multi: fix Postgres on Travis

Fixes the docker build that was caused by
https://github.com/docker-library/postgres/issues/884.
Using the alpine and version 13 image avoids the problem introduced
with postgres 14 and debian bullseye.

.travis.yml

@@ -64,7 +64,7 @@ jobs:
     - name: Bitcoind Integration with postgres (txindex enabled)
       script:
         - bash ./scripts/install_bitcoind.sh
-        - make itest-parallel backend=bitcoind dbbackend=postgres
+        - make itest-parallel backend=bitcoind dbbackend=postgres POSTGRES_START_DELAY=10
 
     - name: Bitcoind Integration (txindex disabled)
       script:

Makefile

@@ -194,10 +194,11 @@ ifeq ($(dbbackend),postgres)
 
 	# Start a fresh postgres instance. Allow a maximum of 500 connections.
 	# This is required for the async benchmark to pass.
-	docker run --name lnd-postgres -e POSTGRES_PASSWORD=postgres -p 6432:5432 -d postgres -N 500
+	docker run --name lnd-postgres -e POSTGRES_PASSWORD=postgres -p 6432:5432 -d postgres:13-alpine -N 500
+	docker logs -f lnd-postgres &
 
 	# Wait for the instance to be started.
-	sleep 3
+	sleep $(POSTGRES_START_DELAY)
 endif
 
 itest-only: db-instance

make/testing_flags.mk

@@ -7,6 +7,7 @@ EXEC_SUFFIX =
 COVER_PKG = $$(go list -deps -tags="$(DEV_TAGS)" ./... | grep '$(PKG)' | grep -v lnrpc)
 NUM_ITEST_TRANCHES = 4
 ITEST_PARALLELISM = $(NUM_ITEST_TRANCHES)
+POSTGRES_START_DELAY = 5
 
 # If rpc option is set also add all extra RPC tags to DEV_TAGS
 ifneq ($(with-rpc),)