test: clean up E2E test volumes using a container (#5509)

test/e2e/runner/cleanup.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"path/filepath"
 
 	e2e "github.com/tendermint/tendermint/test/e2e/pkg"
 )
@@ -21,6 +22,24 @@ func Cleanup(testnet *e2e.Testnet) error {
 	}
 
 	logger.Info("Removing Docker containers and networks")
+	err = execCompose(testnet.Dir, "stop")
+	if err != nil {
+		return err
+	}
+
+	// On Linux, some local files in the volume will be owned by root since Tendermint
+	// runs as root inside the container, so we need to clean them up from within a
+	// container running as root too.
+	absDir, err := filepath.Abs(testnet.Dir)
+	if err != nil {
+		return err
+	}
+	err = execDocker("run", "--entrypoint", "", "-v", fmt.Sprintf("%v:/network", absDir),
+		"tendermint/e2e-node", "sh", "-c", "rm -rf /network/*/")
+	if err != nil {
+		return err
+	}
+
 	err = execCompose(testnet.Dir, "down")
 	if err != nil {
 		return err