adding node exporter, loki, and promtail

addon-promtail-main/rootfs/etc/cont-init.d/promtail_setup.sh

@@ -0,0 +1,129 @@
+#!/usr/bin/with-contenv bashio
+# shellcheck shell=bash
+# ==============================================================================
+# Home Assistant Add-on: Promtail
+# This file makes the config file from inputs
+# ==============================================================================
+readonly CONFIG_DIR=/etc/promtail
+readonly CONFIG_FILE="${CONFIG_DIR}/config.yaml"
+readonly BASE_CONFIG="${CONFIG_DIR}/base_config.yaml"
+readonly DEF_SCRAPE_CONFIGS="${CONFIG_DIR}/default-scrape-config.yaml"
+readonly CUSTOM_SCRAPE_CONFIGS="${CONFIG_DIR}/custom-scrape-config.yaml"
+declare cafile
+declare add_stages
+declare add_scrape_configs
+scrape_configs="${DEF_SCRAPE_CONFIGS}"
+
+bashio::log.info 'Setting base config for promtail...'
+cp "${BASE_CONFIG}" "${CONFIG_FILE}"
+
+# Set up client section
+if ! bashio::config.is_empty 'client.username'; then
+    bashio::log.info 'Adding basic auth to client config...'
+    bashio::config.require 'client.password' "'client.username' is specified"
+    {
+        echo "    basic_auth:"
+        echo "      username: $(bashio::config 'client.username')"
+        echo "      password: $(bashio::config 'client.password')"
+    } >> "${CONFIG_FILE}"
+fi
+
+if ! bashio::config.is_empty 'client.cafile'; then
+    bashio::log.info "Adding TLS to client config..."
+    cafile="/ssl/$(bashio::config 'client.cafile')"
+
+    if ! bashio::fs.file_exists "${cafile}"; then
+        bashio::log.fatal
+        bashio::log.fatal "The file specified for 'cafile' does not exist!"
+        bashio::log.fatal "Ensure the CA certificate file exists and full path is provided"
+        bashio::log.fatal
+        bashio::exit.nok
+    fi
+    {
+        echo "    tls_config:"
+        echo "      ca_file: ${cafile}"
+    } >> "${CONFIG_FILE}"
+
+    if ! bashio::config.is_empty 'client.servername'; then
+        echo "      server_name: $(bashio::config 'client.servername')" >> "${CONFIG_FILE}"
+    fi
+
+    if ! bashio::config.is_empty 'client.certfile'; then
+        bashio::log.info "Adding mTLS to client config..."
+        bashio::config.require 'client.keyfile' "'client.certfile' is specified"
+        if ! bashio::fs.file_exists "$(bashio::config 'client.certfile')"; then
+            bashio::log.fatal
+            bashio::log.fatal "The file specified for 'certfile' does not exist!"
+            bashio::log.fatal "Ensure the certificate file exists and full path is provided"
+            bashio::log.fatal
+            bashio::exit.nok
+        fi
+        if ! bashio::fs.file_exists "$(bashio::config 'client.keyfile')"; then
+            bashio::log.fatal
+            bashio::log.fatal "The file specified for 'keyfile' does not exist!"
+            bashio::log.fatal "Ensure the key file exists and full path is provided"
+            bashio::log.fatal
+            bashio::exit.nok
+        fi
+        {
+            echo "      cert_file: $(bashio::config 'client.certfile')"
+            echo "      key_file: $(bashio::config 'client.keyfile')"
+        } >> "${CONFIG_FILE}"
+    fi
+fi
+
+# Add in scrape configs
+{
+    echo
+    echo "scrape_configs:"
+} >> "${CONFIG_FILE}"
+if bashio::config.true 'skip_default_scrape_config'; then
+    bashio::log.info 'Skipping default journald scrape config...'
+    if ! bashio::config.is_empty 'additional_pipeline_stages'; then
+        bashio::log.warning
+        bashio::log.warning "'additional_pipeline_stages' ignored since 'skip_default_scrape_config' is true!"
+        bashio::log.warning 'See documentation for more information.'
+        bashio::log.warning
+    fi
+    bashio::config.require 'additional_scrape_configs' "'skip_default_scrape_config' is true"
+
+elif ! bashio::config.is_empty 'additional_pipeline_stages'; then
+    bashio::log.info "Adding additional pipeline stages to default journal scrape config..."
+    add_stages="$(bashio::config 'additional_pipeline_stages')"
+    scrape_configs="${CUSTOM_SCRAPE_CONFIGS}"
+    if ! bashio::fs.file_exists "${add_stages}"; then
+        bashio::log.fatal
+        bashio::log.fatal "The file specified for 'additional_pipeline_stages' does not exist!"
+        bashio::log.fatal "Ensure the file exists at the path specified"
+        bashio::log.fatal
+        bashio::exit.nok
+    fi
+
+    yq -NP eval-all \
+        'select(fi == 0) + [{"add_pipeline_stages": select(fi == 1)}]' \
+        "${DEF_SCRAPE_CONFIGS}" "${add_stages}" \
+    | yq -NP e \
+        '[(.[0] * .[1]) | {"job_name": .job_name, "journal": .journal, "relabel_configs": .relabel_configs, "pipeline_stages": .pipeline_stages + .add_pipeline_stages}]' \
+        - > "${scrape_configs}"
+fi
+
+if ! bashio::config.is_empty 'additional_scrape_configs'; then
+    bashio::log.info "Adding custom scrape configs..."
+    add_scrape_configs="$(bashio::config 'additional_scrape_configs')"
+    if ! bashio::fs.file_exists "${add_scrape_configs}"; then
+        bashio::log.fatal
+        bashio::log.fatal "The file specified for 'additional_scrape_configs' does not exist!"
+        bashio::log.fatal "Ensure the file exists at the path specified"
+        bashio::log.fatal
+        bashio::exit.nok
+    fi
+
+    if bashio::config.true 'skip_default_scrape_config'; then
+        yq -NP e '[] + .' "${add_scrape_configs}" >> "${CONFIG_FILE}"
+    else
+        yq -NP eval-all 'select(fi == 0) + select(fi == 1)' \
+            "${scrape_configs}" "${add_scrape_configs}" >> "${CONFIG_FILE}"
+    fi
+else
+    yq -NP e '[] + .' "${scrape_configs}" >> "${CONFIG_FILE}"
+fi

addon-promtail-main/rootfs/etc/promtail/base_config.yaml

@@ -0,0 +1,11 @@
+---
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+  log_level: "${LOG_LEVEL}"
+
+positions:
+  filename: /data/promtail/positions.yaml
+
+clients:
+  - url: "${URL}"

addon-promtail-main/rootfs/etc/promtail/default-scrape-config.yaml

@@ -0,0 +1,27 @@
+---
+- job_name: journal
+  journal:
+    json: false
+    max_age: 12h
+    labels:
+      job: systemd-journal
+    path: "${JOURNAL_PATH}"
+  relabel_configs:
+    - source_labels:
+        - __journal__systemd_unit
+      target_label: unit
+    - source_labels:
+        - __journal__hostname
+      target_label: nodename
+    - source_labels:
+        - __journal_syslog_identifier
+      target_label: syslog_identifier
+    - source_labels:
+        - __journal_container_name
+      target_label: container_name
+  pipeline_stages:
+    - match:
+        selector: '{container_name=~"homeassistant|hassio_supervisor"}'
+        stages:
+          - multiline:
+              firstline: '^\x{001b}'

addon-promtail-main/rootfs/etc/services.d/promtail/finish

@@ -0,0 +1,15 @@
+#!/usr/bin/env bashio
+# ==============================================================================
+# Take down the S6 supervision tree when Promtail fails
+# s6-overlay docs: https://github.com/just-containers/s6-overlay
+# ==============================================================================
+
+declare APP_EXIT_CODE=${1}
+
+if [[ "${APP_EXIT_CODE}" -ne 0 ]] && [[ "${APP_EXIT_CODE}" -ne 256 ]]; then
+  bashio::log.warning "Halt add-on with exit code ${APP_EXIT_CODE}"
+  echo "${APP_EXIT_CODE}" > /run/s6-linux-init-container-results/exitcode
+  exec /run/s6/basedir/bin/halt
+fi
+
+bashio::log.info "Service restart after closing"

addon-promtail-main/rootfs/etc/services.d/promtail/run

@@ -0,0 +1,40 @@
+#!/usr/bin/with-contenv bashio
+# shellcheck shell=bash
+# ==============================================================================
+# Home Assistant Add-on: Promtail
+# Runs Promtail
+# ==============================================================================
+readonly PROMTAIL_CONFIG='/etc/promtail/config.yaml'
+declare log_level
+
+bashio::log.info 'Starting Promtail...'
+
+journal_path='/var/log/journal'
+if ! bashio::fs.directory_exists "${journal_path}" || [ -z "$(ls -A ${journal_path})" ]; then
+    bashio::log.info "No journal at ${journal_path}, looking for journal in /run/log/journal instead"
+    journal_path='/run/log/journal'
+fi
+
+case "$(bashio::config 'log_level')" in \
+    trace)      ;& \
+    debug)      log_level='debug' ;; \
+    notice)     ;& \
+    warning)    log_level='warn' ;; \
+    error)      ;& \
+    fatal)      log_level='error' ;; \
+    *)          log_level='info' ;; \
+esac;
+bashio::log.info "Promtail log level set to ${log_level}"
+
+export "URL=$(bashio::config 'client.url')"
+export "JOURNAL_PATH=${journal_path}"
+export "LOG_LEVEL=${log_level}"
+
+promtail_args=("-config.expand-env=true" "-config.file=${PROMTAIL_CONFIG}")
+if [ "${log_level}" == "debug" ]; then
+    bashio::log.debug "Logging full config on startup for debugging..."
+    promtail_args+=("-print-config-stderr=true")
+fi
+
+bashio::log.info "Handing over control to Promtail..."
+/usr/bin/promtail "${promtail_args[@]}"