Basic ZFS check

zfs_check.sh

#!/bin/bash
# This bash script does a basic information dump about the current ZFS setup.
# The output is also written into a log file in the subfolder ./logs.

# Define color variables
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

# Define the log file directory and file
LOG_DIR="./logs"
LOG_FILE="$LOG_DIR/$(date +'%Y-%m-%d_%H-%M-%S').log"

# Ensure log directory exists
mkdir -p $LOG_DIR

# Function to print section headers
print_header() {
    echo -e "${GREEN}$1${NC}"
}

# Clear the screen for a clean display
clear

{
    print_header "### ZPOOL STATUS ###"
    sudo zpool status || { echo "${RED}Failed to get zpool status${NC}"; exit 1; }

    echo ""
    print_header "### ZFS DATASETS LIST ###"
    zfs list || { echo "${RED}Failed to list ZFS datasets${NC}"; exit 1; }

    # Dynamically find all datasets
    zfs_datasets=$(zfs list -H -o name)

    echo ""
    for dataset in $zfs_datasets; do
        print_header "### SPACE & COMPRESSION for $dataset ###"
        zfs list -o space $dataset
        zfs get compression,compressratio $dataset
        echo ""
    done

    print_header "### ARC STATISTICS ###"
    python3 -W ignore /usr/sbin/arcstat 1 5 || { echo "${RED}ARC stats not available${NC}"; }

    echo ""
    print_header "### ZPOOL IOSTAT (7 seconds) ###"
    timeout 7 zpool iostat -v 2 -l || true
} | tee "$LOG_FILE"