Update postgres by yosifkit · Pull Request #21298 · docker-library/official-images

yosifkit · 2026-04-21T22:17:20Z

Changes:

docker-library/postgres@2353f03: Merge pull request Fix Alpine missing /var/lib/postgresql/data mounts postgres#1409 from infosiftr/mountpoint-fallback
docker-library/postgres@3b6b5fc: Fix Alpine missing /var/lib/postgresql/data mounts

Changes: - docker-library/postgres@2353f03: Merge pull request docker-library/postgres#1409 from infosiftr/mountpoint-fallback - docker-library/postgres@3b6b5fc: Fix Alpine missing `/var/lib/postgresql/data` mounts

github-actions · 2026-04-21T22:18:47Z

Diff for 5b37e1a:

diff --git a/_bashbrew-cat b/_bashbrew-cat
index f4d2818..1d47372 100644
--- a/_bashbrew-cat
+++ b/_bashbrew-cat
@@ -3,100 +3,100 @@ GitRepo: https://github.com/docker-library/postgres.git
 
 Tags: 14.22, 14, 14.22-trixie, 14-trixie
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: a0e0794dce71d160c89c04611663c69399db0d32
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 14/trixie
 
 Tags: 14.22-alpine3.22, 14-alpine3.22
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: a0e0794dce71d160c89c04611663c69399db0d32
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 14/alpine3.22
 
 Tags: 14.22-alpine3.23, 14-alpine3.23, 14.22-alpine, 14-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: a0e0794dce71d160c89c04611663c69399db0d32
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 14/alpine3.23
 
 Tags: 14.22-bookworm, 14-bookworm
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: a0e0794dce71d160c89c04611663c69399db0d32
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 14/bookworm
 
 Tags: 15.17, 15, 15.17-trixie, 15-trixie
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 21d696495924e89b0b6c43088e2783fabdef94be
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 15/trixie
 
 Tags: 15.17-alpine3.22, 15-alpine3.22
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 21d696495924e89b0b6c43088e2783fabdef94be
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 15/alpine3.22
 
 Tags: 15.17-alpine3.23, 15-alpine3.23, 15.17-alpine, 15-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 21d696495924e89b0b6c43088e2783fabdef94be
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 15/alpine3.23
 
 Tags: 15.17-bookworm, 15-bookworm
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 21d696495924e89b0b6c43088e2783fabdef94be
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 15/bookworm
 
 Tags: 16.13, 16, 16.13-trixie, 16-trixie
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 31041e40d9b06ce075f5edd767243e53efb5ee62
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 16/trixie
 
 Tags: 16.13-alpine3.22, 16-alpine3.22
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 31041e40d9b06ce075f5edd767243e53efb5ee62
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 16/alpine3.22
 
 Tags: 16.13-alpine3.23, 16-alpine3.23, 16.13-alpine, 16-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 31041e40d9b06ce075f5edd767243e53efb5ee62
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 16/alpine3.23
 
 Tags: 16.13-bookworm, 16-bookworm
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 31041e40d9b06ce075f5edd767243e53efb5ee62
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 16/bookworm
 
 Tags: 17.9, 17, 17.9-trixie, 17-trixie
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 9451a9a586c4c0efc0fc7c31afbe36d9d650c137
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 17/trixie
 
 Tags: 17.9-alpine3.22, 17-alpine3.22
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 9451a9a586c4c0efc0fc7c31afbe36d9d650c137
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 17/alpine3.22
 
 Tags: 17.9-alpine3.23, 17-alpine3.23, 17.9-alpine, 17-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 9451a9a586c4c0efc0fc7c31afbe36d9d650c137
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 17/alpine3.23
 
 Tags: 17.9-bookworm, 17-bookworm
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 9451a9a586c4c0efc0fc7c31afbe36d9d650c137
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 17/bookworm
 
 Tags: 18.3, 18, latest, 18.3-trixie, 18-trixie, trixie
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 6edb0a8c4def40c371514b34aef9037ec82d9110
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 18/trixie
 
 Tags: 18.3-alpine3.22, 18-alpine3.22, alpine3.22
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 6edb0a8c4def40c371514b34aef9037ec82d9110
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 18/alpine3.22
 
 Tags: 18.3-alpine3.23, 18-alpine3.23, alpine3.23, 18.3-alpine, 18-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 6edb0a8c4def40c371514b34aef9037ec82d9110
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 18/alpine3.23
 
 Tags: 18.3-bookworm, 18-bookworm, bookworm
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 6edb0a8c4def40c371514b34aef9037ec82d9110
+GitCommit: 3b6b5fca9ca40c84b77540fc605ea8e8353b13b2
 Directory: 18/bookworm
diff --git a/postgres_14-alpine/docker-entrypoint.sh b/postgres_14-alpine/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_14-alpine/docker-entrypoint.sh
+++ b/postgres_14-alpine/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_14-alpine3.22/docker-entrypoint.sh b/postgres_14-alpine3.22/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_14-alpine3.22/docker-entrypoint.sh
+++ b/postgres_14-alpine3.22/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_14-bookworm/docker-entrypoint.sh b/postgres_14-bookworm/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_14-bookworm/docker-entrypoint.sh
+++ b/postgres_14-bookworm/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_14-trixie/docker-entrypoint.sh b/postgres_14-trixie/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_14-trixie/docker-entrypoint.sh
+++ b/postgres_14-trixie/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_15-alpine/docker-entrypoint.sh b/postgres_15-alpine/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_15-alpine/docker-entrypoint.sh
+++ b/postgres_15-alpine/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_15-alpine3.22/docker-entrypoint.sh b/postgres_15-alpine3.22/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_15-alpine3.22/docker-entrypoint.sh
+++ b/postgres_15-alpine3.22/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_15-bookworm/docker-entrypoint.sh b/postgres_15-bookworm/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_15-bookworm/docker-entrypoint.sh
+++ b/postgres_15-bookworm/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_15-trixie/docker-entrypoint.sh b/postgres_15-trixie/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_15-trixie/docker-entrypoint.sh
+++ b/postgres_15-trixie/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_16-alpine/docker-entrypoint.sh b/postgres_16-alpine/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_16-alpine/docker-entrypoint.sh
+++ b/postgres_16-alpine/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_16-alpine3.22/docker-entrypoint.sh b/postgres_16-alpine3.22/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_16-alpine3.22/docker-entrypoint.sh
+++ b/postgres_16-alpine3.22/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_16-bookworm/docker-entrypoint.sh b/postgres_16-bookworm/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_16-bookworm/docker-entrypoint.sh
+++ b/postgres_16-bookworm/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_16-trixie/docker-entrypoint.sh b/postgres_16-trixie/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_16-trixie/docker-entrypoint.sh
+++ b/postgres_16-trixie/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_17-alpine/docker-entrypoint.sh b/postgres_17-alpine/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_17-alpine/docker-entrypoint.sh
+++ b/postgres_17-alpine/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_17-alpine3.22/docker-entrypoint.sh b/postgres_17-alpine3.22/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_17-alpine3.22/docker-entrypoint.sh
+++ b/postgres_17-alpine3.22/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_17-bookworm/docker-entrypoint.sh b/postgres_17-bookworm/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_17-bookworm/docker-entrypoint.sh
+++ b/postgres_17-bookworm/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_17-trixie/docker-entrypoint.sh b/postgres_17-trixie/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_17-trixie/docker-entrypoint.sh
+++ b/postgres_17-trixie/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_alpine/docker-entrypoint.sh b/postgres_alpine/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_alpine/docker-entrypoint.sh
+++ b/postgres_alpine/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_alpine3.22/docker-entrypoint.sh b/postgres_alpine3.22/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_alpine3.22/docker-entrypoint.sh
+++ b/postgres_alpine3.22/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_bookworm/docker-entrypoint.sh b/postgres_bookworm/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_bookworm/docker-entrypoint.sh
+++ b/postgres_bookworm/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi
diff --git a/postgres_trixie/docker-entrypoint.sh b/postgres_trixie/docker-entrypoint.sh
index c3432be..d4442d8 100755
--- a/postgres_trixie/docker-entrypoint.sh
+++ b/postgres_trixie/docker-entrypoint.sh
@@ -252,7 +252,12 @@ docker_setup_env() {
 				OLD_DATABASES+=( "$d" )
 			fi
 		done
-		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && mountpoint -q /var/lib/postgresql/data; then
+		if [ "${#OLD_DATABASES[@]}" -eq 0 ] && [ "$PG_MAJOR" -ge 18 ] && {
+			# in BusyBox, "mountpoint" only checks dev vs ino (https://github.com/tianon/mirror-busybox/blob/be7d1b7b1701d225379bc1665487ed0871b592a5/util-linux/mountpoint.c#L78) which will notably miss bind mounts entirely (which almost all Docker volume mounts are)
+			# coreutils checks /proc/self/mountinfo, so we have a fallback to mimic that and directly check "/proc/self/mountinfo" to catch that case
+			mountpoint -q /var/lib/postgresql/data \
+			|| awk '$5 == "/var/lib/postgresql/data" { found = 1 } END { exit !found }' /proc/self/mountinfo
+		}; then
 			OLD_DATABASES+=( '/var/lib/postgresql/data (unused mount/volume)' )
 		fi
 	fi

Relevant Maintainers:

postgres: @tianon @yosifkit

tianon

This BusyBox mountpoint workaround looks correct -- field 5 of /proc/self/mountinfo is indeed the canonical mount point path, so the awk fallback cleanly catches the bind-mount case that BusyBox's dev/ino check misses. The { ... } grouping is a clean way to fold the two-part check into a single && condition without a subshell. The inline comments explaining the why are a nice touch too. 👍

("claude my eyes right out")

Update postgres

5b37e1a

Changes: - docker-library/postgres@2353f03: Merge pull request docker-library/postgres#1409 from infosiftr/mountpoint-fallback - docker-library/postgres@3b6b5fc: Fix Alpine missing `/var/lib/postgresql/data` mounts

yosifkit requested review from a team and LaurentGoderre as code owners April 21, 2026 22:17

github-actions Bot added the library/postgres label Apr 21, 2026

tianon approved these changes Apr 21, 2026

View reviewed changes

tianon merged commit 3a11ba8 into docker-library:master Apr 21, 2026
25 checks passed

tianon deleted the postgres branch April 21, 2026 23:02

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Update postgres#21298

Update postgres#21298
tianon merged 1 commit intodocker-library:masterfrom
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yosifkit commented Apr 21, 2026

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yosifkit commented Apr 21, 2026

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