OCI Free Tier로 워드프레스 블로그 만들기 - (3) Oracle Cloud ARM 기반 컴퓨트인스턴스 생성 가이드

mkdir -p ~/oci-wordpress-project cd ~/oci-wordpress-project

cd /home/opc/.oci ssh-keygen -f oci_api_key_public.pem -i -mPKCS8 > oci_api_key_openssh.pub chmod 600 oci_api_key_openssh.pub

nano create_arm_instance.sh

#!/bin/bash source ~/.bashrc # 스크립트 시작 부분에 Python 경고 메시지 무시 설정 추가 export PYTHONWARNINGS="ignore::DeprecationWarning" # 상수 정의 LOCKFILE="/tmp/wordpress_instance_creation.lock" LOGFILE="/home/opc/oci-wordpress-project/arm_instance_creation.log" MAX_RUNTIME=3600 COMPARTMENT_ID="ocid1.compartment.oc1..aaaaaaaaiemporixxxxxxxxxxxxxxxxxxxxx7aa" SUBNET_ID="ocid1.subnet.oc1.ap-chuncheon-1.aaaaaaaaxxxxxxxxxxxxxxxxxxxxxxxxx3a" IMAGE_ID="ocid1.image.oc1.ap-chuncheon-1.aaaaaaaaxxxxxxxxxxxxxxxxxxxxxxxxxxxx7a" AVAILABILITY_DOMAIN="RBOe:AP-CHUNCHEON-1-AD-1" SSH_KEY_FILE="/home/opc/.oci/oci_api_key_openssh.pub" LOG_DIR="/home/opc/oci-wordpress-project" # 로그 함수 수정 log() { local timestamp=$(date '+%Y-%m-%d %H:%M:%S') echo "$timestamp - $1" >> "$LOGFILE" } # 초기 검증 init_check() { # 로그 디렉토리 생성 if [ ! -d "$LOG_DIR" ]; then mkdir -p "$LOG_DIR" if [ $? -ne 0 ]; then log "Failed to create log directory: $LOG_DIR" return 1 fi fi # SSH 키 파일 확인 if [ ! -f "$SSH_KEY_FILE" ]; then log "SSH key file not found: $SSH_KEY_FILE" return 1 fi # OCI CLI 설치 확인 if ! command -v oci >/dev/null 2>&1; then log "OCI CLI not installed" return 1 fi return 0 } # 락 파일 확인 및 프로세스 검증 함수 check_lock() { if [ -f "$LOCKFILE" ]; then pid=$(cat "$LOCKFILE") if ps -p $pid > /dev/null 2>&1; then runtime=$(($(date +%s) - $(stat -c %Y "$LOCKFILE"))) if [ $runtime -gt $MAX_RUNTIME ]; then log "Process $pid has been running for too long. Killing it." kill -9 $pid 2>/dev/null || true rm -f "$LOCKFILE" else log "Process is already running." return 1 fi else log "Stale lock file found. Removing it." rm -f "$LOCKFILE" fi fi return 0 } # ARM 인스턴스 확인 함수 check_arm_instances() { local query_result log "Checking existing instances..." # ARM 인스턴스 검색 query_result=$(oci compute instance list \ --compartment-id "$COMPARTMENT_ID" \ --all \ --query 'data[?shape == `VM.Standard.A1.Flex`].{Shape:shape,Name:displayName}' \ --output json 2>/dev/null) # 결과 분석 if [ -n "$query_result" ] && [ "$query_result" != "[]" ]; then log "Current ARM instances:" while IFS= read -r instance; do log "$instance" done < <(echo "$query_result" | jq -r '.[] | "Instance: \(.Name), Shape: \(.Shape)"') return 0 else log "No ARM instances found. Proceeding with creation." return 1 fi } # 인스턴스 생성 함수 create_instance() { log "Creating new ARM instance..." local result result=$(oci compute instance launch \ --compartment-id "$COMPARTMENT_ID" \ --availability-domain "$AVAILABILITY_DOMAIN" \ --display-name "ARM-WordPress-Instance" \ --image-id "$IMAGE_ID" \ --subnet-id "$SUBNET_ID" \ --shape "VM.Standard.A1.Flex" \ --assign-public-ip true \ --assign-private-dns-record true \ --shape-config '{"ocpus":4,"memoryInGBs":24}' \ --availability-config '{"recoveryAction": "RESTORE_INSTANCE"}' \ --instance-options '{"areLegacyImdsEndpointsDisabled": false}' \ --ssh-authorized-keys-file "$SSH_KEY_FILE" 2>&1) if [ $? -ne 0 ]; then log "Error creating instance: $(echo "$result" | jq -r '.message // empty')" return 1 fi return 0 } # 메인 로직 main() { log "Script started" # 초기 검증 if ! init_check; then log "Initialization failed" exit 1 fi # ARM 인스턴스 확인 if check_arm_instances; then log "Existing ARM instance found. Exiting." exit 0 fi # 락 확인 if ! check_lock; then log "Lock check failed" exit 1 fi # 락 파일 생성 echo $$ > "$LOCKFILE" log "Lock acquired, proceeding with instance creation" # 인스턴스 생성 if create_instance; then log "Instance created successfully" else log "Failed to create instance" rm -f "$LOCKFILE" exit 1 fi # 락 파일 제거 rm -f "$LOCKFILE" log "Lock released" } # 스크립트 종료 시 락파일 제거 trap 'rm -f "$LOCKFILE"; log "Script interrupted, lock file removed"; exit' INT TERM EXIT # 스크립트 실행 main

chmod +x ~/oci-wordpress-project/create_arm_instance.sh

crontab -e

*/2 * * * * /home/opc/oci-wordpress-project/create_arm_instance.sh >> /home/opc/oci-wordpress-project/arm_instance_creation.log 2>&1

2024-10-20 16:10:00 - Script started 2024-10-20 16:10:02 - No ARM instances found. Proceeding with instance creation. 2024-10-20 16:10:02 - Lock acquired, proceeding with instance creation ServiceError: { "client_version": "Oracle-PythonSDK/2.136.0, Oracle-PythonCLI/3.49.2", "code": "InternalError", "logging_tips": "Please run the OCI CLI command using --debug flag to find more debug information.", "message": "Out of host capacity.", "opc-request-id": "3678EFA9DB1045AA886E4023D0A12461/A7AEF1E7031C4DC29738786FF84FB4DD/F09B6B83637BE353511245BAC0AE7005", "operation_name": "launch_instance", "request_endpoint": "POST https://iaas.ap-chuncheon-1.oraclecloud.com/20160918/instances", "status": 500, "target_service": "compute", "timestamp": "2024-10-20T07:11:42.498186+00:00", "troubleshooting_tips": "See [https://docs.oracle.com/iaas/Content/API/References/apierrors.htm] for more information about resolving this error. If you are unable to resolve this issue, run this CLI command with --debug option and contact Oracle support and provide them the full error message." } 2024-10-20 16:11:43 - Failed to create instance 2024-10-20 16:11:43 - Lock released 2024-10-20 16:11:43 - Script interrupted, lock file removed