Root Android pixel 2 using Magisk and boot image patching

Steps to root an Android Pixel 2 phone using Magisk and boot.img patching.

Unlock bootloader

1. Enable debug mode in Android if not done already
2. Reboot Pixel 2 into bootloader
   adb reboot bootloader
3. Unlock bootloader
   fastboot flashing unlock
4. Reboot into bootloader again
   fastboot reboot
5. Enable debug mode again

Install Magisk

1. Download Magisk apk ( Magisk v25.2 or latest) https://github.com/topjohnwu/Magisk/releases
2. adb install Magisk-v25.2.apk

Get and patch boot.img

1. Download Android image for pixel2 (e.g. walleye-opd1.170816.010-factory-63083164.zip). It should be same as the installed image.
2. Unzip the image
   unzip walleye-opd1.170816.010-factory-63083164.zip -d dir1
cd dir1/walleye-opd1.170816.010
unzip image-walleye-opd1.170816.010.zip -d dir2
cd dir2
3. Push boot.img to Android device
   adb push boot.img /sdcard/Download
4. Run Magisk in phone and click on Magisk Install. Select “Select and patch file). Select boot.img and create a patch file.
5. Pull patch file to Computer using
   adb pull /sdcard/Download/magisk_patched-25200_W2fd4.img

Flash Android with patched image

1. Reboot Pixel 2 into bootloader again
   adb reboot bootloader
2. Flash patched boot image
   fastboot flash boot magisk_patched-25200_W2fd4.img reboot
3. Wait for reboot to finish and open Magisk
4. Click on Superuser tab and enable Shell. Device is not rooted.