We use EC2 Image Builder to build both Amazon Linux 2 and Red Hat Enterprise Linux based AMI as our SOE. The Ansible playbook that is included in the component installs SSM agent, but somehow we could not connect to the EC2 instance that is created from the RHEL AMI SOE via ssm session manager. … Continue reading Avoid EC2 Image Builder Remove SSM Agent
Category: Linux
/etc/sysconfig/clock is removed after yum update in Amazon Linux 2
Simple version: If you follow AWS guide Setting the Time for Your Linux Instance to use /etc/sysconfig/clock to configure the timezone in Amazon Linux 2, you may not be able to find it after a yum update. So the suggested way to adjust time is to use timedatectl. For example: sudo timedatectl set-timezone Australia/Sydney Detailed … Continue reading /etc/sysconfig/clock is removed after yum update in Amazon Linux 2
Manage Private CA file in Python
The private CA signed certificate can cause SSL error in Python if the it is not trusted. How to manage it? Well, it really depends on the Python module that you use. I will give a few examples that I have seen so far. pip Pip is the popular python package manage tool. To check … Continue reading Manage Private CA file in Python
Nginx Sample Config of HTTP and LDAPS Reverse Proxy
Nginx is a great tool for load balance, reverse proxy and more if you know Lua scripts (check out OpenResty if you are interested). Besides HTTP, Nginx can do TCP and UDP proxy as well. Here is a sample config for https > http, ldaps > ldap proxy. https://gist.github.com/jc1518/35cb055bf779f1a70a5fc6e72637407a
LDAP: error code 11 – This search operation has checked the maximum of 5000 entries for matches]
We have a Jenkins box that use OpenDJ as the LDAP authenticator. And recently we migrated the ldif data from the old OpenDJ to a new OpenDJ server, and reconfigured the Jenkins to use the new box. After that, the Jenkins authentication stops working. I noticed this message in the Jenkins log. It looks like … Continue reading LDAP: error code 11 – This search operation has checked the maximum of 5000 entries for matches]
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