Top 10 Essential Tools Every Ops Engineer Uses Daily

Operations engineers rely on a variety of tools to automate tasks, manage configurations, monitor systems, and orchestrate containers. The following ten tools are commonly used in daily workflows, each described with its core function, typical scenarios, key advantages, and concrete examples.

1. Shell Scripts

Function: Automation of tasks and batch jobs.

Applicable scenarios: File processing, system management, simple network management.

Advantages: Flexible and powerful; can interact directly with the operating system.

Example: Batch modify configuration files on multiple servers.

#!/bin/bash
# 配置文件的路径
config_path="/path/to/config/file"

# 要修改的内容和新内容
old_content="old_value"
new_content="new_value"

# 遍历服务器上的配置文件
for file in $(find $config_path -name "*.conf"); do
  # 判断文件是否包含要修改的内容
  if grep -q "$old_content" "$file"; then
    # 修改文件内容
    sed -i "s/$old_content/$new_content/g" "$file"
    echo "已修改文件: $file"
  else
    echo "文件 $file 不包含要修改的内容."
  fi
done

2. Git

Function: Version control.

Applicable scenarios: Managing code and configuration files.

Advantages: Branch management, code rollback, team collaboration.

Example: Use Git to version Puppet or Ansible code.

3. Ansible

Function: Automated configuration, deployment, and management.

Applicable scenarios: Automating server configuration, application deployment, monitoring.

Advantages: Easy to learn, agent‑less, extensive module support.

Example: Batch configure firewall rules on servers.

# Install Ansible
pip install ansible

# Define inventory (hosts.ini) with server IPs

# Playbook example to install and start firewalld, open ports 80 and 22
---
- hosts: all
  become: yes
  tasks:
    - name: Install firewalld
      apt: name=firewalld state=present
    - name: Enable firewalld
      service: name=firewalld enabled=yes state=started
    - name: Open port 80/tcp
      firewalld: port=80/tcp permanent=true state=enabled
    - name: Open port 22/tcp
      firewalld: port=22/tcp permanent=true state=enabled

4. Prometheus

Function: Monitoring and alerting.

Applicable scenarios: System performance and service status monitoring.

Advantages: Open‑source, flexible data model, powerful query language.

Example: Monitor CPU and memory usage of servers.

5. Grafana

Function: Data visualization and dashboarding.

Applicable scenarios: Displaying metrics from Prometheus, MySQL, etc.

Advantages: Attractive UI, supports many data sources, flexible dashboard definitions.

Example: Show real‑time CPU usage of a server.

6. Docker

Function: Containerization platform.

Applicable scenarios: Application deployment, environment isolation, rapid scaling.

Advantages: Lightweight, fast deployment, ensures consistent runtime environment.

Example: Deploy a web application using Docker.

7. Kubernetes (K8s)

Function: Container orchestration and management.

Applicable scenarios: Scaling containerized applications, rolling updates, high‑availability.

Advantages: Automatic scheduling, elastic scaling, self‑healing.

Example: Manage a Docker container cluster.

8. Nginx

Function: Web server and reverse proxy.

Applicable scenarios: Serving static assets, load balancing.

Advantages: High performance, stability, simple configuration.

Example: Front‑end proxy and load balancer for web applications.

9. ELK Stack (Elasticsearch, Logstash, Kibana)

Function: Log collection and analysis.

Applicable scenarios: Centralized management and analysis of system and application logs.

Advantages: Real‑time search, powerful data analysis, intuitive dashboards.

Example: Analyze server access logs to identify the most visited pages.

10. Zabbix

Function: Comprehensive network monitoring.

Applicable scenarios: Server performance, network, and service monitoring.

Advantages: Open‑source, feature‑rich, robust alerting mechanisms.

Example: Monitor network bandwidth usage and trigger alerts when thresholds are exceeded.