metrics: upgrade to 0.3.0 version

Author: vasiliy-t

example/project/app/roles/custom.lua

@@ -1,15 +1,11 @@
 local cartridge = require('cartridge')
-local metrics = require("metrics")
-local json_metrics = require("metrics.plugins.json")
-local prometheus = require("metrics.plugins.prometheus")
-local http_middleware = metrics.http_middleware
-
-metrics.set_global_labels({ alias = 'instance'})
-metrics.enable_default_metrics()
 
 local function init(opts) -- luacheck: no unused args
     -- if opts.is_master then
     -- end
+    local metrics = cartridge.service_get('metrics')
+    local http_middleware = metrics.http_middleware
+
     local http_collector = http_middleware.build_default_collector('average')
 
     local httpd = cartridge.service_get('httpd')
@@ -23,24 +19,6 @@ local function init(opts) -- luacheck: no unused args
         )
     )
 
-    httpd:route(
-        { method = 'GET', path = '/metrics' },
-        http_middleware.v1(
-            function(req)
-                return req:render({ text = json_metrics.export() })
-            end,
-            http_collector
-        )
-    )
-
-    httpd:route(
-        { path = '/metrics/prometheus' },
-        http_middleware.v1(
-            prometheus.collect_http,
-            http_collector
-        )
-    )
-
     return true
 end
 
@@ -64,5 +42,4 @@ return {
     stop = stop,
     validate_config = validate_config,
     apply_config = apply_config,
-    -- dependencies = {'cartridge.roles.vshard-router'},
 }

example/project/init.lua

@@ -27,15 +27,15 @@ else
 end
 
 local cartridge = require('cartridge')
-local cartridge_admin = require('cartridge.admin')
 local membership = require('membership')
 local log = require("log")
 local ok, err = cartridge.cfg({
     workdir = 'tmp/db',
     roles = {
         'cartridge.roles.vshard-storage',
         'cartridge.roles.vshard-router',
-        'app.roles.custom',
+        'cartridge.roles.metrics',
+        'app.roles.custom'
     },
     cluster_cookie = 'project-cluster-cookie',
 })
@@ -45,6 +45,7 @@ assert(ok, tostring(err))
 local all = {
     'vshard-storage',
     'vshard-router',
+    'metrics',
     'app.roles.custom'
 }
 
@@ -56,10 +57,27 @@ local _, err = cartridge.admin_join_server({
 if err ~= nil then
     log.warn('%s', tostring(err))
 else
-    local _, err = cartridge_admin.bootstrap_vshard()
+    local _, err = cartridge.admin_bootstrap_vshard()
     if err ~= nil then
         log.error('%s', tostring(err))
         os.exit(1)
     end
+
+    -- This code is only for example purposes
+    -- DO NOT USE IT IN PROD CLUSTERS WITH MORE THAN 1 INSTANCE!
+    cartridge.config_patch_clusterwide({
+        metrics = {
+            export = {
+                {
+                    path = '/metrics',
+                    format = 'json'
+                },
+                {
+                    path = '/metrics/prometheus',
+                    format = 'prometheus'
+                }
+            }
+        }
+    })
 end
 

example/project/project-scm-1.rockspec

@@ -10,7 +10,7 @@ dependencies = {
     'checks == 3.0.1-1',
     'http == 1.1.0-1',
     'cartridge == 2.1.2-1',
-    'metrics == 0.2.0'
+    'metrics ~> 0.3'
 }
 build = {
     type = 'none';