Remove upstream prometheus cookbook, migrate to our own

site-cookbooks/kosmos_prometheus/recipes/alertmanager.rb

@@ -5,20 +5,89 @@
 
 include_recipe "firewall"
 
-prometheus_alertmanager_install "alertmanager" do
-  version node["prometheus"]["alertmanager"]["version"]
-  checksum node["prometheus"]["alertmanager"]["checksum"]
+version = node["kosmos_prometheus"]["alertmanager"]["version"]
+checksum = node["kosmos_prometheus"]["alertmanager"]["checksum"]
+tarball = "#{Chef::Config[:file_cache_path]}/alertmanager-#{version}.linux-amd64.tar.gz"
+binary_url = "https://github.com/prometheus/alertmanager/releases/download/v#{version}/alertmanager-#{version}.linux-amd64.tar.gz"
+
+group "alertmanager"
+
+user "alertmanager" do
+  gid "alertmanager"
+  system true
+  shell "/bin/false"
+  home "/nonexistent"
 end
 
-prometheus_alertmanager_config "alertmanager"
+directory "/var/lib/alertmanager" do
+  owner "alertmanager"
+  group "alertmanager"
+  mode "0755"
+  recursive true
+end
 
-execute "restart alertmanager config" do
-  command "systemctl restart alertmanager.service"
+directory "/etc/prometheus" do
+  owner "root"
+  group "root"
+  mode "0755"
+  recursive true
+end
+
+package %w(tar bzip2)
+
+remote_file tarball do
+  source binary_url
+  checksum checksum
+  action :create
+  notifies :run, "execute[install_alertmanager]", :immediately
+end
+
+execute "install_alertmanager" do
+  command "tar -xzf #{tarball} -C /usr/local/bin --strip-components=1 alertmanager-#{version}.linux-amd64/alertmanager"
   action :nothing
-  subscribes :run, "template[/opt/prometheus/alertmanager.yml]", :delayed
+  notifies :restart, "service[alertmanager]", :delayed
 end
 
-prometheus_alertmanager_service "alertmanager"
+file "/usr/local/bin/alertmanager" do
+  owner "root"
+  group "root"
+  mode "0755"
+  notifies :restart, "service[alertmanager]", :delayed
+end
+
+template "/etc/prometheus/alertmanager.yml" do
+  source "alertmanager.yml.erb"
+  owner "root"
+  group "alertmanager"
+  mode "0644"
+  notifies :restart, "service[alertmanager]", :delayed
+end
+
+systemd_unit "alertmanager.service" do
+  content({
+    Unit: {
+      Description: "Prometheus Alertmanager",
+      After: "network.target",
+    },
+    Service: {
+      Type: "simple",
+      User: "alertmanager",
+      Group: "alertmanager",
+      ExecStart: "/usr/local/bin/alertmanager --config.file=/etc/prometheus/alertmanager.yml --storage.path=/var/lib/alertmanager --web.listen-address=:9093",
+      Restart: "on-failure",
+      RestartSec: "5",
+    },
+    Install: {
+      WantedBy: "multi-user.target",
+    },
+  })
+  triggers_reload true
+  action :create
+end
+
+service "alertmanager" do
+  action [:enable, :start]
+end
 
 firewall_rule "prometheus alertmanager" do
   port 9093