TD-927: fix canal init

config/sys.config

@@ -4,9 +4,9 @@
             default_db => #{
                 host =>"127.0.0.1",
                 port => 5432,
-                database => "db_name",
-                username => "postgres",
-                password => "postgres"
+                database => "progressor_db",
+                username => "progressor",
+                password => "progressor"
             }
         }},
         {pools, #{
@@ -22,7 +22,7 @@
     ]},
 
     {canal, [
-        {url, "http://vault:8200"},
+        {url, "http://vault"},
         {engine, kvv2}
     ]}
 ].

docker-compose.yml

@@ -0,0 +1,28 @@
+services:
+
+  postgres:
+    image: postgres:15-bookworm
+    environment:
+      POSTGRES_DB: "progressor_db"
+      POSTGRES_USER: "progressor"
+      POSTGRES_PASSWORD: "progressor"
+      PGDATA: "/tmp/postgresql/data/pgdata"
+    volumes:
+      - progressor-data:/tmp/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U progressor -d progressor_db"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+    restart: unless-stopped
+    deploy:
+      resources:
+        limits:
+          cpus: "1"
+          memory: 4G
+
+volumes:
+  progressor-data:

rebar.config

@@ -8,6 +8,6 @@
 ]}.
 
 {shell, [
-  % {config, "config/sys.config"},
+    {config, "config/sys.config"},
     {apps, [epg_connector]}
 ]}.

src/epg_connector.app.src

@@ -6,7 +6,6 @@
   {applications,
    [kernel,
     stdlib,
-    canal,
     epgsql,
     epgsql_pool
    ]},

src/epg_connector_app.erl

@@ -14,6 +14,7 @@
 -export([start/2, stop/1]).
 
 start(_StartType, _StartArgs) ->
+    _ = maybe_start_canal(application:get_all_env(canal)),
     Databases0 = application:get_env(epg_connector, databases, #{}),
     Databases = maybe_set_secrets(Databases0),
     Pools = application:get_env(epg_connector, pools, #{}),
@@ -25,6 +26,11 @@ stop(_State) ->
 
 %% internal functions
 
+maybe_start_canal([]) ->
+    ok;
+maybe_start_canal(_Env) ->
+    _ = application:ensure_all_started(canal).
+
 start_pools(Pools, Databases) ->
     maps:fold(
         fun(PoolName, Opts, _Acc) ->
@@ -61,7 +67,7 @@ vault_client_auth(TokenPath) ->
     case read_maybe_linked_file(TokenPath) of
         {ok, Token} ->
             Role = unicode:characters_to_binary(application:get_env(epg_connector, vault_role, ?VAULT_ROLE)),
-            canal:auth({kubernetes, Role, Token});
+            try_auth(Role, Token);
         Error ->
             Error
     end.
@@ -79,6 +85,14 @@ read_maybe_linked_file(MaybeLinkName) ->
 maybe_expand_relative(BaseFilename, Filename) ->
     filename:absname_join(filename:dirname(BaseFilename), Filename).
 
+try_auth(Role, Token) ->
+    try
+        canal:auth({kubernetes, Role, Token})
+    catch
+        _:_ ->
+            {error, {canal, auth_error}}
+    end.
+
 set_secrets({ok, #{<<"pg_creds">> := #{<<"pg_user">> := PgUser, <<"pg_password">> := PgPassword}}}, Databases) ->
     logger:info("postgres credentials successfuly read from vault (as json)"),
     NewDbConfig = maps:fold(fun(DbName, ConnOpts, Acc) ->
@@ -97,4 +111,3 @@ set_secrets({ok, #{<<"pg_creds">> := PgCreds}}, Databases) ->
 set_secrets(Error, Databases) ->
     logger:error("can`t read postgres credentials from vault with error: ~p", [Error]),
     Databases.
-