Puppet: Open-source system configuration and management tool. With virtualization and cloud computing growth, automated cluster management is critical for data centers. Puppet manages large-scale clusters…
Issue 1. Inconsistent Mesos Leader Election 鈥?Use the following command to check the logs inside the mesos-master container and see which server it identifies as the Mesos leader.
Different servers may elect different leaders!!
The root cause of this issue is currently unknown; it is suspected that time discrepancies between different machines might be …
1. Preparatory Work:
Environment (using mesos/marathon latest version 1.5.x as of March 3, 2018 as an example):
centos7.x
mesos1.5.x
marathon1.5.x
jdk 1.8.x
192.168.0.206 mesos (master+slave)+marathon+zookeeper
192.168.0.207 mesos …
1. Download the latest installation package:
cd /home
wget http://mirror.cnop.net/apache/zookeeper/zookeeper-3.4.10.tar.gz
tar zxvf zookeeper-3.4.10.tar.gz && mv zookeeper-3.4.10 zookeeper && cd zookeeper/conf && cp zoo …
Many people have discussed Mesos, but I never fully understood what problems it actually solves or what its use cases are. Zhou Weitao (one of the early adopters of Docker, Mesos, and related technologies in China) describes it in one sentence: Mesos can manage CPU, memory, and other resources on each machine, allowing you to…
Recently while testing datax to sync MySQL, an error occurred on the second execution. The error message is as follows:
The reason is: "writeMode": "update" , by default if not specified it won’t insert, so running it again will cause an error.
After modification, it looks like this:
…
How to Fix DataX MySQL Sync Error: Failed to Retrieve Table Column Info
When using DataX to sync MySQL, an error occurs: Failed to retrieve table column information.
Solution: Check the relevant table and column names based on the error message, as shown below:
The message above indicates that the column “seting” in the table could not be retrieved. Upon inspection, the original column should actually be “sett …
Recently, while configuring an nginx+tomcat+memcached cluster for session management, an error occurred. The method used the relatively efficient kryo approach.
Error message:
Caused by: com.esotericsoftware.kryo.SerializationException: Unable to deserialize object o …
Qin Jun currently works on the operations platform of Meizu’s Flyme Platform R&D Department, responsible for system operations of the Flyme foundational platform and having experienced server scaling from hundreds to thousands of units. He possesses in-depth knowledge of Meizu’s foundational network, system deployment and delivery, and resource operations cost verification. He is currently responsible for the IaaS …
Environment Requirements:
Linux system (using my CentOS as an example)
Tomcat or TomEE
Maven (typically already available on most systems)
I. Jenkins Download
Download URL: http://jenkins-ci.org/
II. Installation
We won’t go into detail about Tomcat installation here; if you’re unfamiliar with it, you can find previous articles on this site.
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