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377 lines
13 KiB
377 lines
13 KiB
#!/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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mongo: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 mongod'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 mongod's version in image $image"
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if ! out=$(docker run --rm -i --entrypoint mongod "$image" --version); then
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err "Couldn't infer image '$image' mongod'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=${out#db version v}
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fi
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echo "$image_version"
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}
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mongo:container:version() {
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local container="$1"
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if ! out=$(docker exec -i "$container" mongo --version); then
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err "Couldn't infer container's '$container' mongod'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=${out#db version v}
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echo "$image_version"
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}
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mongo:container:mongo () {
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local container="$1"
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docker exec -i "$container" mongo 2>&1
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}
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mongo:container:fix_compat() {
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local container="$1" image_version="$2"
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out=$(echo "db.adminCommand( { setFeatureCompatibilityVersion: \"${image_version%.*}\" } )" |
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mongo:container:mongo "$container" 2>&1)
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if [[ "$out" == *"\"ok\" : 1"* ]]; then
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debug "Feature Compatibility set to ${WHITE}${image_version%.*}${NORMAL}"
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else
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err "Failed to set feature compatibility version to ${WHITE}${image_version%.*}${NORMAL}:"
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echo "$out" | prefix " | " >&2
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return 1
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fi
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}
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mongo:container:enable_read() {
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local container="$1"
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## Enable read if db version >= 4.2
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if ! version=$(mongo:container:version "$container"); then
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err "Couldn't get container's mongod version"
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exit 1
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fi
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if version_gt "$version" 4.1; then
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cmd="db.getMongo().setSecondaryOk()"
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out=$(mongo:container:mongo "$container" <<<"$cmd") || {
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err "Failed database command. Output:"
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echo "$out" | prefix " | " >&2
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exit 1
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}
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fi
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}
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current_image_version=$(mongo:image:version "${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 mongo 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 mongo 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/mongo 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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minor="${v#*.}"
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minor="${minor%.**}"
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## In mongo versioning system, only even minor number are stable
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(( "$minor" % 2 )) && continue
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if version_gt "$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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debug "Last upgradable versions: ${WHITE}${last_upgradable_versions[*]}${NORMAL}"
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if [ "${#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}mongo${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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upgrade_path=($(printf "%s\n" "${last_upgradable_versions[@]}" | sort -rV | awk -F '.' '!seen[$1 "." $2]++ {print}' | sort -V))
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containers="$(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 '$container'."
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exit 1
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}
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docker rm "$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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set -o pipefail
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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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upgrade_path=("${upgrade_path[@]:1}")
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## Prevent build of image instead of pulling it
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next_image="docker.0k.io/mongo:${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 1
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}
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fi
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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/migration.log" && touch "$MIGRATION_TMPDIR/migration.log"
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uuid=$(openssl rand -hex 16)
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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="$SERVICE_NAME:
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docker-compose:
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image: docker.0k.io/mongo:${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: $?"
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} | tee -a "$MIGRATION_TMPDIR/migration.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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*" NETWORK "*"[initandlisten] waiting for connections on port"*|\
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*" NETWORK "*"[listener] waiting for connections on port"*|\
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*"\"NETWORK\""*"\"Waiting for connections\""*)
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migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}')
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if [ "${image_version%.*}" != "${current_image_version%.*}" ]; then
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mongo:container:enable_read "$migration_container" &&
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mongo:container:fix_compat "$migration_container" "$image_version" || {
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failed=1
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break 3
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}
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fi
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current_image="$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(\"mongo\") failed: Name or service not known"*)
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err "Mongo issue with resolving 'mongo'"
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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 "Mongo 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 mongod migration 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/migration.log")
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[ "$expected_stop" == "1" ] && {
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docker rmi "$current_image" >/dev/null 2>&1 || true
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continue 2
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}
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##
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## Damage control, there are some things we can solve
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##
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if grep "UPGRADE PROBLEM: Found an invalid featureCompatibilityVersion document" "$MIGRATION_TMPDIR/migration.log" >/dev/null 2>&1; then
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if [ -z "$feature_comp" ]; then
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feature_comp=1
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info "Detected featureCompatibilityVersion issue, forcing upgrade from base version"
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echo " This will have for effect to reload the current version and set the featureCompatibilityVersion" >&2
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upgrade_path=("$current_image_version" "$image_version" "${upgrade_path[@]}")
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break
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else
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err "Already tried to mitigate featureCompatibilityVersion without success..."
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break 2
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fi
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fi
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err "Upgrade to ${WHITE}$image_version${NORMAL} ${DARKRED}failed${NORMAL}"
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failed=1
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break 2
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done
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done
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if [ -z "$unexpected_stop" -a -z "$expected_stop" ]; then
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migration_container=$(docker ps --filter "label=migration-uuid=$uuid" --format '{{.ID}}')
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err "Stopping migration docker container '$migration_container' after failure"
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docker stop "$migration_container"
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fi
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if [ -n "$failed" ]; then
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echo "${WHITE}Failing migration logs:${NORMAL}" >&2
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cat "$MIGRATION_TMPDIR/migration.log" | prefix " ${GRAY}|${NORMAL} " >&2
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fi
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if [ "$starting_image_version" == "$current_image_version" ]; then
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warn "Database not migrated. Current version is still: ${WHITE}$current_image_version${NORMAL}" >&2
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exit 1
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fi
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## This next line has to be on stdout, it is used by `vps` to get information
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info "${GREEN}Successfully${NORMAL} upgraded from ${WHITE}$starting_image_version${NORMAL} to ${WHITE}$current_image_version${NORMAL}" 2>&1
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if [ -z "$no_hint" ]; then
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cat <<EOF >&2
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Don't forget to force the version in your \`\`compose.yml\`\`. For instance:
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${DARKYELLOW}$SERVICE_NAME${NORMAL}:
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${DARKGRAY}# ...${NORMAL}
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${WHITE}docker-compose${NORMAL}:
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${WHITE}image${NORMAL}: docker.0k.io/mongo:${current_image_version}-myc
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${DARKGRAY}# ...${NORMAL}
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You could do this automatically with:
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yq eval -i ".$SERVICE_NAME.docker-compose.image = \"docker.0k.io/mongo:${current_image_version}-myc\" // \"\"" compose.yml
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And don't forget to run \`compose up\` afterwards.
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EOF
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fi
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exit 0
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