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feat: add ability to upgrade service image and image-version

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This commit is contained in:
Jose Diaz-Gonzalez
2018-10-10 00:13:59 -04:00
parent 265410e5e5
commit 284ffa3177
4 changed files with 68 additions and 3 deletions
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1
README.md
View File

@@ -46,6 +46,7 @@ mysql:start <name> Start a previously stopped mysql service
mysql:stop <name> Stop a running mysql service
mysql:unexpose <name> Unexpose a previously exposed mysql service
mysql:unlink <name> <app> Unlink the mysql service from the app
mysql:upgrade <name> Upgrade service <service> to the specified version
```
## usage

23
common-functions
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@@ -273,6 +273,18 @@ service_backup_unset_encryption() {
rm -rf "$SERVICE_BACKUP_ENCRYPTION_ROOT"
}
service_container_rm() {
declare desc="Stops a service and removes the running container"
declare SERVICE="$1"
local SERVICE_NAME="$(get_service_name "$SERVICE")"
service_stop "$SERVICE"
dokku_log_info2_quiet "Removing container"
if ! docker rm "$SERVICE_NAME" > /dev/null 2>&1; then
dokku_log_fail "Unable to stop container for service $SERVICE"
fi
}
service_enter() {
declare desc="enters running app container of specified proc type"
declare SERVICE="$1" && shift 1
@@ -300,6 +312,17 @@ service_exposed_ports() {
done
}
service_image_exists() {
declare desc="Checks if the current image exists"
local IMAGE="$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION"
if [[ "$(docker images -q "$IMAGE" 2> /dev/null)" == "" ]]; then
return 0
fi
return 1
}
service_info() {
declare desc="Retrieves information about a given service"
declare SERVICE="$1" INFO_FLAG="$2"

5
functions
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@@ -29,7 +29,7 @@ service_create() {
service_parse_args "${@:2}"
if ! docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " ; then
if ! service_image_exists "$SERVICE"; then
if [[ "$PLUGIN_DISABLE_PULL" == "true" ]]; then
dokku_log_warn "${PLUGIN_DISABLE_PULL_VARIABLE} environment variable detected. Not running pull command." 1>&2
dokku_log_warn " docker pull ${IMAGE}" 1>&2
@@ -127,7 +127,6 @@ service_start() {
dokku_log_info2_quiet "Starting container"
local PREVIOUS_ID=$(docker ps -f status=exited | grep -e "$SERVICE_NAME$" | awk '{print $1}') || true
local IMAGE_EXISTS=$(docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " && true)
local ROOTPASSWORD="$(cat "$SERVICE_ROOT/ROOTPASSWORD")"
local PASSWORD="$(cat "$SERVICE_ROOT/PASSWORD")"
@@ -135,7 +134,7 @@ service_start() {
docker start "$PREVIOUS_ID" > /dev/null
service_port_unpause "$SERVICE"
dokku_log_info2 "Container started"
elif $IMAGE_EXISTS && [[ -n "$ROOTPASSWORD" ]] && [[ -n "$PASSWORD" ]]; then
elif service_image_exists "$SERVICE" && [[ -n "$ROOTPASSWORD" ]] && [[ -n "$PASSWORD" ]]; then
service_create_container "$SERVICE"
else
dokku_log_verbose_quiet "Neither container nor valid configuration exists for $SERVICE"

42
subcommands/upgrade Executable file
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@@ -0,0 +1,42 @@
#!/usr/bin/env bash
source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$PLUGIN_BASE_PATH/common/functions"
source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
service-upgrade-cmd() {
#E you can upgrade an existing service to a new image or image-version
#E dokku $PLUGIN_COMMAND_PREFIX:upgrade lolipop
#A service, service to run command against
#F -c|--custom-env "USER=alpha;HOST=beta", semi-colon delimited environment variables to start the service with
#F -i|--image IMAGE, the image name to start the service with
#F -i|--image-version IMAGE_VERSION, the image version to start the service with
declare desc="upgrade service <service> to the specified versions"
local cmd="$PLUGIN_COMMAND_PREFIX:upgrade" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
declare SERVICE="$1" CLONE_FLAGS_LIST="${@:2}"
is_implemented_command "$cmd" || dokku_log_fail "Not yet implemented"
[[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a name for the service"
verify_service_name "$SERVICE"
local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
local ID="$(cat "$SERVICE_ROOT/ID")"
is_container_status "$ID" "Running" || dokku_log_fail "Service ${SERVICE} container is not running"
PLUGIN_IMAGE=$(service_version "$SERVICE" | grep -o "^.*:" | sed -r "s/://g")
PLUGIN_IMAGE_VERSION=$(service_version "$SERVICE" | grep -o ":.*$" | sed -r "s/://g")
service_parse_args "${@:2}"
if ! service_image_exists "$SERVICE"; then
dokku_log_fail "Unable to proceed with upgrade, image ${PLUGIN_IMAGE}:${PLUGIN_IMAGE_VERSION} does not exist"
fi
dokku_log_info2 "Stopping $SERVICE"
service_container_rm "$NEW_SERVICE"
dokku_log_info2 "Upgrading $SERVICE @ $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION"
service_start "$NEW_SERVICE" "${@:2}"
dokku_log_info2 "Done"
}
service-upgrade-cmd "$@"