Echo host configuration

echo_host.sh

#!/bin/bash
echo "============== RUNNING SYSTEM DIAGNOSTICS =============="

# Create output file
OUTPUT_FILE="system_diagnostics_$(hostname)_$(date +%Y%m%d).txt"
exec > >(tee -a "$OUTPUT_FILE") 2>&1

echo "=================== HOST INFORMATION ==================="
echo "Hostname: $(hostname)"
echo "Date: $(date)"

echo "=================== CPU ARCHITECTURE ==================="
# CPU model and features
echo "CPU Information:"
lscpu
echo "---"
echo "CPU Features:"
cat /proc/cpuinfo | grep flags | head -1
echo "---"
echo "CPU Microcode Version:"
cat /proc/cpuinfo | grep microcode | head -1
echo "---"
echo "CPU Vulnerabilities:"
ls -1 /sys/devices/system/cpu/vulnerabilities/ 2>/dev/null | while read vuln; do
  echo "$vuln: $(cat /sys/devices/system/cpu/vulnerabilities/$vuln 2>/dev/null)"
done

echo "================ KERNEL & OS INFORMATION ==============="
echo "Kernel version: $(uname -a)"
echo "---"
echo "OS release information:"
cat /etc/os-release
echo "---"
echo "Kernel parameters:"
sysctl -a | grep -E 'vm.swappiness|kernel.panic|kernel.randomize|kernel.sched_migration_cost'
echo "---"
echo "Memory configuration:"
free -h
echo "---"
echo "Transparent Hugepages:"
cat /sys/kernel/mm/transparent_hugepage/enabled

echo "================== DOCKER INFORMATION =================="
echo "Docker version:"
docker version
echo "---"
echo "Docker info:"
docker info
echo "---"
echo "Docker storage driver:"
docker info | grep "Storage Driver"
echo "---"
echo "Container runtime:"
docker info | grep "Runtime"

echo "================ HARDWARE CAPABILITIES ================="
echo "NUMA configuration:"
numactl --hardware 2>/dev/null || echo "numactl not available"
echo "---"
echo "Memory stats:"
cat /proc/meminfo | grep -E 'HugePages_|Hugepagesize|DirectMap'
echo "---"
echo "Hardware RNG:"
ls -la /dev/random /dev/urandom
cat /proc/sys/kernel/random/entropy_avail

echo "================ CONTAINER SPECIFIC INFO ==============="
echo "Checking container configuration:"
docker inspect 2549f85638f4 | grep -E 'CpuShares|Memory|CpusetCpus|NanoCpus|OomScoreAdj|PidsLimit'

echo "================ CPU INSTRUCTION SUPPORT ================"
# Check for AVX/AVX2/AVX512 support - often causes subtle issues with compiled code
echo "AVX Support:"
cat /proc/cpuinfo | grep -E 'avx' | head -1
echo "---"
echo "Available CPU Instructions:"
cat /proc/cpuinfo | grep flags | head -1 | tr ' ' '\n' | grep -E 'sse|avx|fma|bmi|adx|sha|aes'

echo "================== SYSTEM LOAD/HEALTH ==================="
echo "Current Load:"
uptime
echo "---"
echo "Memory Pressure:"
vmstat 1 3
echo "---"
echo "IO Pressure:"
iostat 1 3 2>/dev/null || echo "iostat not available"

echo "=================== DIAGNOSTIC COMPLETE =================="
echo "Results saved to $OUTPUT_FILE"