diff options
Diffstat (limited to 'cmd/zed')
| -rw-r--r-- | cmd/zed/zed.d/zed-functions.sh | 78 | ||||
| -rw-r--r-- | cmd/zed/zed.d/zed.rc | 8 |
2 files changed, 86 insertions, 0 deletions
diff --git a/cmd/zed/zed.d/zed-functions.sh b/cmd/zed/zed.d/zed-functions.sh index a6e608573..44a9b8d23 100644 --- a/cmd/zed/zed.d/zed-functions.sh +++ b/cmd/zed/zed.d/zed-functions.sh @@ -202,6 +202,10 @@ zed_notify() [ "${rv}" -eq 0 ] && num_success=$((num_success + 1)) [ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1)) + zed_notify_slack_webhook "${subject}" "${pathname}"; rv=$? + [ "${rv}" -eq 0 ] && num_success=$((num_success + 1)) + [ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1)) + [ "${num_success}" -gt 0 ] && return 0 [ "${num_failure}" -gt 0 ] && return 1 return 2 @@ -359,6 +363,80 @@ zed_notify_pushbullet() } +# zed_notify_slack_webhook (subject, pathname) +# +# Notification via Slack Webhook <https://api.slack.com/incoming-webhooks>. +# The Webhook URL (ZED_SLACK_WEBHOOK_URL) identifies this client to the +# Slack channel. +# +# Requires awk, curl, and sed executables to be installed in the standard PATH. +# +# References +# https://api.slack.com/incoming-webhooks +# +# Arguments +# subject: notification subject +# pathname: pathname containing the notification message (OPTIONAL) +# +# Globals +# ZED_SLACK_WEBHOOK_URL +# +# Return +# 0: notification sent +# 1: notification failed +# 2: not configured +# +zed_notify_slack_webhook() +{ + [ -n "${ZED_SLACK_WEBHOOK_URL}" ] || return 2 + + local subject="$1" + local pathname="${2:-"/dev/null"}" + local msg_body + local msg_tag + local msg_json + local msg_out + local msg_err + local url="${ZED_SLACK_WEBHOOK_URL}" + + [ -n "${subject}" ] || return 1 + if [ ! -r "${pathname}" ]; then + zed_log_err "slack webhook cannot read \"${pathname}\"" + return 1 + fi + + zed_check_cmd "awk" "curl" "sed" || return 1 + + # Escape the following characters in the message body for JSON: + # newline, backslash, double quote, horizontal tab, vertical tab, + # and carriage return. + # + msg_body="$(awk '{ ORS="\\n" } { gsub(/\\/, "\\\\"); gsub(/"/, "\\\""); + gsub(/\t/, "\\t"); gsub(/\f/, "\\f"); gsub(/\r/, "\\r"); print }' \ + "${pathname}")" + + # Construct the JSON message for posting. + # + msg_json="$(printf '{"text": "*%s*\n%s"}' "${subject}" "${msg_body}" )" + + # Send the POST request and check for errors. + # + msg_out="$(curl -X POST "${url}" \ + --header "Content-Type: application/json" --data-binary "${msg_json}" \ + 2>/dev/null)"; rv=$? + if [ "${rv}" -ne 0 ]; then + zed_log_err "curl exit=${rv}" + return 1 + fi + msg_err="$(echo "${msg_out}" \ + | sed -n -e 's/.*"error" *:.*"message" *: *"\([^"]*\)".*/\1/p')" + if [ -n "${msg_err}" ]; then + zed_log_err "slack webhook \"${msg_err}"\" + return 1 + fi + return 0 +} + # zed_rate_limit (tag, [interval]) # # Check whether an event of a given type [tag] has already occurred within the diff --git a/cmd/zed/zed.d/zed.rc b/cmd/zed/zed.d/zed.rc index 0ef706849..1b220d28d 100644 --- a/cmd/zed/zed.d/zed.rc +++ b/cmd/zed/zed.d/zed.rc @@ -75,6 +75,14 @@ #ZED_PUSHBULLET_CHANNEL_TAG="" ## +# Slack Webhook URL. +# This allows posting to the given channel and includes an access token. +# <https://api.slack.com/incoming-webhooks> +# Disabled by default; uncomment to enable. +# +#ZED_SLACK_WEBHOOK_URL="" + +## # Default directory for zed state files. # #ZED_RUNDIR="/var/run" |