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README
MulanPSL-2.0

MogDB集群监控部署

本文档适用于手动部署监控报警系统的用户。

部署位置 端口 用途
监控服务器 9001 prometheus
监控服务器 9002 grafana
监控服务器 9003 AlertManager
监控服务器 9004 SNMP
数据库服务器 9100 node_exporter
数据库服务器 9187 og_exporter

下载这个项目.

git clone https://gitee.com/enmotech/mogdb-monitor.git
cd mogdb-monitor

部署监控服务分为两种方式.

Docker-Compose

  • 启动服务
docker-compose up -d
  • 查看状态
    Name                  Command               State                         Ports
----------------------------------------------------------------------------------------------------------
alertmanager   /bin/alertmanager --config ...   Up      0.0.0.0:9003->9093/tcp,:::9003->9093/tcp
grafana        /run.sh                          Up      0.0.0.0:9002->3000/tcp,:::9002->3000/tcp
prometheus     /bin/prometheus --config.f ...   Up      0.0.0.0:9001->9090/tcp,:::9001->9090/tcp

配置文件自动file_sd_config发现不需要每次都修改 prometheus.yml 文件

  • prometheus添加scrape

    prometheus/target/[os|db] 目录下 创建文件即可. 如

    # 增加主机监控放在os目录下
    # 增加数据库监控放在db目录下
    vi prometheus/target/os/os_192.168.1.100.yml
    - targets:
        - '192.168.1.100:9100'
      labels:
        env: product
        job: node_exporter
        instance: 192.168.1.100

Manual installation

手工安装也需要拉取项目

prometheus

Download prometheus

软件下载地址: https://prometheus.io/download/

根据平台进行下载,这里选择arm平台

下载安装介质: prometheus-2.31.1.linux-arm64.tar.gz

# arm 平台
wget https://github.com/prometheus/prometheus/releases/download/v2.31.1/prometheus-2.31.1.linux-arm64.tar.gz
# amd 平台
wget https://github.com/prometheus/prometheus/releases/download/v2.32.1/prometheus-2.32.1.linux-amd64.tar.gz

创建prometheus用户

  1. 使用root用户创建prometheus用户

    useradd prometheus
  2. 使用root用户创建prometheus相应目录并解压安装包

    mkdir -p /app/prometheus/prometheus
    mkdir -p /app/prometheus/data
    mkdir -p /app/prometheus/target
    tar -zxvf prometheus-2.31.1.linux-arm64.tar.gz --strip-components 1 -C /app/prometheus/prometheus/
    # 复制项目里的prometheus配置文件
    cp -r prometheus/* /app/prometheus/
    chown -R prometheus: /app/prometheus
  3. 使用prometheus用户编辑配置文件。

    su - prometheus
    sed -i "s#/etc/prometheus#/app/prometheus/#g" /app/prometheus/prometheus.yml
    sed -i "s#alertmanager:9093#127.0.0.1:9003#g" /app/prometheus/prometheus.yml
    sed -i "s#127.0.0.1:9090#127.0.0.1:9003#g" /app/prometheus/prometheus.yml

    注意需要修改scrape_configs中的内容,prometheustargets修改为部署机器的ip:port,node_exporter的targets同理

  4. 使用root用户配置prometheus开机启动,新建prometheus.server文件如下,

    vi /usr/lib/systemd/system/prometheus.service
    [Unit]
    Description=Prometheus Service
    After=network.target
    
    [Service]
    Type=simple
    User=prometheus
    ExecStart=/app/prometheus/prometheus/prometheus --web.listen-address=:9001 --config.file=/app/prometheus/prometheus.yml --storage.tsdb.path=/app/prometheus/data
    ExecReload=/bin/kill -HUP $MAINPID
    
    [Install]
    WantedBy=multi-user.target

    web.listen-address为监控服务器本机IP及prometheus使用端口

  5. 启动prometheus服务

    systemctl daemon-reload
    systemctl enable prometheus
    systemctl start prometheus
    systemctl status prometheus
  6. prometheus服务验证

    使用web浏览器验证prometheus服务如下:

    打开 http://node_ip:9001 如下如所示,说明prometheus服务正常。

    prometheus

Grafana

安装包下载

软件下载地址:https://grafana.com/grafana/download

根据平台进行下载,这里选择arm平台

下载安装介质:grafana-enterprise-7.5.11.linux-arm64.tar.gz


# arm64
wget https://dl.grafana.com/enterprise/release/grafana-enterprise-7.5.11.linux-arm64.tar.gz

# amd64
wget https://dl.grafana.com/enterprise/release/grafana-enterprise-7.5.11.linux-amd64.tar.gz

安装部署

  1. 使用root用户解压安装

    mkdir -p /app/grafana/grafana
    mkdir -p /app/grafana/data
    tar -zxvf grafana-enterprise-7.5.11.linux-arm64.tar.gz --strip-components 1 -C /app/grafana/grafana
    # 复制项目里的grafana配置文件
    cp -r grafana/* /app/grafana/
    chown -R prometheus: /app/grafana/
  2. 使用prometheus用户检查安装版本

    /app/grafana/grafana/bin/grafana-server -v

    回显如下:

    Version 7.5.11 (commit: 6f8c1d9fe4, branch: HEAD)
  3. 使用prometheus用户配置grafana,

    # vi /app/grafana/conf/defaults.ini
    # 修改grafana端口号为9002
    sed -i "s#http_port = 3000#http_port = 9002#g" /app/grafana/conf/grafana.ini
    # 修改自动注册数据源和dashborad配置
    sed -i "s#provisioning = conf/provisioning#provisioning = /app/grafana/provisioning#g" /app/grafana/conf/grafana.ini
    sed -i "s#http://prometheus:9090#http://127.0.0.1:9001#g" /app/grafana/provisioning/datasources/prometheus.yaml
    sed -i "s#/usr/share/grafana/dashboards#/app/grafana/dashboard#g" /app/grafana/provisioning/dashboards/mogdb.yaml
  4. 使用root用户配置服务开机启动,新建grafana.service文件如下:

    vi /usr/lib/systemd/system/grafana.service
    [Unit]
    Description=Grafana Service
    [Service]
    User=prometheus
    ExecStart=/app/grafana/grafana/bin/grafana-server -homepath /app/grafana/grafana/ -config /app/grafana/conf/grafana.ini
    [Install]
    WantedBy=multi-user.target
  5. 使用root用户启动grafana服务并确认服务状态

    systemctl daemon-reload
    systemctl enable grafana.service
    systemctl start grafana.service
    systemctl status grafana.service
  6. grafana服务验证

    使用web浏览器验证grafana服务

    打开 http://node_ip:9002 如下所示,说明grafana服务正常。

    grafana.png

    账号:admin 默认密码:Mogdb@123

    模版和数据源已自动导入

AltertManager

安装包下载

软件下载地址:https://github.com/prometheus/alertmanager/releases

根据平台进行下载,这里选择arm平台

下载安装介质:alertmanager-0.23.0.linux-arm64.tar.gz

wget https://github.com/prometheus/alertmanager/releases/download/v0.23.0/alertmanager-0.23.0.linux-arm64.tar.gz

安装部署

  1. 使用root用户解压安装包至/appdata/prometheus并授权

    mkdir -p /app/alertmanager/
    mkdir -p /app/alertmanager/data/
    tar -zxvf alertmanager-0.23.0.linux-arm64.tar.gz --strip-components 1 -C /app/alertmanager/
    # 复制项目里的alertmanager配置文件
    cp alertmanager/* /app/alertmanager/
    chown -R prometheus: /app/alertmanager/
  2. 使用prometheus用户配置alertmanager.yml文件,如下webhook_configsurl为监控服务器地址及SNMP使用端口号

    vi /app/alertmanager/alertmanager.yml
    route:
      group_by: ['...']
      group_wait: 10s
      group_interval: 30s
      repeat_interval: 1m
      receiver: 'snmp_notifier'
      routes:
        # database alert group by instance, server
        - receiver: 'snmp_notifier'
        group_by: [instance, server]
        group_wait: 10s
        matchers:
          - service=~"MogDB"
    receivers:
    - name: 'snmp_notifier'
      webhook_configs:
        - url: http://127.0.0.1:9004/alerts
    inhibit_rules:
      - source_match:
          severity: 'critical'
        target_match:
          severity: 'warning'
        equal: ['alertname', 'dev', 'instance']

    这里增加的是snmp_notifier告警通知. 具体更具情况进行配置. 配置文件说明alertmanager

  3. 使用root用户配置服务开机启动,新建alertmanager.service文件如下,如下web.listen-address为监控服务器地址及AlterManager使用端口号

    vi /usr/lib/systemd/system/alertmanager.service
    [Unit]
    Description=Prometheus Alert Manager
    After=network.target
    
    [Service]
    Type=simple
    User=prometheus
    ExecStart=/app/alertmanager/alertmanager --web.listen-address=:9003 --storage.path=/app/alertmanager/data --config.file=/app/alertmanager/alertmanager.yml
    ExecReload=/bin/kill -HUP $MAINPID
    
    [Install]
    WantedBy=multi-user.target
  4. 启动alertmanager服务并确认状态

    systemctl daemon-reload
    systemctl enable alertmanager
    systemctl start alertmanager
    systemctl status alertmanager
  5. prometheus配置alert manager

    默认配置文件已配置. 可忽略

    prometheus配置文件prometheus.yml修改如下内容,修改地址及端口号为监控服务器地址及alertmanager端口号,并打开告警规则文件rules/*.yml(告警规则文件包括mogdb_rules.yml和node_rules.yml需要上传至实际存放路径:/appdata/prometheus/prometheus-2.31.1.linux-arm64/etc/rules/),详见告警规则及文件。

    vi /app/prometheus/prometheus.yml
    alerting:
      alertmanagers:
      - static_configs:
        - targets:
          - "127.0.0.1:9003"

    prometheus配置文件prometheus.yml同时增加如下内容,红色字体为监控服务器地址及alertmanager使用端口号

    - job_name: 'alertmanager '
        static_configs:
        - targets: ['127.0.0.1:9003']

    如下图所示:

    img

  6. 使用root用户重启prometheus服务并确认服务状态

    systemctl restart prometheus
    systemctl status prometheus

    服务部署之后可在 targets 中观察是否成功

    截图

SNMP部署(可选)

安装包下载

软件下载地址:https://github.com/maxwo/snmp_notifier/releases

根据平台进行下载,这里选择arm平台

下载安装介质:snmp_notifier-1.2.1.linux-arm64.tar.gz

wget https://github.com/maxwo/snmp_notifier/releases/download/v1.2.1/snmp_notifier-1.2.1.linux-arm64.tar.gz

安装部署

  1. 使用root用户登录监控服务器,解压安装包至/app/snmp_notifier并授权

    mkdir -p /app/snmp_notifier/
    tar -zxvf snmp_notifier-1.2.1.linux-arm64.tar.gz --strip-components 1 -C /app/snmp_notifier/
  2. 使用root用户配置服务开机启动,新建snmp_notifier.service文件,如下web.listen-address为监控服务器地址及SNMP使用端口号

    vi /usr/lib/systemd/system/snmp_notifier.service
    [Unit]
    Description=Prometheus SNMP Notifier Service
    After=network.target
    
    [Service]
    Type=simple
    User=prometheus
    ExecStart=/app/snmp_notifier/snmp_notifier --web.listen-address=":9004" --snmp.trap-description-template /app/snmp_notifier/description-template.tpl --snmp.destination=50.1.2.67:162
    ExecReload=/bin/kill -HUP $MAINPID
    
    [Install]
    WantedBy=multi-user.target
    • --snmp.destination 接受地址
    • --snmp.extra-field-template=4=/app/snmp_notifier/4_extra-field-template.tpl 可增加snmp发送字段 如

    echo "{{ len .Alerts }} alerts are firing." > /app/snmp_notifier/4_extra-field-template.tpl

    --snmp.extra-field-template=4=/app/snmp_notifier/4_extra-field-template.tpl

    Agent Address: 0.0.0.0
     Agent Hostname: localhost
     Date: 1 - 0 - 0 - 1 - 1 - 1970
     Enterprise OID: .
     Trap Type: Cold Start
     Trap Sub-Type: 0
     Community/Infosec Context: TRAP2, SNMP v2c, community public
     Uptime: 0
     Description: Cold Start
     PDU Attribute/Value Pair Array:
    .iso.org.dod.internet.mgmt.mib-2.system.sysUpTime.sysUpTimeInstance = Timeticks: (2665700) 7:24:17.00
    .iso.org.dod.internet.snmpV2.snmpModules.snmpMIB.snmpMIBObjects.snmpTrap.snmpTrapOID.0 = OID: .iso.org.dod.internet.private.        enterprises.98789.0.1
    .iso.org.dod.internet.private.enterprises.98789.0.1.1 = STRING: "1.3.6.1.4.1.98789.0.1[environment=production,label=test]"
    .iso.org.dod.internet.private.enterprises.98789.0.1.2 = STRING: "critical"
    .iso.org.dod.internet.private.enterprises.98789.0.1.3 = STRING: "Status: critical
    - Alert: TestAlert
      Summary: This is the summary
      Description: This is the description on job1
    Status: warning
    - Alert: TestAlert
      Summary: This is the random summary
      Description: This is the description of alert 1"
    .iso.org.dod.internet.private.enterprises.98789.0.1.4 = STRING: "2 alerts are firing."

    .iso.org.dod.internet.private.enterprises.98789.0.1.4 = STRING: "2 alerts are firing." 新增数据

  3. 启动SNMP服务并确认状态

    systemctl daemon-reload
    systemctl enable snmp_notifier
    systemctl start snmp_notifier
    systemctl status snmp_notifier
  4. prometheus配置SNMP Notifier

    prometheus配置文件/app/prometheus/prometheus.yml增加如下内容

    - job_name: 'snmp_notifier'
        static_configs:
        - targets: ['110.128.131.16:9004']
  5. 重启prometheus服务

    使用root用户重启prometheus服务

    systemctl restart prometheus

exporter

node_exporter

安装包下载

软件下载地址:https://github.com/prometheus/node_exporter/releases

根据平台进行下载,这里选择arm平台

下载安装介质:node_exporter-1.2.2.linux-arm64.tar.gz

wget https://github.com/prometheus/node_exporter/releases/download/v1.2.2/node_exporter-1.2.2.linux-arm64.tar.gz

安装部署

注:node_exporter主备数据库服务器及监控服务器本机均需要安装

  1. 使用root用户解压安装包至/app/app/node_exporter目录

    mkdir -p /app/node_exporter
    tar -zxvf node_exporter-1.2.2.linux-arm64.tar.gz --strip-components 1 -C /app/node_exporter
  2. 使用root用户配置node_exporter开机启动,新建node_exporter.service文件如下,

    vi /usr/lib/systemd/system/node_exporter.service
    [Unit]
    Description=Prometheus Node Exporter Service
    After=network.target
    
    [Service]
    Type=simple
    User=root
    ExecStart=/app/node_exporter/node_exporter --web.listen-address=:9100 --no-collector.softnet
    ExecReload=/bin/kill -HUP $MAINPID
    
    [Install]
    WantedBy=multi-user.target

    web.listen-address为监控服务器本机IP及node_exporter使用端口

  3. 启动node_exporter服务

    systemctl daemon-reload
    systemctl enable node_exporter
    systemctl start node_exporter
  4. 查看node_exporter服务

    systemctl status node_exporter
    
    curl http://localhost:9100/metrics
  5. prometheus添加采集

    vi /app/prometheus/target/os/os_<node_ip>.yml
    - targets:
        - '127.0.0.1:9100'
      labels:
        env: product
        job: prometheus
        instance: 127.0.0.1

og_exporter

安装包下载

软件下载地址:https://gitee.com/opengauss/openGauss-prometheus-exporter/releases/v1.0.0

根据平台进行下载,这里选择arm平台

下载安装介质: opengauss_exporter_1.0.0_linux_arm64.zip

wget https://gitee.com/opengauss/openGauss-prometheus-exporter/attach_files/973905/download/opengauss_exporter_1.0.0_linux_arm64.zip

og_exporter 可以选择部署在数据库服务器或者其他服务器,只要og_exporter可以连接数据即可

安装部署

  1. 使用root用户解压安装包至/app/promethues/opengauss_exporter目录并授权

    mkdir -p /app/opengauss_exporter
    unzip opengauss_exporter_1.0.0_linux_arm64.zip -d /app/opengauss_exporter
  2. 上传 og_expoter/queries.yaml文件,放到/app/opengauss_exporter/

    cp og_expoter/queries.yaml /app/opengauss_exporter/ 

本地连接监控

本地连接监控需要exporter运行在数据库操作系统用户下

  1. 查看数据库socket路径

    postgres=# show unix_socket_directory;
    unix_socket_directory
    -----------------------
    /tmp
    (1 row)
  2. 配置开启启动

    vi /usr/lib/systemd/system/mogdb_exporter.service
    [Unit]
    Description=Prometheus MogDB Exporter Service
    
    [Service]
    # 启动用户需要和数据库操作系统用户一致
    User=omm
    Environment="DATA_SOURCE_NAME=host=/tmp port=26000 user=omm dbname=postgres"
    ExecStart=/app/opengauss_exporter/opengauss_exporter --auto-discover-databases --exclude-databases="template0,template1" --web.listen-address=:9187 --config=/app/opengauss_exporter/queries.yaml
    
    [Install]
    WantedBy=multi-user.target
  3. 启动并查看dbexporter服务

    systemctl daemon-reload
    systemctl enable mogdb_exporter.service
    systemctl start mogdb_exporter.service
    systemctl status mogdb_exporter.service

远程连接监控

  1. 被监控的数据库需要创建监控用户,密码复杂度要符合数据库的要求,默认要求大小写+特殊字符,不少于8位

    在要监控的数据库创建用户

    gsql -Uomm postgres -r -p 26000
    show password_encryption_type; #是否是1, 不是改为1
    alter system set password_encryption_type=1;
    CREATE USER db_exporter WITH PASSWORD 'Admin@1234' MONADMIN;
    grant usage on schema dbe_perf to db_exporter;
    grant select on pg_stat_replication to db_exporter;
  2. 配置pg_hba.conf以md5加密方式添加监控服务器白名单,使用omm用户主库执行如下操作, 如果是本机则把ip改为0.0.0.0/0,

    gs_guc set -I all -N all -h "host postgres db_exporter 110.128.131.16/32 md5"
  3. 在监控服务器端使用root用户配置db_exporter服务开机启动,新建mogdb_exporter.service 文件如下,

    Environment为 IP地址及数据库访问监听端口26000 web.listen-address为项目管理系统dbexporter使用端口9187

    vi /usr/lib/systemd/system/mogdb_exporter.service
    [Unit]
    Description=Prometheus MogDB Exporter Service
    
    [Service]
    # 需要操作系统存在prometheus无此用户请自行创建
    User=prometheus
    Environment="DATA_SOURCE_NAME=postgresql://db_exporter:Admin@1234@35.10.3.34:26000/postgres?sslmode=disable"
    ExecStart=/app/opengauss_exporter/opengauss_exporter --auto-discover-databases --exclude-databases="template0,template1" --web.listen-address=:9187 --config=/app/opengauss_exporter/queries.yaml
    
    [Install]
    WantedBy=multi-user.target

    注:如果是集群则写俩个Environment

  4. 启动并查看dbexporter服务

    systemctl daemon-reload
    systemctl enable mogdb_exporter.service
    systemctl start mogdb_exporter.service
    systemctl status mogdb_exporter.service

Prometheus添加数据库节点

vi /app/prometheus/target/db/db_<node_ip>.yml
- targets:
    - '<node_ip>:9187'
  labels:
    job: mogdb_exporter
    instance: <node_ip>
木兰宽松许可证, 第2版 木兰宽松许可证, 第2版 2020年1月 http://license.coscl.org.cn/MulanPSL2 您对“软件”的复制、使用、修改及分发受木兰宽松许可证,第2版(“本许可证”)的如下条款的约束: 0. 定义 “软件”是指由“贡献”构成的许可在“本许可证”下的程序和相关文档的集合。 “贡献”是指由任一“贡献者”许可在“本许可证”下的受版权法保护的作品。 “贡献者”是指将受版权法保护的作品许可在“本许可证”下的自然人或“法人实体”。 “法人实体”是指提交贡献的机构及其“关联实体”。 “关联实体”是指,对“本许可证”下的行为方而言,控制、受控制或与其共同受控制的机构,此处的控制是指有受控方或共同受控方至少50%直接或间接的投票权、资金或其他有价证券。 1. 授予版权许可 每个“贡献者”根据“本许可证”授予您永久性的、全球性的、免费的、非独占的、不可撤销的版权许可,您可以复制、使用、修改、分发其“贡献”,不论修改与否。 2. 授予专利许可 每个“贡献者”根据“本许可证”授予您永久性的、全球性的、免费的、非独占的、不可撤销的(根据本条规定撤销除外)专利许可,供您制造、委托制造、使用、许诺销售、销售、进口其“贡献”或以其他方式转移其“贡献”。前述专利许可仅限于“贡献者”现在或将来拥有或控制的其“贡献”本身或其“贡献”与许可“贡献”时的“软件”结合而将必然会侵犯的专利权利要求,不包括对“贡献”的修改或包含“贡献”的其他结合。如果您或您的“关联实体”直接或间接地,就“软件”或其中的“贡献”对任何人发起专利侵权诉讼(包括反诉或交叉诉讼)或其他专利维权行动,指控其侵犯专利权,则“本许可证”授予您对“软件”的专利许可自您提起诉讼或发起维权行动之日终止。 3. 无商标许可 “本许可证”不提供对“贡献者”的商品名称、商标、服务标志或产品名称的商标许可,但您为满足第4条规定的声明义务而必须使用除外。 4. 分发限制 您可以在任何媒介中将“软件”以源程序形式或可执行形式重新分发,不论修改与否,但您必须向接收者提供“本许可证”的副本,并保留“软件”中的版权、商标、专利及免责声明。 5. 免责声明与责任限制 “软件”及其中的“贡献”在提供时不带任何明示或默示的担保。在任何情况下,“贡献者”或版权所有者不对任何人因使用“软件”或其中的“贡献”而引发的任何直接或间接损失承担责任,不论因何种原因导致或者基于何种法律理论,即使其曾被建议有此种损失的可能性。 6. 语言 “本许可证”以中英文双语表述,中英文版本具有同等法律效力。如果中英文版本存在任何冲突不一致,以中文版为准。 条款结束 如何将木兰宽松许可证,第2版,应用到您的软件 如果您希望将木兰宽松许可证,第2版,应用到您的新软件,为了方便接收者查阅,建议您完成如下三步: 1, 请您补充如下声明中的空白,包括软件名、软件的首次发表年份以及您作为版权人的名字; 2, 请您在软件包的一级目录下创建以“LICENSE”为名的文件,将整个许可证文本放入该文件中; 3, 请将如下声明文本放入每个源文件的头部注释中。 Copyright (c) [Year] [name of copyright holder] [Software Name] is licensed under Mulan PSL v2. You can use this software according to the terms and conditions of the Mulan PSL v2. You may obtain a copy of Mulan PSL v2 at: http://license.coscl.org.cn/MulanPSL2 THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. See the Mulan PSL v2 for more details. Mulan Permissive Software License,Version 2 Mulan Permissive Software License,Version 2 (Mulan PSL v2) January 2020 http://license.coscl.org.cn/MulanPSL2 Your reproduction, use, modification and distribution of the Software shall be subject to Mulan PSL v2 (this License) with the following terms and conditions: 0. Definition Software means the program and related documents which are licensed under this License and comprise all Contribution(s). Contribution means the copyrightable work licensed by a particular Contributor under this License. Contributor means the Individual or Legal Entity who licenses its copyrightable work under this License. Legal Entity means the entity making a Contribution and all its Affiliates. Affiliates means entities that control, are controlled by, or are under common control with the acting entity under this License, ‘control’ means direct or indirect ownership of at least fifty percent (50%) of the voting power, capital or other securities of controlled or commonly controlled entity. 1. Grant of Copyright License Subject to the terms and conditions of this License, each Contributor hereby grants to you a perpetual, worldwide, royalty-free, non-exclusive, irrevocable copyright license to reproduce, use, modify, or distribute its Contribution, with modification or not. 2. Grant of Patent License Subject to the terms and conditions of this License, each Contributor hereby grants to you a perpetual, worldwide, royalty-free, non-exclusive, irrevocable (except for revocation under this Section) patent license to make, have made, use, offer for sale, sell, import or otherwise transfer its Contribution, where such patent license is only limited to the patent claims owned or controlled by such Contributor now or in future which will be necessarily infringed by its Contribution alone, or by combination of the Contribution with the Software to which the Contribution was contributed. The patent license shall not apply to any modification of the Contribution, and any other combination which includes the Contribution. If you or your Affiliates directly or indirectly institute patent litigation (including a cross claim or counterclaim in a litigation) or other patent enforcement activities against any individual or entity by alleging that the Software or any Contribution in it infringes patents, then any patent license granted to you under this License for the Software shall terminate as of the date such litigation or activity is filed or taken. 3. No Trademark License No trademark license is granted to use the trade names, trademarks, service marks, or product names of Contributor, except as required to fulfill notice requirements in Section 4. 4. Distribution Restriction You may distribute the Software in any medium with or without modification, whether in source or executable forms, provided that you provide recipients with a copy of this License and retain copyright, patent, trademark and disclaimer statements in the Software. 5. Disclaimer of Warranty and Limitation of Liability THE SOFTWARE AND CONTRIBUTION IN IT ARE PROVIDED WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED. IN NO EVENT SHALL ANY CONTRIBUTOR OR COPYRIGHT HOLDER BE LIABLE TO YOU FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO ANY DIRECT, OR INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING FROM YOUR USE OR INABILITY TO USE THE SOFTWARE OR THE CONTRIBUTION IN IT, NO MATTER HOW IT’S CAUSED OR BASED ON WHICH LEGAL THEORY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 6. Language THIS LICENSE IS WRITTEN IN BOTH CHINESE AND ENGLISH, AND THE CHINESE VERSION AND ENGLISH VERSION SHALL HAVE THE SAME LEGAL EFFECT. IN THE CASE OF DIVERGENCE BETWEEN THE CHINESE AND ENGLISH VERSIONS, THE CHINESE VERSION SHALL PREVAIL. END OF THE TERMS AND CONDITIONS How to Apply the Mulan Permissive Software License,Version 2 (Mulan PSL v2) to Your Software To apply the Mulan PSL v2 to your work, for easy identification by recipients, you are suggested to complete following three steps: i Fill in the blanks in following statement, including insert your software name, the year of the first publication of your software, and your name identified as the copyright owner; ii Create a file named “LICENSE” which contains the whole context of this License in the first directory of your software package; iii Attach the statement to the appropriate annotated syntax at the beginning of each source file. Copyright (c) [Year] [name of copyright holder] [Software Name] is licensed under Mulan PSL v2. You can use this software according to the terms and conditions of the Mulan PSL v2. You may obtain a copy of Mulan PSL v2 at: http://license.coscl.org.cn/MulanPSL2 THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. See the Mulan PSL v2 for more details.

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