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feat: ntfy integration #107

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feat: ntfy integration #107

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5 changes: 5 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,11 @@ AUTOHEAL_DEFAULT_STOP_TIMEOUT=10 # Docker waits max 10 seconds (the Docker def
DOCKER_SOCK=/var/run/docker.sock # Unix socket for curl requests to Docker API
CURL_TIMEOUT=30 # --max-time seconds for curl requests to Docker API
WEBHOOK_URL="" # post message to the webhook if a container was restarted (or restart failed)

NTFY_URL="" # https://docs.ntfy.sh/
NTFY_TITLE="autoheal alert: unhealthy container"
NTFY_PRIORITY="urgent" # https://docs.ntfy.sh/publish/#message-priority
NTFY_TAGS="skull,rotating_light,warning" # https://docs.ntfy.sh/emojis/
```

### Optional Container Labels
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25 changes: 24 additions & 1 deletion docker-entrypoint
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Expand Up @@ -9,6 +9,12 @@ UNIX_SOCK=""
CURL_TIMEOUT=${CURL_TIMEOUT:-30}
WEBHOOK_URL=${WEBHOOK_URL:-""}

NTFY_URL=${NTFY_URL:-""}
NTFY_TITLE=${NTFY_TITLE:-"autoheal alert: unhealthy container"}
NTFY_PRIORITY=${NTFY_PRIORITY:-"urgent"} # https://docs.ntfy.sh/publish/#message-priority
NTFY_TAGS=${NTFY_TAGS:-"skull,rotating_light,warning"} # https://docs.ntfy.sh/emojis/


# only use unix domain socket if no TCP endpoint is defined
case "${DOCKER_SOCK}" in
"tcp://"*) HTTP_ENDPOINT="$(echo ${DOCKER_SOCK} | sed 's#tcp://#https://#')"
Expand Down Expand Up @@ -67,6 +73,21 @@ notify_webhook() {
fi
}

ntfy_webhook() {
local text="$@"

if [ -n "$NTFY_URL" ]
then
# execute webhook requests as background process to prevent healer from blocking
curl -X POST \
-H "Title: $NTFY_TITLE" \
-H "Priority: $NTFY_PRIORITY" \
-H "Tags: $NTFY_TAGS" \
-d "$text" \
$NTFY_URL
fi
}

# https://towardsdatascience.com/proper-ways-to-pass-environment-variables-in-json-for-curl-post-f797d2698bf3
generate_webhook_payload() {
local text="$@"
Expand Down Expand Up @@ -116,8 +137,10 @@ if [ "$1" = "autoheal" ] && [ -e "$DOCKER_SOCK" ];then
then
echo "$DATE Restarting container $CONTAINER_SHORT_ID failed" >&2
notify_webhook "Container ${CONTAINER_NAME:1} (${CONTAINER_SHORT_ID}) found to be unhealthy. Failed to restart the container!" &
else
ntfy_webhook "Container ${CONTAINER_NAME:1} (${CONTAINER_SHORT_ID}) found to be unhealthy. Failed to restart the container!" &
else
notify_webhook "Container ${CONTAINER_NAME:1} (${CONTAINER_SHORT_ID}) found to be unhealthy. Successfully restarted the container!" &
ntfy_webhook "Container ${CONTAINER_NAME:1} (${CONTAINER_SHORT_ID}) found to be unhealthy. Successfully restarted the container!" &
fi
fi
done
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