sudo subscription-manager register username:xxxx password:xxxxx sudo subscription-manager repos -enable ansible-2.9-for-rhel-8-x86_64-rpms subscription-manager release-list subscription-manager release – unset & amp; & amp; subscription-manager release – set=8.7 sudo yum install ansible Note: When encountering the following installation failure problems $ sudo yum -y install ansible Updating Subscription Management repositories. Red Hat Enterprise Linux 8 for x86_64 – AppStream […]
Tag: ansi
Kubernetes cluster expansion
1. Please explain the basic concepts and principles of Kubernetes cluster expansion. Basic concepts and principles of Kubernetes cluster expansion: Kubernetes is an open source container orchestration platform used to automate the deployment, scaling and management of application containers. In Kubernetes, cluster expansion refers to increasing the computing resources (such as CPU, memory, etc.) in […]
STL–vector container (construction, traversal, insertion and deletion, capacity size, data access, dynamic expansion, etc.)
vector Foreword In the past few days, I have used STL a lot when writing code, and I have also felt the power of STL, so I reviewed the content of STL again, and summarized and extracted some basic things and important content. This is a vector article . C++’s STL provides us with many […]
Ansible playbook
Ansible playbook format 1. Format introduction The playbook is written in YMAL language. YAML ( /?j?m?l/ ) references many other languages, including: XML, C language, Python, Perl, and the email format RFC2822. Clark Evans first published this language in May 2001. In addition Ingy d?t Net and Oren Ben-Kiki are also co-designers of this language. […]
FOFA asset expansion practice: revealing the whereabouts of the “Silver Fox”
Write in front FOFA is very advantageous in terms of asset and thread extension, but many masters don’t quite understand how to operate it and which features should be extracted. Where do the clues to look out for come from? Which syntax can be used to achieve line extension? The main reason is the lack […]
[CSS] transition, transform and animation
1.CSS transition Introduction Usually when a CSS property value changes, the browser will immediately update the corresponding style. A transition function has been added to CSS3, through which we can smoothly transition elements from one style to another within a specified time, similar to a simple animation, but without resorting to flash or JavaScript. In […]
Task execution control in Ansible
1. Loop Loop iteration task 1. Simple loop loop: ##Assignment list – value1 – value2 -… {<!– –>{item}} ##Iteration variable name #Example# — – name: create file hosts: 172.25.0.254 tasks: – name: file module file: name: /mnt/{<!– –>{item}} state: present loop: – westos_file1 – westos_file2 2. Circular hash or dictionary list — – name: create […]
Variables and encryption in Ansible
1. Variable naming Like most programming languages, ansible’s built-in keywords cannot be used as variable names, including numbers, underscores, and letters. They can only start with underscores or letters. 2. Variable level Global: set from the command line or configuration file paly: set in play and related structures Host: a task consisting of a checklist, […]
Redis Twemproxy cluster, horizontal expansion, expansion plan
Article directory I. Overview 2. Twemproxy distribution mode 3. Test planning 4. Redis service instance preparation 4.1 Configure Redis instance 4.2 Create related resources 4.3 Start the Redis service instance 5. Twemproxy installation preparation 6. Twemproxy installation and cluster configuration 6.1 Install Twemproxy 6.2 Configuring Twemproxy 6.3 Start twemproxy 6.4 Testing the twemproxy cluster If […]
Advanced Python Algorithm: Construction of multi-stage decision-making problems and state transition equations
Advanced Python Algorithm: Construction of multi-stage decision-making problems and state transition equations Introduction 1. Introduction to multi-stage decision-making problems 2. Basics of dynamic programming 3. State transition equation 4. Case: Production planning problem 5. Python implementation 6. Summary Introduction Multi-stage decision-making problems are a type of problem that require a series of decisions to be […]