network dis-/connect: update /etc/hosts

When we connect or disconnect from a network we also have to update
/etc/hosts to ensure we only have valid entries in there.
This also fixes problems with docker-compose since this makes use of
network connect/disconnect.

Fixes #12533

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/test/system/500-networking.bats b/test/system/500-networking.bats
index f57c3dbd7..274af7ec5 100644
--- a/test/system/500-networking.bats
+++ b/test/system/500-networking.bats
@@ -469,9 +469,17 @@ load helpers
     run_podman inspect $cid --format "{{(index .NetworkSettings.Networks \"$netname\").Aliases}}"
     is "$output" "[${cid:0:12}]" "short container id in network aliases"
 
+    # check /etc/hosts for our entry
+    run_podman exec $cid cat /etc/hosts
+    is "$output" ".*$ip.*" "hosts contain expected ip"
+
     run_podman network disconnect $netname $cid
     is "$output" "" "Output should be empty (no errors)"
 
+    # check /etc/hosts again, the entry should be gone now
+    run_podman exec $cid cat /etc/hosts
+    assert "$output" !~ "$ip" "IP ($ip) should no longer be in /etc/hosts"
+
     # check that we cannot curl (timeout after 3 sec)
     run curl --max-time 3 -s $SERVER/index.txt
     assert $status -ne 0 \
@@ -487,13 +495,18 @@ load helpers
     # check that we have a new ip and mac
     # if the ip is still the same this whole test turns into a nop
     run_podman inspect $cid --format "{{(index .NetworkSettings.Networks \"$netname\").IPAddress}}"
-    assert "$output" != "$ip" \
+    new_ip="$output"
+    assert "$new_ip" != "$ip" \
            "IP address did not change after podman network disconnect/connect"
 
     run_podman inspect $cid --format "{{(index .NetworkSettings.Networks \"$netname\").MacAddress}}"
     assert "$output" != "$mac" \
            "MAC address did not change after podman network disconnect/connect"
 
+    # check /etc/hosts for the new entry
+    run_podman exec $cid cat /etc/hosts
+    is "$output" ".*$new_ip.*" "hosts contain expected new ip"
+
     # Disconnect/reconnect of a container *with no ports* should succeed quietly
     run_podman network disconnect $netname $background_cid
     is "$output" "" "disconnect of container with no open ports"