diff --git a/cookbooks/gitea/attributes.rb b/cookbooks/gitea/attributes.rb
deleted file mode 100644
index 618852a..0000000
--- a/cookbooks/gitea/attributes.rb
+++ /dev/null
@@ -1,18 +0,0 @@
-# -------------------------------------------
-# Specifying the default settings:
-# -------------------------------------------
-node.reverse_merge!({
-  'gitea' => {
-    'url' => 'https://github.com/go-gitea/gitea/releases/download/',
-    'prefix' => 'gitea-',
-    'postfix' => '-linux-amd64',
-    'storage' => '/opt/gitea/',
-    'location' => '/usr/local/bin/'
-  },
-  'go-mmproxy' => {
-    'url' => 'https://github.com/path-network/go-mmproxy/releases/',
-    'bin_url' => 'https://github.com/path-network/go-mmproxy/releases/download/2.0/go-mmproxy-2.0-centos8-x86_64',
-    'storage' => '/opt/go-mmproxy/',
-    'location' => '/usr/local/bin/'
-  },
-})
diff --git a/cookbooks/gitea/default.rb b/cookbooks/gitea/default.rb
deleted file mode 100644
index 273cc08..0000000
--- a/cookbooks/gitea/default.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-# Loading the attributes:
-include_recipe './attributes.rb'
-
-# Install:
-include_recipe './install-go-mmproxy.rb'
-
-# Setup:
-include_recipe './setup-go-mmproxy.rb'
diff --git a/cookbooks/gitea/files/etc/consul.d/service-go-mmproxy.json b/cookbooks/gitea/files/etc/consul.d/service-go-mmproxy.json
deleted file mode 100644
index f45b065..0000000
--- a/cookbooks/gitea/files/etc/consul.d/service-go-mmproxy.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "service": {
-    "name": "go-mmproxy",
-    "port": 50021,
-    "check":{
-      "tcp": "localhost:50021",
-      "interval": "60s",
-      "timeout": "1s",
-      "success_before_passing": 3
-    }
-  }
-}
diff --git a/cookbooks/gitea/files/etc/systemd/system/go-mmproxy.service b/cookbooks/gitea/files/etc/systemd/system/go-mmproxy.service
deleted file mode 100644
index cc14caf..0000000
--- a/cookbooks/gitea/files/etc/systemd/system/go-mmproxy.service
+++ /dev/null
@@ -1,17 +0,0 @@
-[Unit]
-Description=go-mmproxy
-After=network.target
-
-[Service]
-Type=simple
-LimitNOFILE=65535
-ExecStartPost=/sbin/ip rule add from 127.0.0.1/8 iif lo table 123
-ExecStartPost=/sbin/ip route add local 0.0.0.0/0 dev lo table 123
-ExecStart=/usr/local/bin/go-mmproxy -l 0.0.0.0:50021 -4 127.0.0.1:10022 -v 2
-ExecStopPost=/sbin/ip rule del from 127.0.0.1/8 iif lo table 123
-ExecStopPost=/sbin/ip route del local 0.0.0.0/0 dev lo table 123
-Restart=on-failure
-RestartSec=10s
-
-[Install]
-WantedBy=multi-user.target
diff --git a/cookbooks/gitea/files/etc/systemd/system/promtail-gitea.service b/cookbooks/gitea/files/etc/systemd/system/promtail-gitea.service
deleted file mode 100644
index e1380bd..0000000
--- a/cookbooks/gitea/files/etc/systemd/system/promtail-gitea.service
+++ /dev/null
@@ -1,12 +0,0 @@
-[Unit]
-Description=Grafana Promtail
-Documentation=https://github.com/grafana/loki
-After=network-online.target
-
-[Service]
-User=root
-Restart=always
-ExecStart=/usr/local/bin/promtail --config.file=/etc/promtail/gitea.yaml
-
-[Install]
-WantedBy=multi-user.target
diff --git a/cookbooks/gitea/install-go-mmproxy.rb b/cookbooks/gitea/install-go-mmproxy.rb
deleted file mode 100644
index 5ccf64c..0000000
--- a/cookbooks/gitea/install-go-mmproxy.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-# Download:
-TMP = "/tmp/go-mmproxy"
-
-execute "wget #{node['go-mmproxy']['bin_url']} -O #{TMP}" do
-  not_if "test -e #{node['go-mmproxy']['storage']}/go-mmproxy"
-end
-
-# Install:
-directory node['go-mmproxy']['storage'] do
-  owner 'root'
-  group 'root'
-  mode '755'
-end
-
-execute "mv #{TMP} #{node['go-mmproxy']['storage']}/go-mmproxy" do
-  not_if "test -e #{node['go-mmproxy']['storage']}/go-mmproxy"
-end
-
-# Change Owner and Permissions:
-file "#{node['go-mmproxy']['storage']}/go-mmproxy" do
-  owner 'root'
-  group 'root'
-  mode  '755'
-end
-
-# Create Link
-link "#{node['go-mmproxy']['location']}/go-mmproxy" do
-  to "#{node['go-mmproxy']['storage']}/go-mmproxy"
-end
diff --git a/cookbooks/gitea/setup-go-mmproxy.rb b/cookbooks/gitea/setup-go-mmproxy.rb
deleted file mode 100644
index 2006378..0000000
--- a/cookbooks/gitea/setup-go-mmproxy.rb
+++ /dev/null
@@ -1,43 +0,0 @@
-# Deploy `supervisord` config`:
-remote_file '/etc/systemd/system/go-mmproxy.service' do
-  owner  'root'
-  group  'root'
-  mode   '644'
-
-  notifies :restart, 'service[go-mmproxy]'
-end
-
-service 'go-mmproxy' do
-  action [ :enable, :restart ]
-end
-
-# Depoy `consul` service configuration for `gitea`:
-remote_file '/etc/consul.d/service-go-mmproxy.json' do
-  owner  'consul'
-  group  'consul'
-  mode   '644'
-
-  notifies :reload, 'service[consul]'
-end
-
-service 'consul' do
-  action :nothing
-end
-
-# Firewall settings here:
-%w( 50021/tcp ).each do |p|
-  execute "ufw allow #{p}" do
-    user 'root'
-
-    not_if "LANG=c ufw status | grep #{p}"
-
-    notifies :run, 'execute[ufw reload-or-enable]'
-  end
-end
-
-execute 'ufw reload-or-enable' do
-  user 'root'
-  command 'LANG=C ufw reload | grep skipping && ufw --force enable || exit 0'
-
-  action :nothing
-end
diff --git a/cookbooks/gitea/templates/etc/promtail/gitea.yaml b/cookbooks/gitea/templates/etc/promtail/gitea.yaml
deleted file mode 100644
index 48d7dd0..0000000
--- a/cookbooks/gitea/templates/etc/promtail/gitea.yaml
+++ /dev/null
@@ -1,61 +0,0 @@
-server:
-  disable: true
-
-positions:
-  filename: /var/opt/promtail/promtail_gitea_position.yaml
-
-clients:
-  - url: http://<%= @LOKIENDPOINT %>/loki/api/v1/push
-
-scrape_configs:
-  - job_name: gitea
-    static_configs:
-    - targets:
-        - localhost
-      labels:
-        job: gitea
-        hostname: <%= @HOSTNAME %>
-        vhost: gitea.kazu634.com
-        __path__: /var/log/supervisor/gitea.log
-
-    pipeline_stages:
-    - match:
-        selector: '{job="gitea"}'
-
-        stages:
-        - drop:
-            expression: "(Static|robots.txt|sitemap.xml)"
-
-        - regex:
-            expression: '^\[Macaron\] (?P<timestamp>[0-9]+\-[0-9]+\-[0-9]+ +[0-9]+:[0-9]+:[0-9]+): (?P<message1>[^\/]+) (?P<uri>\/[^ ]*) (?P<response>[^ ]+) (?P<message2>.+)$'
-
-        - timestamp:
-            source: timestamp
-            format: 2006-01-02 15:04:05
-            location: Asia/Tokyo
-
-        - template:
-            source: message
-            template: '{{ .message1 }} {{ .uri }} ({{ .message2 }})'
-
-        - template:
-            source: level
-            template: '{{ .response }}'
-
-        - template:
-            source: level
-            template: '{{ regexReplaceAllLiteral "(2[0-9]+|3[0-9]+|for)" .Value "info" }}'
-
-        - template:
-            source: level
-            template: '{{ regexReplaceAllLiteral "4[0-9]+" .Value "warning" }}'
-
-        - template:
-            source: level
-            template: '{{ regexReplaceAllLiteral "5[0-9]+" .Value "error" }}'
-
-        - labels:
-            level:
-
-        - output:
-            source: message
diff --git a/cookbooks/prometheus/files/etc/prometheus.d/alerts/services.yml b/cookbooks/prometheus/files/etc/prometheus.d/alerts/services.yml
index 20488a6..b929b7c 100644
--- a/cookbooks/prometheus/files/etc/prometheus.d/alerts/services.yml
+++ b/cookbooks/prometheus/files/etc/prometheus.d/alerts/services.yml
@@ -10,3 +10,12 @@ groups:
       summary: "Digdag is not running: {{ $labels.instance }}."
       description: "Digdag is not running: {{ $labels.instance }}."
 
+  - alert: go-mmproxy
+    expr: node_systemd_unit_state{name="go-mmproxy:w.service", state="active"} != 1
+    for: 5m
+    labels:
+      severity: error
+    annotations:
+      summary: "Digdag is not running: {{ $labels.instance }}."
+      description: "Digdag is not running: {{ $labels.instance }}."
+