Unable to mount root filesystem: invalid mount config

[rogercoll]

Bug Report

$ cat .git/config | rg url
        url = git@github.com:open-telemetry/opentelemetry-demo.git
$ make start
docker compose --env-file .env --env-file .env.override up --force-recreate --remove-orphans --detach
[+] Running 7/8
 ✔ Container flagd        Recreated                                                      0.1s
 ✔ Container kafka        Recreated                                                      0.1s
 ✔ Container jaeger       Recreated                                                      0.1s
 ✔ Container prometheus   Recreated                                                      0.1s
 ✔ Container grafana      Recreated                                                      0.1s
 ✔ Container opensearch   Recreated                                                      0.1s
 ✔ Container valkey-cart  Recreated                                                      0.1s
 ⠋ Container otel-col     Creating                                                       0.0s
Error response from daemon: invalid mount config: must use either propagation mode "rslave" or "rshared" when mount source is within the daemon root, daemon root: "/var/lib/docker", bind mount source: "/", propagation: "rprivate"
make: *** [Makefile:130: start] Error 1

Symptom

After docker being upgraded, current version: 27.2.1

What do you expect to see? No error mounting the root filesystem in the opentelemetry collector

[rogercoll]

It seems that this change fixes the issue:

diff --git a/docker-compose.yml b/docker-compose.yml
index e253cdc..9696857 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -695,7 +695,7 @@ services:
     command: [ "--config=/etc/otelcol-config.yml", "--config=/etc/otelcol-config-extras.yml" ]
     user: 0:0
     volumes:
-      - ${HOST_FILESYSTEM}:/hostfs:ro
+      - ${HOST_FILESYSTEM}:/hostfs:ro,rslave

Has anyone experienced the same failure?

[julianocosta89]

I'm not getting this error, but adding rslave didn't crash, so I'd suggest adding it to the upstream compose and compose.minimal.

[julianocosta89]

@rogercoll I have an opened PR that changes the otel-col, you could add the rslave there if you would like.
#1724

[rogercoll]

Thanks for the check @julianocosta89 ! I have just opened a new PR so we have more scoped PRs #1728