1 changed files with 540 additions and 0 deletions
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#!/bin/bash |
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## compose: no-hooks |
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if [ -z "$SERVICE_DATASTORE" ]; then |
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echo "This script is meant to be run through 'compose' to work properly." >&2 |
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exit 1 |
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fi |
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version=0.1 |
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usage="$exname [-h|--help] [--force|-f] [TARGET_VERSION]" |
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help=" |
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USAGE: |
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$usage |
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DESCRIPTION: |
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Migrate the current $SERVICE_NAME service to given target version. Don't |
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forget to change your \`\`compose.yml\`\` accordingly afterwards. |
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EXAMPLES: |
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$exname 21.0.0 |
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" |
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no_hint= |
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force= |
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target= |
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while [ "$1" ]; do |
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case "$1" in |
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"--help"|"-h") |
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print_help >&2 |
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exit 0 |
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;; |
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"--force"|"-f") |
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force=yes |
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;; |
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"--color"|"-c") |
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ansi_color yes |
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;; |
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"--no-hint") |
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no_hint=yes |
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;; |
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--*|-*) |
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err "Unexpected optional argument '$1'" |
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print_usage >&2 |
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exit 1 |
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;; |
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*) |
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[ -z "$target" ] && { target=$1 ; shift ; continue ; } |
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err "Unexpected positional argument '$1'" |
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print_usage >&2 |
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exit 1 |
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;; |
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esac |
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shift |
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done |
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postgres:image:version() { |
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local image="$1" image_version |
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## XXXvlab: why not always use the pragmatic second method ? |
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if [[ "${image}" =~ ^.*:[0-9]+.[0-9]+.[0-9]+$ ]]; then |
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debug "Infering postgres's version from image's name $image" |
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image_version="${image#*:}" |
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image_version="${image_version%-myc}" |
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else |
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debug "Looking for postgres's version in image $image" |
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if ! out=$(docker run --rm -i --entrypoint postgres "$image" --version); then |
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err "Couldn't infer image '$image' postgres's version." |
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exit 1 |
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fi |
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## Expected `$out` content of the form of: 'postgres (PostgreSQL) 10.14' |
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out=${out%%$'\n'*} |
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out=${out%%$'\r'*} |
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image_version=${out#"postgres (PostgreSQL) "}.0 |
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## check if this is a version |
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if ! [[ "$image_version" =~ ^[0-9]+.[0-9]+.[0-9]+$ ]]; then |
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err "Couldn't infer image '$image' postgres's version: invalid version." |
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exit 1 |
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fi |
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fi |
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echo "$image_version" |
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} |
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postgres:container:version() { |
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local container="$1" |
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if ! out=$(docker exec -i "$container" postgres --version); then |
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err "Couldn't infer container's '$container' postgres's version." |
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exit 1 |
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fi |
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out=${out%%$'\n'*} |
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out=${out%%$'\r'*} |
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image_version=${out#"postgres (PostgreSQL) "}.0 |
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## check if this is a version |
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if ! [[ "$image_version" =~ ^[0-9]+.[0-9]+.[0-9]+$ ]]; then |
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err "Couldn't infer image '$image' postgres's version: invalid version '$image_version'." |
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exit 1 |
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fi |
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echo "$image_version" |
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} |
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postgres:container:psql () { |
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local container="$1" |
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docker exec -i "$container" psql 2>&1 |
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} |
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current_image_version=$(postgres:image:version "${DOCKER_BASE_IMAGE}") || exit 1 |
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if ! [[ "$current_image_version" =~ ^[0-9]+.[0-9]+.[0-9]+$ ]]; then |
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err "Current postgres version ${WHITE}$current_image_version${NORMAL} is unsupported yet." |
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exit 1 |
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fi |
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starting_image_version=$current_image_version |
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## This next line has to be on stdout, it is used by `vps` to get information |
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info "Current postgres version: ${WHITE}$current_image_version${NORMAL}" 2>&1 |
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last_available_versions=( |
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$(DEBUG= docker:tags:fetch docker.0k.io/postgres 30 '[0-9]+\.[0-9]+\.[0-9]+-myc$' | |
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sed -r 's/-myc$//g' | |
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sort -rV) |
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) |
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debug "Last available versions: ${WHITE}${last_available_versions[*]}${NORMAL}" |
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if [ -z "$target" ]; then |
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info "Latest version available: ${WHITE}${last_available_versions[0]}${NORMAL}" |
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fi |
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## XXXvlab: put this in kal-shlib-common |
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version_gt() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1"; } |
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last_upgradable_versions=() |
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for v in "${last_available_versions[@]}"; do |
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if version_gt "$v" "$current_image_version"; then |
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last_upgradable_versions+=("$v") |
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fi |
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done |
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if [ "${#last_upgradable_versions[@]}" == 0 ]; then |
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if [ -n "$target" ] && [ "$target" != "$current_image_version" ]; then |
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warn "Provided target version ${WHITE}$target${NORMAL} is likely incorrect." |
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echo " It is either non-existent and/or inferior to current version." >&2 |
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fi |
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## This next line has to be on stdout, it is used by `vps` to get information |
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info "${DARKYELLOW}postgres${NORMAL} is already ${GREEN}up-to-date${NORMAL}." 2>&1 |
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exit 0 |
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fi |
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if [ -z "$target" ]; then |
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info "Target latest version: ${WHITE}${last_upgradable_versions[0]}${NORMAL}" |
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target=${last_upgradable_versions[0]} |
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else |
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if [[ " ${last_available_versions[*]} " != *" $target "* ]]; then |
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err "Invalid version $target selected, please specify one of:" |
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for v in "${last_upgradable_versions[@]}"; do |
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echo " - $v" |
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done >&2 |
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exit 1 |
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fi |
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last_upgradable_versions_filtered=() |
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info "Target version ${WHITE}$target${NORMAL}" |
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for v in "${last_upgradable_versions[@]}"; do |
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if [ "$target" == "$v" ] || version_gt "$target" "$v"; then |
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last_upgradable_versions_filtered+=("$v") |
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fi |
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done |
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last_upgradable_versions=("${last_upgradable_versions_filtered[@]}") |
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fi |
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debug "Last upgradable versions: ${WHITE}${last_upgradable_versions[*]}${NORMAL}" |
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upgrade_path=($(printf "%s\n" "${last_upgradable_versions[@]}" | sort -V | tail -n 1)) |
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containers="$(get_running_containers_for_service "$SERVICE_NAME")" |
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debug "Running containers for service $SERVICE_NAME: $containers" |
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debug "Upgrade path: ${WHITE}${upgrade_path[@]}${NORMAL}" |
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container_stopped=() |
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if [ -n "$containers" ]; then |
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#err "Running container(s) for $DARKYELLOW$SERVICE_NAME$NORMAL are still running:" |
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for container in $containers; do |
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debug "Stopping container $container" |
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docker stop "$container" >/dev/null || { |
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err "Failed to stop container '$container'." |
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exit 1 |
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} |
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## We need to delete it as otherwise, on final ``compose --debug up`` |
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## it won't be recreated, and it will not be the correct version. |
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docker rm "$container" > /dev/null || { |
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err "Couldn't delete container '$container'." |
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} |
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container_stopped+=("$container") |
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done |
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fi |
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## XXXvlab: taking first container is probably not a good idea |
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container="$(echo "$containers" | head -n 1)" |
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settmpdir MIGRATION_TMPDIR |
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debug "Migration temporary directory: $MIGRATION_TMPDIR" |
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set -o pipefail |
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( |
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. "$CHARM_PATH/lib/common" |
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cp "$LOCAL_DB_PASSFILE" "$MIGRATION_TMPDIR/pgpass" |
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) |
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current_image="docker.0k.io/postgres:${current_image_version}-myc" |
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if ! docker_has_image "$current_image"; then |
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out=$(docker pull "$current_image" 2>&1) || { |
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err "Couldn't pull image $current_image:" |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " >&2 |
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exit 1 |
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} |
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fi |
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migration_backup_dirs=() |
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## In postgres, it seems it is not useful to have a path. So path is |
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## only one step here. |
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failed= |
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while [[ "${#upgrade_path[@]}" != 0 ]]; do |
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image_version="${upgrade_path[0]}" |
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if version_gt "$image_version" 12; then |
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docker_version=$(docker info --format '{{.ServerVersion}}') |
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if ! version_gt "$docker_version" 20.10.0; then |
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err "Sorry, ${DARKYELLOW}$SERVICE_NAME${NORMAL} ${WHITE}$image_version${NORMAL}" \ |
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"require docker version >= 20.10 (current: $docker_version)" |
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break |
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fi |
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fi |
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upgrade_path=("${upgrade_path[@]:1}") |
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## Prevent build of image instead of pulling it |
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while true; do |
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info "Upgrading step ${WHITE}$current_image_version${NORMAL} => ${WHITE}$image_version${NORMAL}" |
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rm -f "$MIGRATION_TMPDIR/dump-${current_image_version}.log" && |
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touch "$MIGRATION_TMPDIR/dump-${current_image_version}.log" |
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rm -f "$MIGRATION_TMPDIR/migration-${current_image_version}_${image_version}.log" && |
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touch "$MIGRATION_TMPDIR/migration-${current_image_version}_${image_version}.log" |
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uuid=$(openssl rand -hex 16) |
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## Generate dump with pg_dumpall of current version: |
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( |
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{ |
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cmd=( |
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compose --no-hooks |
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--add-compose-content="$SERVICE_NAME: |
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docker-compose: |
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image: docker.0k.io/postgres:${current_image_version}-myc |
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hostname: $SERVICE_NAME |
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" |
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run --rm --label "migration-uuid=$uuid" "$SERVICE_NAME" |
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) |
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echo COMMAND: "${cmd[@]}" |
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"${cmd[@]}" 2>&1 |
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echo "ERRORLEVEL: $?" |
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} | tee "$MIGRATION_TMPDIR/dump-${current_image_version}.log" >/dev/null |
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) & |
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pid="$!" |
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debug "Dumping container of $SERVICE_NAME in ${WHITE}$current_image_version${NORMAL}" \ |
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"launched with PID ${YELLOW}$pid${NORMAL}" |
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expected_stop="" |
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unexpected_stop="" |
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errlvl="" |
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while read -r line; do |
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case "$line" in |
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*" database system is ready to accept connections"*) |
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migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}') |
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if [ -z "$migration_container" ]; then |
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err "Couldn't find migration container for $current_image_version" |
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echo " despite catched line stating postgres is listening." >&2 |
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break 3 |
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fi |
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## dump all |
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debug "Start dumping postgres database of ${WHITE}$current_image_version${NORMAL}" |
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if ! out=$( |
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{ |
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docker exec -u 70 "${migration_container}" pg_dumpall | |
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gzip > "$MIGRATION_TMPDIR/dump.sql.gz" |
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} 2>&1 ); then |
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err "Failed to dump postgres database." |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " |
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unexpected_stop="1" |
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break |
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fi |
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out=$(docker stop "$migration_container" 2>&1) || { |
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err "Failed to stop the dump container $migration_container for $current_image_version:" |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " |
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break 3 |
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} |
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expected_stop="1" |
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debug "Interrupting server process after dump (${YELLOW}$pid${NORMAL})" >&2 |
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kill "$pid" |
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errlvl="0" |
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break |
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;; |
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*"getaddrinfo(\"$SERVICE_NAME\") failed: Name or service not known"*) |
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err "Postgres issue with resolving '$SERVICE_NAME'" |
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failed=1 |
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break 3 |
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;; |
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"ERRORLEVEL: "*) |
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unexpected_stop="1" |
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errlvl="${line#ERRORLEVEL: }" |
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err "Unexpected stop of postgres dump container with errorlevel $errlvl" |
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break |
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;; |
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esac |
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done < <(tail -f "$MIGRATION_TMPDIR/dump-${current_image_version}.log") |
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[ "$unexpected_stop" == "1" ] && { |
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migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}') |
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if [ -n "$migration_container" ]; then |
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err "Stopping dumping docker container '$migration_container' after failure" |
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docker stop "$migration_container" >/dev/null 2>&1 || true |
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fi |
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failed=1 |
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break |
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} |
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[ "$expected_stop" == "1" ] && { |
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out=$(docker rmi "$current_image" 2>&1) || { |
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err "Failed to remove image $current_image" |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " |
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break 2 |
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} |
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} |
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next_image="docker.0k.io/postgres:${image_version}-myc" |
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if ! docker_has_image "$next_image"; then |
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out=$(docker pull "$next_image" 2>&1) || { |
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err "Couldn't pull image $next_image:" |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " >&2 |
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unexpected_stop=1 |
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break 2 |
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} |
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fi |
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rm -f "$MIGRATION_TMPDIR/dump-${current_image_version}.log" |
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uuid=$(openssl rand -hex 16) |
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mv "$SERVICE_DATASTORE"{,".migration-${current_image_version}-${uuid}"} 2>&1 || { |
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err "Couldn't move datastore to backup location for $SERVICE_NAME" |
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unexpected_stop=1 |
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break 2 |
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} |
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migration_backup_dirs+=("$SERVICE_DATASTORE.migration-${current_image_version}-${uuid}") |
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( |
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{ |
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cmd=( |
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compose --debug |
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--add-compose-content="$SERVICE_NAME: |
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docker-compose: |
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image: docker.0k.io/postgres:${image_version}-myc |
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hostname: $SERVICE_NAME |
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" |
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run --rm --label "migration-uuid=$uuid" "$SERVICE_NAME" |
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) |
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echo COMMAND: "${cmd[@]}" |
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"${cmd[@]}" 2>&1 |
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echo "ERRORLEVEL: $?" |
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} | tee "$MIGRATION_TMPDIR/migration-${current_image_version}_${image_version}.log" >/dev/null |
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) & |
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pid="$!" |
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debug "Migration launched with PID ${YELLOW}$pid${NORMAL}" |
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expected_stop="" |
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unexpected_stop="" |
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errlvl="" |
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while read -r line; do |
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case "$line" in |
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*" database system is ready to accept connections"*) |
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|
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migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}') |
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## dump all |
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debug "Start restoring in postgres database ${WHITE}$current_image_version${NORMAL}" |
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if ! out=$( |
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{ |
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gunzip -c "$MIGRATION_TMPDIR/dump.sql.gz" | |
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docker exec -i -u 70 "${migration_container}" psql |
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} 2>&1 ); then |
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err "Failed to restore postgres database." |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " |
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unexpected_stop="1" |
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break |
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fi |
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|
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current_image="$next_image" |
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current_image_version="$image_version" |
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out=$(docker stop "$migration_container" 2>&1) || { |
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err "Failed to stop the migration container $migration_container for $image_version:" |
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printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " |
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break 3 |
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} |
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expected_stop="1" |
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debug "Interrupting server process after migration (${YELLOW}$pid${NORMAL})" >&2 |
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kill "$pid" |
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errlvl="0" |
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break |
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;; |
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*"getaddrinfo(\"$SERVICE_NAME\") failed: Name or service not known"*) |
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err "Postgres issue with resolving '$SERVICE_NAME'" |
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failed=1 |
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break 3 |
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;; |
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*"Replication has not yet been configured"*) |
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warn "Postgres was not setup right away, could lead to issues" |
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;; |
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"ERRORLEVEL: "*) |
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unexpected_stop="1" |
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errlvl="${line#ERRORLEVEL: }" |
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err "Unexpected stop of postgres migration container with errorlevel $errlvl" |
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failed=1 |
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break |
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;; |
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esac |
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done < <(tail -f "$MIGRATION_TMPDIR/migration-${current_image_version}_${image_version}.log") |
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|
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[ "$unexpected_stop" == "1" ] && { |
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migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}') |
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if [ -n "$migration_container" ]; then |
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err "Stopping dumping docker container '$migration_container' after failure" |
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docker stop "$migration_container" >/dev/null 2>&1 || true |
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fi |
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|
failed=1 |
||||
|
break |
||||
|
} |
||||
|
|
||||
|
[ "$expected_stop" == "1" ] && { |
||||
|
continue 2 |
||||
|
} |
||||
|
|
||||
|
## |
||||
|
## Damage control, there are some things we can solve |
||||
|
## |
||||
|
|
||||
|
if grep "UPGRADE PROBLEM: Found an invalid featureCompatibilityVersion document" "$MIGRATION_TMPDIR/migration.log" >/dev/null 2>&1; then |
||||
|
if [ -z "$feature_comp" ]; then |
||||
|
feature_comp=1 |
||||
|
info "Detected featureCompatibilityVersion issue, forcing upgrade from base version" |
||||
|
echo " This will have for effect to reload the current version and set the featureCompatibilityVersion" >&2 |
||||
|
upgrade_path=("$current_image_version" "$image_version" "${upgrade_path[@]}") |
||||
|
break |
||||
|
else |
||||
|
err "Already tried to mitigate featureCompatibilityVersion without success..." |
||||
|
break 2 |
||||
|
fi |
||||
|
fi |
||||
|
err "Upgrade to ${WHITE}$image_version${NORMAL} ${DARKRED}failed${NORMAL}" |
||||
|
failed=1 |
||||
|
break 2 |
||||
|
done |
||||
|
|
||||
|
done |
||||
|
|
||||
|
if [ -z "$unexpected_stop" ] && [ -z "$expected_stop" ]; then |
||||
|
migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}') |
||||
|
if [ -n "$migration_container" ]; then |
||||
|
err "Stopping migration docker container '$migration_container' after failure" |
||||
|
docker stop "$migration_container" |
||||
|
fi |
||||
|
fi |
||||
|
|
||||
|
if [ -n "$failed" ]; then |
||||
|
if [ -e "$MIGRATION_TMPDIR/dump-${current_image_version}.log" ]; then |
||||
|
echo "${WHITE}Failing dump logs:${NORMAL}" >&2 |
||||
|
cat "$MIGRATION_TMPDIR/dump-${current_image_version}.log" | prefix " ${GRAY}|${NORMAL} " >&2 |
||||
|
fi |
||||
|
if [ -e "$MIGRATION_TMPDIR/migration-${current_image_version}_${image_version}.log" ]; then |
||||
|
echo "${WHITE}Failing migration logs:${NORMAL}" >&2 |
||||
|
cat "$MIGRATION_TMPDIR/migration-${current_image_version}_${image_version}.log" | prefix " ${GRAY}|${NORMAL} " >&2 |
||||
|
fi |
||||
|
fi |
||||
|
|
||||
|
if [ -n "$unexpected_stop" ]; then |
||||
|
if [ -e "$SERVICE_DATASTORE.migration-${current_image_version}-${uuid}" ]; then |
||||
|
if [ -e "$SERVICE_DATASTORE" ]; then |
||||
|
mv -v "$SERVICE_DATASTORE"{,".migration-${image_version}-${uuid}-failed"} || { |
||||
|
err "Couldn't move back datastore to backup location for $SERVICE_NAME" |
||||
|
} |
||||
|
fi |
||||
|
mv -v "$SERVICE_DATASTORE"{".migration-${current_image_version}-${uuid}",} || { |
||||
|
err "Couldn't move back datastore to backup location for $SERVICE_NAME" |
||||
|
} |
||||
|
fi |
||||
|
err "Migration failed unexpectedly." |
||||
|
exit 1 |
||||
|
fi |
||||
|
|
||||
|
if [ "$starting_image_version" == "$current_image_version" ]; then |
||||
|
warn "Database not migrated. Current version is still: ${WHITE}$current_image_version${NORMAL}" >&2 |
||||
|
exit 1 |
||||
|
fi |
||||
|
|
||||
|
|
||||
|
( |
||||
|
. "$CHARM_PATH/lib/common" |
||||
|
cp "$MIGRATION_TMPDIR/pgpass" "$LOCAL_DB_PASSFILE" |
||||
|
) || { |
||||
|
err "Couldn't restore postgres password file." |
||||
|
exit 1 |
||||
|
} |
||||
|
|
||||
|
for migration_backup_dir in "${migration_backup_dirs[@]}"; do |
||||
|
out=$(rm -rf "$migration_backup_dir") || { |
||||
|
warn "Couldn't remove backup directory $migration_backup_dir" |
||||
|
printf "%s\n" "$out" | prefix " ${GRAY}|${NORMAL} " |
||||
|
} |
||||
|
done |
||||
|
## This next line has to be on stdout, it is used by `vps` to get information |
||||
|
info "${GREEN}Successfully${NORMAL} upgraded from ${WHITE}$starting_image_version${NORMAL} to ${WHITE}$current_image_version${NORMAL}" 2>&1 |
||||
|
|
||||
|
|
||||
|
|
||||
|
if [ -z "$no_hint" ]; then |
||||
|
cat <<EOF >&2 |
||||
|
Don't forget to force the version in your \`\`compose.yml\`\`. For instance: |
||||
|
|
||||
|
${DARKYELLOW}$SERVICE_NAME${NORMAL}: |
||||
|
|
||||
|
${DARKGRAY}# ...${NORMAL} |
||||
|
|
||||
|
${WHITE}docker-compose${NORMAL}: |
||||
|
${WHITE}image${NORMAL}: docker.0k.io/postgres:${current_image_version}-myc |
||||
|
|
||||
|
${DARKGRAY}# ...${NORMAL} |
||||
|
|
||||
|
You could do this automatically with: |
||||
|
|
||||
|
yq eval -i ".$SERVICE_NAME.docker-compose.image = \"docker.0k.io/postgres:${current_image_version}-myc\" // \"\"" compose.yml |
||||
|
|
||||
|
And don't forget to run \`compose up\` afterwards. |
||||
|
|
||||
|
EOF |
||||
|
fi |
||||
|
|
||||
|
exit 0 |
||||
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