feat: d4g-s3-backup Docker image

.dockerignore

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+.DS_Store

.github/workflows/main.yml

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+name: main
+
+on:
+  push:
+    branches:
+      - main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Run Buildx
+        run: |
+          docker buildx build \
+          --push \
+          --platform=linux/amd64,linux/arm64,linux/armhf \
+          -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest -f ./Dockerfile ./

.gitignore

@@ -1,52 +1 @@
-# Prerequisites
-*.d
-
-# Object files
-*.o
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
-
-# Debug files
-*.dSYM/
-*.su
-*.idb
-*.pdb
-
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
+.DS_Store

Dockerfile

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+FROM debian:sid-slim
+
+LABEL org.opencontainers.image.source = "https://github.com/dataforgoodfr/d4g-s3cmd"
+LABEL org.opencontainers.image.authors = "Data For Good"
+
+RUN apt update && apt install -y s3cmd && apt clean
+
+ADD ./entrypoint.sh /opt/entrypoint.sh
+
+ENTRYPOINT ["/opt/entrypoint.sh"]

README.md

@@ -1,2 +1,12 @@
-# d4g-s3cmd
-s3cmd Dockerizing for dataforgood
+# d4g-s3-backup
+
+This repository is an attempt at creating a standard Docker image used to backup our various services files.
+
+The result is a simple, fully configurable Docker image.
+
+## Usage
+Usage is documented in-script, to display the help menu use
+
+```
+docker run -it --rm ghcr.io/dataforgoodfr/d4g-s3-backup:latest help
+```

entrypoint.sh

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+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+trap cleanup SIGINT SIGTERM ERR EXIT
+
+usage() {
+  cat <<EOF
+USAGE docker run -it --rm -v /var/data:/data -v /opt/backups:/backups ghcr.io/dataforgoodfr/d4g-s3-backup \\
+  [--access-key="<access_key>"] \\
+  [--secret-key="<secret_key>"] \\
+  [--bucket-name="backups"] \\
+  [--host-base="%(bucket)s.s3.fr-par.scw.cloud"] \\
+  [--data-dir="/data"] \\
+  [--backups-dir="/backups"] \\
+  [--service-name="service"] \\
+  [--retention-days=30] \\
+  [--bucket-region="fr-par"] \\
+  [--prom-metrics] \\
+  [--debug] \\
+  [--help]
+
+Create backups for a specific dir easily and sync them to an s3 compatible bucket.
+This script also supports publishing prometheu-compatible metrics through the Textfile Collector.
+
+Data from <data_dir> will be backed up to <backups-dir>/<service-name>/<service-name>-$(date +%Y-%m-%d).tar.gz
+Files will be keps around for <retention-days> days.
+Files will be synced to s3 under s3://<bucket-name>/<service-name> using supplied credentials and configuration.
+
+Supported parameters :
+-h, --help : display this message
+--debug : Print configuration before running (Optional)
+--access-key : AWS access key (Required)
+--secret-key : AWS secret key (Required)
+--bucket-name : name of the bucket to sync backups to (Optional, Default backups)
+--data-dir : directory to backup (Optional, Default ./data)
+--service-name : name of the service to backup (Optional, Default service)
+--backups-dir : backups root directory where will be stored (Optional, Default /opt/backups/)
+--host-base : S3 host base (Optional, Default %(bucket)s.s3.fr-par.scw.cloud)
+--bucket-region : S3 bucket region (Optional, Default fr-par)
+--retention-days : number of days to keep backups (Default 30)
+--prom-metrics : enable prometheus metrics (Default false)
+EOF
+  exit 1
+}
+
+cleanup() {
+  trap - SIGINT SIGTERM ERR EXIT
+  if [ "$PROM_METRICS" == "true" ]; then
+    write_metrics
+  fi
+  exit 0
+}
+
+function write_metrics() {
+  # Write out metrics to a temporary file.
+  END="$(date +%s)"
+  # Last successful timestamp is now
+  TIMESTAMP="$END"
+  if [ "$FAILURE" != 0 ]; then
+    TIMESTAMP="0"
+  fi
+  cat << EOF > "$TEXTFILE_COLLECTOR_DIR/${SERVICE_NAME}_backup.prom.$$"
+# HELP ${SERVICE_NAME}_backup_duration Duration of the planned ${SERVICE_NAME} backup
+# TYPE ${SERVICE_NAME}_backup_duration counter
+${SERVICE_NAME}_backup_duration $((END - START))
+# HELP ${SERVICE_NAME}_backup_failure Result of the planned ${SERVICE_NAME} backup
+# TYPE ${SERVICE_NAME}_backup_failure gauge
+${SERVICE_NAME}_backup_failure $FAILURE
+# HELP ${SERVICE_NAME}_backup_last_time Timestamp of last successful backup
+# TYPE ${SERVICE_NAME}_backup_last_time gauge
+${SERVICE_NAME}_backup_last_time $TIMESTAMP
+EOF
+
+  # Rename the temporary file atomically.
+  # This avoids the node exporter seeing half a file.
+  mv "$TEXTFILE_COLLECTOR_DIR/${SERVICE_NAME}_backup.prom.$$" \
+    "$TEXTFILE_COLLECTOR_DIR/${SERVICE_NAME}_backup.prom"
+}
+
+setup_colors() {
+  if [[ -t 2 ]] && [[ -z "${NO_COLOR-}" ]] && [[ "${TERM-}" != "dumb" ]]; then
+    # shellcheck disable=SC2034
+    NOCOLOR='\033[0m' RED='\033[0;31m' GREEN='\033[0;32m' ORANGE='\033[0;33m' BLUE='\033[0;34m' PURPLE='\033[0;35m' CYAN='\033[0;36m' YELLOW='\033[1;33m'
+  else
+    echo "coucou"
+    NOCOLOR='' RED='' GREEN='' ORANGE='' BLUE='' PURPLE='' CYAN='' YELLOW=''
+  fi
+}
+
+info() {
+  echo -e "${GREEN}$*${NOCOLOR}"
+}
+
+error() {
+  echo -e "${RED}$*${NOCOLOR}"
+}
+
+debug() {
+  if [ "$DEBUG" == 'true' ]; then
+    echo -e "$1"
+  fi
+}
+
+parse_params() {
+  if [ $# -gt 12 ]; then
+    echo "Too many parameters provided"
+    usage
+  fi
+
+  # Internal variables
+  FAILURE=1
+  START="$(date +%s)"
+
+  # Sane defaults
+  DEBUG="false"
+  DATA_DIR="/data"
+  SERVICE_NAME="app"
+  BACKUPS_DIR="/backups"
+  BUCKET_NAME="backups"
+  HOST_BASE="%(bucket)s.s3.fr_par.scw.cloud"
+  BUCKET_REGION="fr-par"
+  RETENTION_DAYS="30"
+  PROM_METRICS="false"
+  ACCESS_KEY=""
+  SECRET_KEY=""
+
+  while :; do
+    case "${1-}" in
+    -h | --help)
+      usage
+      ;;
+    --debug)
+      DEBUG="true"
+      ;;
+    --access-key=*)
+      ACCESS_KEY="${1#*=}"
+      shift
+      ;;
+    --secret-key=*)
+      SECRET_KEY="${1#*=}"
+      shift
+      ;;
+    --data-dir=*)
+      DATA_DIR="${1#*=}"
+      shift
+      ;;
+    --service-name=*)
+      SERVICE_NAME="${1#*=}"
+      shift
+      ;;
+    --backups-dir=*)
+      BACKUPS_DIR="${1#*=}"
+      shift
+      ;;
+    --bucket-name=*)
+      BUCKET_NAME="${1#*=}"
+      shift
+      ;;
+    --host-base=*)
+      HOST_BASE="${1#*=}"
+      shift
+      ;;
+    --bucket-region=*)
+      BUCKET_REGION="${1#*=}"
+      shift
+      ;;
+    --retention-days=*)
+      RETENTION_DAYS="${1#*=}"
+      shift
+      ;;
+    --prom-metrics*)
+      PROM_METRICS="true"
+      shift
+      ;;
+    -?*)
+      echo "Unknown option: $1"
+      usage
+      ;;
+    *)
+      break
+      ;;
+    esac
+    shift
+  done
+
+  # Validate required parameters
+  if [ -z "${ACCESS_KEY}" ]; then
+    error "Missing required parameter: --access-key"
+    usage
+  fi
+  if [ -z "${SECRET_KEY}" ]; then
+    error "Missing required parameter: --secret-key"
+    usage
+  fi
+
+  return 0
+}
+
+
+# Create the s3 configuration
+create_s3_config() {
+  echo "" >> /.s3cfg
+  echo "use_https = True" >> /.s3cfg
+  echo "access_key = ${ACCESS_KEY}" >> /.s3cfg
+  echo "secret_key = ${SECRET_KEY}" >> /.s3cfg
+  if [ -z "${HOST_BASE}" ]; then
+      echo "host_base = ${HOST_BASE}" >> /.s3cfg
+  fi
+  if [ -z "${HOST_BUCKET}" ]; then
+    echo "host_bucket = ${HOST_BUCKET}" >> /.s3cfg
+  fi
+  if [ -z "${BUCKET_REGION}" ]; then
+    echo "bucket_location = ${BUCKET_REGION}" >> /.s3cfg
+  fi
+
+  debug "S3 configuration :"
+  debug "$(cat /.s3cfg)"
+}
+
+setup_colors
+parse_params "$@"
+create_s3_config
+
+# Create backup directory for service if it doesn't exist.
+mkdir -p "${BACKUPS_DIR}/${SERVICE_NAME}"
+
+# Cleanup backups that are older than RETENTION_DAYS days
+find "$BACKUPS_DIR/${SERVICE_NAME}" -type f -name "${SERVICE_NAME}-*.tar.gz" -mtime +"$RETENTION_DAYS" -exec rm -f {} \;
+
+cd $DATA_DIR
+tar -czf "${BACKUPS_DIR}/${SERVICE_NAME}-$(date +%Y-%m-%d).tar.gz" ./
+
+/opt/s3cmd/s3cmd --config=/.s3cfg sync "${BACKUPS_DIR}/${SERVICE_NAME}" "s3://${BUCKET_NAME}/${SERVICE_NAME}"
+FAILURE=0
+
+info "Backup completed successfully."
+if [ "$PROM_METRICS" == "true" ]; then
+  write_metrics
+fi