apport information ** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/1902358/+attachment/5429758/+files/Dependencies.txt
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1902358 Title: Kubernetes service connectivity issue Ubuntu 20.04 + fq queue discipline Status in systemd package in Ubuntu: Incomplete Bug description: IMO this is not related to Kubernetes so I filed the bug here. **What happened**: Processes in container can't connect to `kubernetes.default` service. **What you expected to happen**: It should be able to connect. **How to reproduce it (as minimally and precisely as possible)**: ```bash host# tc qdisc add dev eth0 root fq host# nsenter -n -t $(pidof some-process-in-container) container-net-ns# nc -vv 10.97.0.1 443 # Could not connect ``` **Anything else we need to know?**: ```bash host# tc qdisc add dev eth0 root noqueue # this works host# tc qdisc add dev eth0 root fq_codel # this works too ``` - `host` is where the workload container is, not Kubernetes master. - When the bug condition is met, packets won't be sent on wire. - kube-proxy works in IPVS mode. - The reason to tinker with qdisc is to enable TCP BBR, which requires fq qdisc. - fq qdisc works in `Linux node1 4.15.0-106-generic #107-Ubuntu SMP Thu Jun 4 11:27:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux (Ubuntu 18.04)` **Environment**: - Cloud provider or hardware configuration: `NIC: Intel X520-DA1 (82599)` - OS (e.g: `cat /etc/os-release`): `Ubuntu 20.04.1 LTS \n \l` - Kernel (e.g. `uname -a`): `Linux Proton 5.4.0-52-generic #57-Ubuntu SMP Thu Oct 15 10:57:00 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux` - Install tools: - Network plugin and version (if this is a network-related bug): `Calico v3.14.1 with IPIP & NAT-Outgoing` - Others: --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.10 Architecture: amd64 CasperMD5CheckResult: pass DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-10-31 (0 days ago) InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: Dell Inc. PowerEdge R730 NonfreeKernelModules: nvidia_modeset nvidia Package: systemd 245.4-4ubuntu3.2 PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-52-generic root=UUID=14d488b4-d8f0-4b48-8793-780af41edd93 ro ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65 Tags: focal uec-images Uname: Linux 5.4.0-52-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True dmi.bios.date: 01/17/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.4.3 dmi.board.name: 0WCJNT dmi.board.vendor: Dell Inc. dmi.board.version: A07 dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.4.3:bd01/17/2017:svnDellInc.:pnPowerEdgeR730:pvr:rvnDellInc.:rn0WCJNT:rvrA07:cvnDellInc.:ct23:cvr: dmi.product.name: PowerEdge R730 dmi.product.sku: SKU=NotProvided;ModelName=PowerEdge R730 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1902358/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
