Commit Graph

13 Commits

Author SHA1 Message Date
Dalton Hubble 4ea1fde9c5 Update Kubernetes from v1.10.2 to v1.10.3
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.10.md#v1103
* Update Calico from v3.1.1 to v3.1.2
2018-05-21 21:38:43 -07:00
Dalton Hubble 37981f9fb1 Allow bearer token authn/authz to the Kubelet
* Require Webhook authorization to the Kubelet
* Switch apiserver X509 client cert org to systems:masters
to grant the apiserver admin and satisfy the authorization
requirement. kubectl commands like logs or exec that have
the apiserver make requests of a kubelet continue to work
as before
* https://kubernetes.io/docs/admin/kubelet-authentication-authorization/
* https://github.com/poseidon/typhoon/issues/215
2018-05-13 23:20:42 -07:00
Dalton Hubble 32ddfa94e1 Update Kubernetes from v1.10.1 to v1.10.2
* https://github.com/kubernetes/kubernetes/releases/tag/v1.10.2
2018-04-28 00:27:00 -07:00
Dalton Hubble 567e18f015 Fix conflict between Calico and NetworkManager
* Observed frequent kube-scheduler and controller-manager
restarts with Calico as the CNI provider. Root cause was
unclear since control plane was functional and tests of
pod to pod network connectivity passed
* Root cause: Calico sets up cali* and tunl* network interfaces
for containers on hosts. NetworkManager tries to manage these
interfaces. It periodically disconnected veth pairs. Logs did
not surface this issue since its not an error per-se, just Calico
and NetworkManager dueling for control. Kubernetes correctly
restarted pods failing health checks and ensured 2 replicas were
running so the control plane functioned mostly normally. Pod to
pod connecitivity was only affected occassionally. Pain to debug.
* Solution: Configure NetworkManager to ignore the Calico ifaces
per Calico's recommendation. Cloud-init writes files after
NetworkManager starts, so a restart is required on first boot. On
subsequent boots, the file is present so no restart is needed
2018-04-25 21:45:58 -07:00
Dalton Hubble 0a7fab56e2 Load ip_vs kernel module on boot as workaround
* (containerized) kube-proxy warns that it is unable to
load the ip_vs kernel module despite having the correct
mounts. Atomic uses an xz compressed module and modprobe
in the container was not compiled with compression support
* Workaround issue for now by always loading ip_vs on-host
* https://github.com/kubernetes/kubernetes/issues/60
2018-04-25 21:45:58 -07:00
Dalton Hubble d784b0fca6 Switch to quay.io/poseidon tagged system containers 2018-04-25 18:15:18 -07:00
Dalton Hubble 3dde4ba8ba Mount host's /etc/os-release in kubelet system containers
* Fix `kubectl describe node` to reflect the host's operating
system
2018-04-21 18:46:56 -07:00
Dalton Hubble e148552220 Enable kubelet allocatable enforcement and QoS cgroup hierarchy
* Change kubelet system image to use --cgroups-per-qos=true
(default) instead of false
* Change kubelet system image to use --enforce-node-allocatable=pods
instead of an empty string
2018-04-21 18:46:56 -07:00
Dalton Hubble d8d1468f03 Update kubelet system container image to mount /etc/hosts
* Fix kubelet port-forward on Google Cloud / Fedora Atomic
* Mount the host's /etc/hosts in kubelet system containers
* Problem: kubelet runc system containers on Atomic were not
mounting the host's /etc/hosts, like rkt-fly does on Container
Linux. `kubectl port-forward` calls socat with localhost. DNS
servers on AWS, DO, and in many bare-metal environments resolve
localhost to the caller as a convenience. Google Cloud notably
does not nor is it required to do so and this surfaced the
missing /etc/hosts in runc kubelet namespaces.
2018-04-21 18:46:56 -07:00
Dalton Hubble b3cf9508b6 Update Fedora Atomic modules to Kubernetes v1.10.1 2018-04-21 18:46:56 -07:00
Dalton Hubble 8523a086e2 Fix kubelet system container to mount CNI plugins
* Mount /opt/cni/bin in kubelet system container so
CNI plugin binaries can be found. Before, flannel
worked because the kubelet falls back to flannel
plugin baked into the hyperkube (undesired)
* Move the CNI bin install location later, since /opt
changes may be lost between ostree rebases
2018-04-21 18:46:56 -07:00
Dalton Hubble 19bc5aea9e Use kubelet system container on fedora-atomic
* Use the upstream hyperkube image packaged with the
required metadata to be usable as a system container
under systemd
* Fix port-forward since socat is included
2018-04-21 18:46:56 -07:00
Dalton Hubble ddc75e99ac Add bare-metal Fedora Atomic module
* Several known hacks and broken areas
* Download v1.10 Kubelet from release tarball
* Install flannel CNI binaries to /opt/cni
* Switch SELinux to Permissive
* Disable firewalld service
* port-forward won't work, socat missing
2018-04-21 18:46:56 -07:00