReloadValidationCommand": "haproxy -c -f "
  },

  "StatsD": {
    "Enabled": false,
    "Host": "localhost:8125",
    "Prefix": "bamboo-server.production."
  }
}

说明:Marathon.Endpoint:Marathon服务的访问地址,Bamboo.Host:Bamboo服务控制台地址,Bamboo.Zookeeper.Host:Zookeeper服务访问地址

修改/var/bamboo/haproxy_template.cfg

stats socket /run/haproxy/admin.sock mode 660 level admin  >>   stats socket /var/lib/haproxy/stats

启动Bamboo服务

systemctl start bamboo-server

停止Bamboo服务

systemctl stop bamboo-server

7.4 Bamboo简单使用

按上述配置Bamboo安装后以后,Bamboo监听8000端口,可以通过http://<IP>:8000来访问bamboo的控制台

bamboo console

添加转发规则

bamboo edit

现在,可以通过http://<IP>,默认端口:80来访问inky1这个app。

8 疑难杂症

8.1 内存不足

  • 表现:无法发布app应用,marathon日志中关键提示mem NOT SATISFIED
  • 分析:free命令查看宿主机内存使用率
    [root@slave101 ~]# free -h
                total        used        free      shared  buff/cache   available
    Mem:           1.8G        339M        261M         24M        1.2G        1.2G
    Swap:          2.0G         76K        2.0G
    

可以看出,空闲内存不足,基本都是被cache占用,而marathon识别内存时是从free中识别

  • 解决:手动释放内存
    sync
    echo 3 > /proc/sys/vm/drop_caches
    sysctl -p
    

查看内存情况:

[root@salve102 ~]# free -h
              total        used        free      shared  buff/cache   available
Mem:           1.8G        441M        1.2G         24M        167M        1.2G
Swap:          2.0G        108K        2.0G

版权声明:允许转载,请注明原文出处:http://cloudnil.com/2015/12/14/Deploy-mesos-and-marathon/。

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