DevOps on Haoxiqiang's Blog

Jenkins Setup Notes

Mon, 06 Jun 2022 17:32:20 +0000

I was working on an overseas application whose build server was originally located in Shanghai. Due to special circumstances, it needed to be migrated abroad. This post documents the Jenkins migration and configuration process.

Prerequisite: Install JDK 11

Using jenv for multi-version Java management:

# Install jenv
git clone https://github.com/jenv/jenv.git ~/.jenv
echo 'export PATH="$HOME/.jenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(jenv init -)"' >> ~/.bashrc
source ~/.bashrc

# Enable the export plugin and restart the session
jenv enable-plugin export
exec $SHELL -l

Installing Jenkins on CentOS

# Add Jenkins repository and GPG key
sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

# Install
yum install jenkins

Configuring systemd Service

sudo vi /etc/systemd/system/jenkins.service
sudo systemctl enable /etc/systemd/system/jenkins.service
sudo systemctl start jenkins
systemctl status jenkins

[Unit]
Description=jenkins service
After=network.target

[Service]
Type=simple
LimitNOFILE=65536
ExecStart=/usr/bin/jenkins
User=work
Environment="JENKINS_PORT=8082"

[Install]
WantedBy=multi-user.target

Configuring Android SDK

wget https://dl.google.com/android/repository/commandlinetools-linux-8512546_latest.zip
unzip commandlinetools-linux-8512546_latest.zip
chmod a+x cmdline-tools/

cd cmdline-tools/bin
# Install required components via sdkmanager
./sdkmanager --sdk_root=/home/work/workspace/android_sdk --list
./sdkmanager --install 'platforms;android-33' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'build-tools;33.0.0' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'cmdline-tools;7.0' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'build-tools;32.0.0' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'build-tools;31.0.0' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'ndk;25.1.8937393' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'platforms;android-28' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'platforms;android-29' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'platforms;android-30' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'platforms;android-31' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'cmake;3.22.1' --sdk_root=/home/work/workspace/android_sdk
./sdkmanager --install 'cmake;3.10.2.4988404' --sdk_root=/home/work/workspace/android_sdk

Fixing SSH Key Permission Issues

If you encounter Permissions 0664 for '/home/work/.ssh/jenkins_id_rsa' are too open:

Configuring and Optimizing Shadowsocks Rust

Fri, 06 May 2022 16:10:22 +0000

During the recent holiday, I reorganized the home network with the goal of streaming 4K content without buffering. Since I was rebuilding the server anyway, I decided to migrate from the old setup to the new shadowsocks-rust implementation.

System Update

`1`	`sudo apt update && sudo apt upgrade`

Installing and Configuring SS

Option 1: Build from Source via Cargo

# Install Rust toolchain
curl https://sh.rustup.rs -sSf | sh

# Configure Cargo environment (add to .profile / .bash_profile)
# CARGO_HOME sets the installation path
# target-cpu=native lets rustc optimize for the current CPU
CARGO_HOME=/root/cargo
RUSTFLAGS="-C target-cpu=native"
source .profile

# Install build dependencies
sudo apt install build-essential

# Install shadowsocks-rust
cargo install shadowsocks-rust

Option 2: Download Prebuilt Binary

wget https://github.com/shadowsocks/shadowsocks-rust/releases/download/v1.14.3/shadowsocks-v1.14.3.x86_64-unknown-linux-gnu.tar.xz
tar -xf shadowsocks-v1.14.3.x86_64-unknown-linux-gnu.tar.xz
cp ssserver /usr/local/bin
chmod a+x /usr/local/bin/ssserver

Configuration

1
2

mkdir /etc/shadowsocks
vi /etc/shadowsocks/config.json

{
    "server": "::",
    "server_port": 8888,
    "method": "aes-256-gcm",
    "password": "pw"
}

Test the server:

Shadowsocks Setup and Optimization

Tue, 31 Dec 2019 20:29:27 +0000

Network instability at the office was affecting work, so I set up a Shadowsocks server on my VPS for source code pulls. The steps below work on most Linux distributions and have been tested on Ubuntu 16.04 and 18.04.

2024 Update: The Python version of shadowsocks used in this guide is no longer maintained. The actively maintained implementation is shadowsocks-rust, which offers better performance and support for modern encryption protocols. For a fresh setup, refer to the shadowsocks-rust documentation. The original Python-based steps are preserved below for reference.

Some Git Operations

Thu, 10 Sep 2015 16:02:39 +0000

Basic commands are well documented elsewhere. Here are some operations I’ve found useful in real projects.