Commit Graph

300 Commits

Author SHA1 Message Date
Dalton Hubble e4d977bfcd Fix worker_node_labels for initial Fedora CoreOS
* Add Terraform strip markers to consume beginning and
trailing whitespace in templated Kubelet arguments for
podman (Fedora CoreOS only)
* Fix initial `worker_node_labels` being quietly ignored
on Fedora CoreOS cloud platforms that offer the feature
* Close https://github.com/poseidon/typhoon/issues/650
2020-02-22 15:12:35 -08:00
Dalton Hubble 4a38fb5927 Update CoreDNS from v1.6.6 to v1.6.7
* https://coredns.io/2020/01/28/coredns-1.6.7-release/
2020-02-18 21:46:19 -08:00
Suraj Deshmukh c4e64a9d1b
Change Kubelet /var/lib/calico mount to read-only (#643)
* Kubelet only requires read access to /var/lib/calico

Signed-off-by: Suraj Deshmukh <surajd.service@gmail.com>
2020-02-18 21:40:58 -08:00
Dalton Hubble 49d3b9e6b3 Set docker log driver to json-file on Fedora CoreOS
* Fix the last minor issue for Fedora CoreOS clusters to pass CNCF's
Kubernetes conformance tests
* Kubelet supports a seldom used feature `kubectl logs --limit-bytes=N`
to trim a log stream to a desired length. Kubelet handles this in the
CRI driver. The Kubelet docker shim only supports the limit bytes
feature when Docker is configured with the default `json-file` logging
driver
* CNCF conformance tests started requiring limit-bytes be supported,
indirectly forcing the log driver choice until either the Kubelet or
the conformance tests are fixed
* Fedora CoreOS defaults Docker to use `journald` (desired). For now,
as a workaround to offer conformant clusters, the log driver can
be set back to `json-file`. RHEL CoreOS likely won't have noticed the
non-conformance since its using crio runtime
* https://github.com/kubernetes/kubernetes/issues/86367

Note: When upstream has a fix, the aim is to drop the docker config
override and use the journald default
2020-02-11 23:00:38 -08:00
Dalton Hubble 1243f395d1 Update Kubernetes from v1.17.2 to v1.17.3
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.17.md#v1173
2020-02-11 20:22:14 -08:00
Dalton Hubble ca96a1335c Update Calico from v3.11.2 to v3.12.0
* https://docs.projectcalico.org/release-notes/#v3120
* Remove reverse packet filter override, since Calico no
longer relies on the setting
* https://github.com/coreos/fedora-coreos-tracker/issues/219
* https://github.com/projectcalico/felix/pull/2189
2020-02-06 00:43:33 -08:00
Dalton Hubble 8cc303c9ac Add module for Fedora CoreOS on Google Cloud
* Add Typhoon Fedora CoreOS on Google Cloud as alpha
* Add docs on uploading the Fedora CoreOS GCP gzipped tarball to
Google Cloud storage to create a boot disk image
2020-02-01 15:21:40 -08:00
Dalton Hubble 1cda5bcd2a Update Kubernetes from v1.17.1 to v1.17.2
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.17.md#v1172
2020-01-21 18:27:39 -08:00
Dalton Hubble 7daabd28b5 Update Calico from v3.11.1 to v3.11.2
* https://docs.projectcalico.org/v3.11/release-notes/
2020-01-18 13:45:24 -08:00
Dalton Hubble b642e3b41b Update Kubernetes from v1.17.0 to v1.17.1
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.17.md#v1171
2020-01-14 20:21:36 -08:00
Dalton Hubble b1f521fc4a Allow terraform-provider-google v3.x plugin versions
* Typhoon Google Cloud is compatible with `terraform-provider-google`
v3.x releases
* No v3.x specific features are used, so v2.19+ provider versions are
still allowed, to ease migrations
2020-01-11 14:07:18 -08:00
Dalton Hubble 43e05b9131 Enable kube-proxy metrics and allow Prometheus scrapes
* Configure kube-proxy --metrics-bind-address=0.0.0.0 (default
127.0.0.1) to serve metrics on 0.0.0.0:10249
* Add firewall rules to allow Prometheus (resides on a worker) to
scrape kube-proxy service endpoints on controllers or workers
* Add a clusterIP: None service for kube-proxy endpoint discovery
2020-01-06 21:11:18 -08:00
Dalton Hubble b2eb3e05d0 Disable Kubelet 127.0.0.1.10248 healthz endpoint
* Kubelet runs a healthz server listening on 127.0.0.1:10248
by default. Its unused by Typhoon and can be disabled
* https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/
2019-12-29 11:23:25 -08:00
Dalton Hubble f1f4cd6fc0 Inline Container Linux kubelet.service, deprecate kubelet-wrapper
* Change kubelet.service on Container Linux nodes to ExecStart Kubelet
inline to replace the use of the host OS kubelet-wrapper script
* Express rkt run flags and volume mounts in a clear, uniform way to
make the Kubelet service easier to audit, manage, and understand
* Eliminate reliance on a Container Linux kubelet-wrapper script
* Typhoon for Fedora CoreOS developed a kubelet.service that similarly
uses an inline ExecStart (except with podman instead of rkt) and a
more minimal set of volume mounts. Adopt the volume improvements:
  * Change Kubelet /etc/kubernetes volume to read-only
  * Change Kubelet /etc/resolv.conf volume to read-only
  * Remove unneeded /var/lib/cni volume mount

Background:

* kubelet-wrapper was added in CoreOS around the time of Kubernetes v1.0
to simplify running a CoreOS-built hyperkube ACI image via rkt-fly. The
script defaults are no longer ideal (e.g. rkt's notion of trust dates
back to quay.io ACI image serving and signing, which informed the OCI
standard images we use today, though they still lack rkt's signing ideas).
* Shipping kubelet-wrapper was regretted at CoreOS, but remains in the
distro for compatibility. The script is not updated to track hyperkube
changes, but it is stable and kubelet.env overrides bridge most gaps
* Typhoon Container Linux nodes have used kubelet-wrapper to rkt/rkt-fly
run the Kubelet via the official k8s.gcr.io hyperkube image using overrides
(new image registry, new image format, restart handling, new mounts, new
entrypoint in v1.17).
* Observation: Most of what it takes to run a Kubelet container is defined
in Typhoon, not in kubelet-wrapper. The wrapper's value is now undermined
by having to workaround its dated defaults. Typhoon may be better served
defining Kubelet.service explicitly
* Typhoon for Fedora CoreOS developed a kubelet.service without the use
of a host OS kubelet-wrapper which is both clearer and eliminated some
volume mounts
2019-12-29 11:17:26 -08:00
Dalton Hubble 50db3d0231 Rename CLC files and favor Terraform list index syntax
* Rename Container Linux Config (CLC) files to *.yaml to align
with Fedora CoreOS Config (FCC) files and for syntax highlighting
* Replace common uses of Terraform `element` (which wraps around)
with `list[index]` syntax to surface index errors
2019-12-28 12:14:01 -08:00
Dalton Hubble 11565ffa8a Update Calico from v3.10.2 to v3.11.1
* https://docs.projectcalico.org/v3.11/release-notes/
2019-12-28 11:08:03 -08:00
Dalton Hubble daa8d9d9ec Update CoreDNS from v1.6.5 to v1.6.6
* https://coredns.io/2019/12/11/coredns-1.6.6-release/
2019-12-22 10:47:19 -05:00
Dalton Hubble c0ce04e1de Update Calico from v3.10.1 to v3.10.2
* https://docs.projectcalico.org/v3.10/release-notes/
2019-12-09 21:03:00 -08:00
Dalton Hubble ed3550dce1 Update systemd services for the v0.17.x hyperkube
* Binary asset locations within the upstream hyperkube image
changed https://github.com/kubernetes/kubernetes/pull/84662
* Fix Container Linux and Flatcar Linux kubelet.service
(rkt-fly with fairly dated CoreOS kubelet-wrapper)
* Fix Fedora CoreOS kubelet.service (podman)
* Fix Fedora CoreOS bootstrap.service
* Fix delete-node kubectl usage for workers where nodes may
delete themselves on shutdown (e.g. preemptible instances)
2019-12-09 18:39:17 -08:00
Dalton Hubble de36d99afc Update Kubernetes from v1.16.3 to v1.17.0
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.17.md/#v1170
2019-12-09 18:31:58 -08:00
Dalton Hubble 4fce9485c8 Reduce kube-controller-manager pod eviction timeout from 5m to 1m
* Reduce time to delete pods on unready nodes from 5m to 1m
* Present since v1.13.3, but mistakenly removed in v1.16.0 static
pod control plane migration

Related:

* https://github.com/poseidon/terraform-render-bootstrap/pull/148
* https://github.com/poseidon/terraform-render-bootstrap/pull/164
2019-12-08 22:58:31 -08:00
Dalton Hubble d9c7a9e049 Add/update docs for asset_dir and kubeconfig usage
* Original tutorials favored including the platform (e.g.
google-cloud) in modules (e.g. google-cloud-yavin). Prefer
naming conventions where each module / cluster has a simple
name (e.g. yavin) since the platform is usually redundant
* Retain the example cluster naming themes per platform
2019-12-05 22:56:42 -08:00
Dalton Hubble 2837275265 Introduce cluster creation without local writes to asset_dir
* Allow generated assets (TLS materials, manifests) to be
securely distributed to controller node(s) via file provisioner
(i.e. ssh-agent) as an assets bundle file, rather than relying
on assets being locally rendered to disk in an asset_dir and
then securely distributed
* Change `asset_dir` from required to optional. Left unset,
asset_dir defaults to "" and no assets will be written to
files on the machine that runs terraform apply
* Enhancement: Managed cluster assets are kept only in Terraform
state, which supports different backends (GCS, S3, etcd, etc) and
optional encryption. terraform apply accesses state, runs in-memory,
and distributes sensitive materials to controllers without making
use of local disk (simplifies use in CI systems)
* Enhancement: Improve asset unpack and layout process to position
etcd certificates and control plane certificates more cleanly,
without unneeded secret materials

Details:

* Terraform file provisioner support for distributing directories of
contents (with unknown structure) has been limited to reading from a
local directory, meaning local writes to asset_dir were required.
https://github.com/poseidon/typhoon/issues/585 discusses the problem
and newer or upcoming Terraform features that might help.
* Observation: Terraform provisioner support for single files works
well, but iteration isn't viable. We're also constrained to Terraform
language features on the apply side (no extra plugins, no shelling out)
and CoreOS / Fedora tools on the receive side.
* Take a map representation of the contents that would have been splayed
out in asset_dir and pack/encode them into a single file format devised
for easy unpacking. Use an awk one-liner on the receive side to unpack.
In pratice, this has worked well and its rather nice that a single
assets file is transferred by file provisioner (all or none)

Rel: https://github.com/poseidon/terraform-render-bootstrap/pull/162
2019-12-05 01:24:50 -08:00
Dalton Hubble 4b485a9bf2 Fix recent deletion of bootstrap module pinned SHA
* Fix deletion of bootstrap module pinned SHA, which was
introduced recently through an automation mistake creating
https://github.com/poseidon/typhoon/pull/589
2019-11-21 22:34:09 -08:00
Dalton Hubble 8a9e8595ae Fix terraform fmt formatting 2019-11-13 23:44:02 -08:00
Dalton Hubble 19ee57dc04 Use GCP region_instance_group_manager version block format
* terraform-provider-google v2.19.0 deprecates `instance_template`
within `google_compute_region_instance_group_manager` in order to
support a scheme with multiple version blocks. Adapt our single
version to the new format to resolve deprecation warnings.
* Fixes: Warning: "instance_template": [DEPRECATED] This field
will be replaced by `version.instance_template` in 3.0.0
* Require terraform-provider-google v2.19.0+ (action required)
2019-11-13 17:41:13 -08:00
Dalton Hubble 0e4ee5efc9 Add small CPU resource requests to static pods
* Set small CPU requests on static pods kube-apiserver,
kube-controller-manager, and kube-scheduler to align with
upstream tooling and for edge cases
* Effectively, a practical case for these requests hasn't been
observed. However, a small static pod CPU request may offer
a slight benefit if a controller became overloaded and the
below mechanisms were insufficient

Existing safeguards:

* Control plane nodes are tainted to isolate them from
ordinary workloads. Even dense workloads can only compress
CPU resources on worker nodes.
* Control plane static pods use the highest priority class, so
contention favors control plane pods (over say node-exporter)
and CPU is compressible too.

See: https://github.com/poseidon/terraform-render-bootstrap/pull/161
2019-11-13 17:18:45 -08:00
Dalton Hubble a271b9f340 Update CoreDNS from v1.6.2 to v1.6.5
* Add health `lameduck` option 5s. Before CoreDNS shuts down, it will
wait and report unhealthy for 5s to allow time for plugins to shutdown
cleanly
* Minor bug fixes over a few releases
* https://coredns.io/2019/08/31/coredns-1.6.3-release/
* https://coredns.io/2019/09/27/coredns-1.6.4-release/
* https://coredns.io/2019/11/05/coredns-1.6.5-release/
2019-11-13 16:47:44 -08:00
Dalton Hubble cb0598e275 Adopt Terraform v0.12 templatefile function
* Update terraform-render-bootstrap module to adopt the
Terrform v0.12 templatefile function feature to replace
the use of terraform-provider-template's `template_dir`
* Require Terraform v0.12.6+ which adds `for_each`

Background:

* `template_dir` was added to `terraform-provider-template`
to add support for template directory rendering in CoreOS
Tectonic Kubernetes distribution (~2017)
* Terraform v0.12 introduced a native `templatefile` function
and v0.12.6 introduced native `for_each` support (July 2019)
that makes it possible to replace `template_dir` usage
2019-11-13 16:33:36 -08:00
Dalton Hubble d7061020ba Update Kubernetes from v1.16.2 to v1.16.3
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.16.md#v1163
2019-11-13 13:05:15 -08:00
Dalton Hubble 2c163503f1 Update etcd from v3.4.2 to v3.4.3
* etcd v3.4.3 builds with Go v1.12.12 instead of v1.12.9
and adds a few minor metrics fixes
* https://github.com/etcd-io/etcd/compare/v3.4.2...v3.4.3
2019-11-07 11:41:01 -08:00
Dalton Hubble 0034a15711 Update Calico from v3.10.0 to v3.10.1
* https://docs.projectcalico.org/v3.10/release-notes/
2019-11-07 11:38:32 -08:00
Dalton Hubble 4775e9d0f7 Upgrade Calico v3.9.2 to v3.10.0
* Allow advertising Kubernetes service ClusterIPs to BGPPeer
routers via a BGPConfiguration
* Improve EdgeRouter docs about routes and BGP
* https://docs.projectcalico.org/v3.10/release-notes/
* https://docs.projectcalico.org/v3.10/networking/advertise-service-ips
2019-10-27 14:13:41 -07:00
Dalton Hubble d418045929 Switch kube-proxy from iptables mode to ipvs mode
* Kubernetes v1.11 considered kube-proxy IPVS mode GA
* Many problems were found #321
* Since then, major blockers seem to have been addressed
2019-10-27 00:37:41 -07:00
Dalton Hubble 24fc440d83 Update Kubernetes from v1.16.1 to v1.16.2
* Update Calico from v3.9.1 to v3.9.2
2019-10-15 22:42:52 -07:00
Dalton Hubble a6702573a2 Update etcd from v3.4.1 to v3.4.2
* https://github.com/etcd-io/etcd/releases/tag/v3.4.2
2019-10-15 00:06:15 -07:00
Dalton Hubble d874bdd17d Update bootstrap module control plane manifests and type constraints
* Remove unneeded control plane flags that correspond to defaults
* Adopt Terraform v0.12 type constraints in bootstrap module
2019-10-06 21:09:30 -07:00
Dalton Hubble 1c5ed84fc2 Update Kubernetes from v1.16.0 to v1.16.1
* https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.16.md#v1161
2019-10-02 21:31:55 -07:00
Dalton Hubble f82266ac8c Add stricter types for GCP modules
* Review variables available in google-cloud kubernetes
and workers modules and in documentation
2019-09-30 22:04:35 -07:00
Dalton Hubble a6de245d8a Rename bootkube.tf to bootstrap.tf
* Typhoon no longer uses the bootkube project
2019-09-29 11:30:49 -07:00
Dalton Hubble 96afa6a531 Update Calico from v3.8.2 to v3.9.1
* https://docs.projectcalico.org/v3.9/release-notes/
2019-09-29 11:22:53 -07:00
Dalton Hubble 3e34fb075b Update etcd from v3.4.0 to v3.4.1
* https://github.com/etcd-io/etcd/releases/tag/v3.4.1
2019-09-28 15:09:57 -07:00
Dalton Hubble 9bfb1c5faf Update docs and variable types for worker node_labels
* Document worker pools `node_labels` variable to set the
initial node labels for a homogeneous set of workers
* Document `worker_node_labels` convenience variable to
set the initial node labels for default worker nodes
2019-09-28 15:05:12 -07:00
Valer Cara 99ab81f79c Add node_labels variable in workers modules to set initial node labels (#550)
* Also add `worker_node_labels` variable in `kubernetes` modules to set
initial node labels for the default workers
2019-09-28 14:59:24 -07:00
Dalton Hubble 5b06e0e869 Organize and cleanup Kubelet ExecStartPre
* Sort Kubelet ExecStartPre mkdir commands
* Remove unused inactive-manifests and checkpoint-secrets
directories (were used by bootkube self-hosting)
2019-09-19 00:38:34 -07:00
Dalton Hubble b951aca66f Create /etc/kubernetes/manifests before asset copy
* Fix issue (present since bootkube->bootstrap switch) where
controller asset copy could fail if /etc/kubernetes/manifests
wasn't created in time on platforms using path activation for
the Kubelet (observed on DigitalOcean, also possible on
bare-metal)
2019-09-19 00:30:53 -07:00
Dalton Hubble 9da3725738 Update Kubernetes from v1.15.3 to v1.16.0
* Drop `node-role.kubernetes.io/master` and
`node-role.kubernetes.io/node` node labels
* Kubelet (v1.16) now rejects the node labels used
in the kubectl get nodes ROLES output
* https://github.com/kubernetes/kubernetes/issues/75457
2019-09-18 22:53:06 -07:00
Dalton Hubble fd12f3612b Rename CA organization from bootkube to typhoon
* Rename the organization in generated CA certificates from
bootkube to typhoon. Avoid confusion with the bootkube project
* https://github.com/poseidon/terraform-render-bootstrap/pull/149
2019-09-14 16:56:53 -07:00
Dalton Hubble 96b646cf6d Rename bootkube modules to bootstrap
* Rename render module from bootkube to bootstrap. Avoid
confusion with the kubernetes-incubator/bootkube tool since
it is no longer used
* Use the poseidon/terraform-render-bootstrap Terraform module
(formerly poseidon/terraform-render-bootkube)
* https://github.com/poseidon/terraform-render-bootkube/pull/149
2019-09-14 16:24:32 -07:00
Dalton Hubble b15c60fa2f Update CHANGES for control plane static pod switch
* Remove old references to bootkube / self-hosted
2019-09-09 22:48:48 -07:00