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Add CoreDNS details to DNS Debug docs #10201

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merged 2 commits into from
Sep 10, 2018

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chrisohaver
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Add details for CoreDNS when they would be different than kube-dns (chiefly the logs section).
Make note of the sysytemd-resolved endless forwarding loop issue in Known Issues (This problem frequently comes up in Slack).

Related: kubernetes/enhancements#566

@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Sep 5, 2018
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k8sio-netlify-preview-bot commented Sep 5, 2018

Deploy preview for kubernetes-io-master-staging ready!

Built with commit 68ffe0f

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thanks for the PR @chrisohaver
added a couple of small nits.

@@ -160,6 +191,12 @@ in the Kubernetes GitHub repository.

## Known issues

Some Linux distros (e.g. Ubuntu), use a local DNS resolver by default (systemd-resolved).
Systemd-resolved moves and replaces /etc/resolv.conf with a stub file that can cause a fatal forwarding
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/etc/resolv.conf should be quoted in ` quotes

@@ -160,6 +191,12 @@ in the Kubernetes GitHub repository.

## Known issues

Some Linux distros (e.g. Ubuntu), use a local DNS resolver by default (systemd-resolved).
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distros -> distributions
so that we try to be more academic. :)

@@ -160,6 +191,12 @@ in the Kubernetes GitHub repository.

## Known issues

Some Linux distros (e.g. Ubuntu), use a local DNS resolver by default (systemd-resolved).
Systemd-resolved moves and replaces /etc/resolv.conf with a stub file that can cause a fatal forwarding
loop when resolving names in upstream servers. This can be fixed manually by using kubelet's `--resolv-conf` flag
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extra space after servers.

Some Linux distros (e.g. Ubuntu), use a local DNS resolver by default (systemd-resolved).
Systemd-resolved moves and replaces /etc/resolv.conf with a stub file that can cause a fatal forwarding
loop when resolving names in upstream servers. This can be fixed manually by using kubelet's `--resolv-conf` flag
to point to the correct resolv.conf (With systemd-resolved, this is `/run/systemd/resolve/resolv.conf`).
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resolv.conf (With

->

resolv.conf (with

resolv.conf is quoted with `

Systemd-resolved moves and replaces /etc/resolv.conf with a stub file that can cause a fatal forwarding
loop when resolving names in upstream servers. This can be fixed manually by using kubelet's `--resolv-conf` flag
to point to the correct resolv.conf (With systemd-resolved, this is `/run/systemd/resolve/resolv.conf`).
kubeadm 1.11 automatically detects systemd-resolved, and adjusts kubelet accordingly.
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and adjusts kubelet accordingly

->

and adjusts the kubelet flags accordingly

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tengqm commented Sep 6, 2018

/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Sep 6, 2018
@k8s-ci-robot k8s-ci-robot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed lgtm "Looks good to me", indicates that a PR is ready to be merged. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Sep 7, 2018
@chrisohaver
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Adressed nits. Made same corrections in other places in the docs for consistency.

Added section on how to enable query logging.

@chrisohaver
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This should go into 1.12.

Do I need to close this PR and re-base/re-open on the 1.12 branch?

@justaugustus
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@chrisohaver -- yep. this needs to be on the release-1.12 branch.

@zparnold zparnold changed the base branch from master to release-1.12 September 10, 2018 13:15
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/approve
/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Sep 10, 2018
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zparnold

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Sep 10, 2018
@k8s-ci-robot k8s-ci-robot merged commit 462817a into kubernetes:release-1.12 Sep 10, 2018
zparnold added a commit that referenced this pull request Sep 17, 2018
@zparnold zparnold mentioned this pull request Sep 17, 2018
k8s-ci-robot pushed a commit that referenced this pull request Sep 17, 2018
* Revert "Add CoreDNS details to DNS Debug docs (#10201)"

This reverts commit 462817a.

* Revert "Add CoreDNS details to the customize DNS doc (#10228)"

This reverts commit e7319ee.

* Revert "coredns default (#10200)"

This reverts commit 698e93b.
detiber pushed a commit to detiber/kubernetes-website that referenced this pull request Sep 19, 2018
* add coredns details

* address nits, add query logging section
zparnold added a commit that referenced this pull request Sep 21, 2018
k8s-ci-robot pushed a commit that referenced this pull request Sep 27, 2018
* Update docs for fields allowed at root of CRD schema (#9973)

* add plugin docs and examples (#10053)

* docs update to promote TaintNodesByCondition to beta (#9626)

* HPA Specificity Improvements (#8757)

Updated the HPA docs to reference the `autoscaling/v2beta2` API version,
and added documentation about the new fields.

* adjust docs for pod ready++ (#10049)

* Remove --cadvisor-port - has been deprecated since v1.10 (#10023)

Change-Id: Id2a685473a243aef492a98ff450759f39e362557

* Add Documentation for Snapshot Feature (#9948)

* Add documentation for snapshot feature

* Update volume-snapshots.md

* Add dry-run to api-concepts (#10033)

* kubeadm-init: Update the offline support section (#10062)

The update includes the following things (in mind with Kubernetes 1.12):

- Remove the 1.8 image versions
- Add the 1.10 image versions that were missing until now
- Include a comment for the missing arch suffixes in 1.12

Signed-off-by: Rostislav M. Georgiev <rostislavg@vmware.com>

* Say bye to `DynamicProvisioningScheduling` (#10157)

The mentioned feature gate is now collapsed into `VolumeScheduling`.

xref: kubernetes/kubernetes#67432

* Update ResourceQuota per PriorityClass state for 1.12 (#10229)

* TokenRequest and TokenRequestProjection now beta (#10161)

xref: kubernetes/kubernetes#67349

* Change feature state for kms provider to beta. (#10230)

KMS Provider will be graduating to beta in v1.12, reflecting this change on the website.

* coredns default (#10200)

* Promote ShareProcessNamespace to beta in docs (#9996)

* Add CoreDNS details to DNS Debug docs (#10201)

* add coredns details

* address nits, add query logging section

* Update docs with topology aware dynamic provisioning (#9939)

* Document topology aware volume binding feature

* update for readability

* Update storage-classes.md

* comma splice

* don't abbreviate

* HPA Algorithm Information Improvements (#9780)

* Update HPA docs with more algorithm details

The HPA docs pointed to an out-of-date document for information on the
algorithm details, which users were finding confusing.  This sticks a
section on the algorithm in the HPA docs instead, documenting both
general behavior and corner cases.

* Add glossary info, HPA docs on quantities

People often ask about the quantity notation when working with the
metrics APIs, so this adds a glossary entry on quantities (since they're
used elsewhere in the system), and a short explantation in the HPA walkthough.

* Information about HPA readiness and stabilization

This adds information about the new changes to HPA readiness and
stabilization from kubernetes/enhancements#591, and other minor changes that
landed in Kubernetes 1.12.

* Update horizontal-pod-autoscale.md

* Audit 1.12 doc (#9953)

* audit 1.12 document

* remove legacy audit feature

kubernetes/kubernetes#65862

* update feature gate doc

* MountPropagation is now GA (#10090)

* RuntimeClass documentation (#10102)

* RuntimeClass documentation

* Update runtime-class.md

* Add documentation for Scheduler performance tuning (#10048)

* Add documentation for Scheduler performance tuning

* Update scheduler-perf-tuning.md

* TTL controller for cleaning up finished resources (#10064)

* TTL controller for cleaning up finished resources

* Address comments

* Update ttlafterfinished.md

* Bump quota configuration api version (#10217)

* Incremental update from master (#10278)

* fix invalid href of cloud controller manager (#10240)

* fix invalid yaml format (#10238)

* update storage-limits doc with Azure disk part (#10224)

update storage-limits doc with Azure disk part

fix comments

* Update kubelet-config-file.md (#10222)

Update link to KubeletConfiguration struct.

* fix a trivial misspelling (#10244)

* Fix cassandra-statefulset.yaml indent level (#10243)

* Mention minimum etcd versions (#10208)

Source: https://groups.google.com/d/msg/kubernetes-dev/jMPA4JzKiY4/HIx2ugvLBAAJ

* fix 404 error (#10250)

* Small verb tweak (#10190)

Present participle, ftw.

* Add AnchorJS logic for header links (#10155)

* Add AnchorJS JavaScript

* Remove existing inpage_heading logic

* Remove underline from anchor tags

* Use single icon and add touch visibility

* Use paragraph link icon for AnchorJS

* Update Sass to use code formatting in docsContent headers

* Update header size coverage to H3-H6

* fix broken link in kubefed.md (#10254)

* Update the version numbers for the X-Remote-Extra- and Impersonate-Extra- key fixes (#9827)

The fix was cherry picked into 1.11.3, 1.10.7, and 1.9.11:

kubernetes/kubernetes#67162
kubernetes/kubernetes#67163
kubernetes/kubernetes#67164

* fix typo (#10168)

* fix typo

* addressing comments.

* Update setup-ha-etcd-with-kubeadm.md

* fix typos (#10252)

* fix description of contribute guide (#10253)

* describe truncate feature about advanced audit (#10236)

* describe truncate feature about advanced audit

* Update audit.md

* docs update to promote ScheduleDaemonSetPods to beta (#9923)

* Dynamic volume limit updates for 1.12 (#10211)

* add a placeholder commit

* Update docs for csi volume limits

* Update storage-limits.md

* Add "MayRunAs" value among other GroupStrategies (#9888)

* Add CoreDNS details to the customize DNS doc (#10228)

* Add CoreDNS details to the customize DNS doc

Rewrite the document to include more details about CoreDNS, since it's now the default from v1.12

* Address comments

* Improve doc wording

* Fix link

* Update dns-custom-nameservers.md

* Update dns-custom-nameservers.md

* Fix secrets docs in 1.12 branch (#10056)

* Fix secrets docs

* Update secret.md

* Revert CoreDNS Docs (#10319)

* Revert "Add CoreDNS details to DNS Debug docs (#10201)"

This reverts commit 462817a.

* Revert "Add CoreDNS details to the customize DNS doc (#10228)"

This reverts commit e7319ee.

* Revert "coredns default (#10200)"

This reverts commit 698e93b.

* Add CRI installation instructions page

Added cri-installation page with CRI installation instructions
Referenced it from kubeadm-init and install-kubeadm pages.

* kubeadm: update API types documentation for 1.12 (#10283)

v1alpha2 -> v1alpha3
MasterConfiguration -> [new-api-types]

* TokenRequest feature documentation (#10295)

* AdvancedAuditing is now GA (#10156)

xref: kubernetes/kubernetes#65862

`AdvancedAuditing` feature is GA in 1.12. This PR adjusts the related
docs.

* update runtime-class.md (#10332)

* update runtime-class.md

* Update runtime-class.md

* Document cross-authorizer permissions for creating RBAC roles (#10015)

* Document cross-authorizer permissions for creating RBAC roles

* Update rbac.md

* kubeadm: update authored content for 1.12 (reference docs and cluster creation) (#10348)

* kubeadm: update authored content in reference docs for 1.12

* kubeadm: add time frame in create-cluster-kubeadm for 1.12

* add AllowedProcMountTypes and ProcMountType to docs (#9911)

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

* kubeadm: add new command line reference (#10306)

Add:
- placeholder files
- include place holder files
- include "renew" sub command
- add missing tabs for "alpha phase kubelet"

* Documenting SCTP support in Kubernetes (#10279)

* Documenting SCTP support in Kubernetes Service, Endpoint, NetworkPolicy and Pod

* Updates based on comments on the PR

* kubectl expose update with SCTP support

* Updated according to comments in the PR

* Revert "kubectl expose update with SCTP support"

This reverts commit 0d5a1e6.

* TLS Bootstrap and Server Cert Rotation feature documentation (#10232)

* TokenRequest feature documentation

* line wrapping to make review not insane

* update content for GA without major refactor

* Update kubelet-tls-bootstrapping.md

* Add clarifications for volume snapshots (#10296)

* Update kubadm ha installation for 1.12 (#10264)

* Update kubadm ha installation for 1.12

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

* update stable version

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

* Update stacked control plane for v1.12 (#2)

* use v1alpha3

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

* more v1alpha3 (#4)

* updates

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

* Document how to run in-tree cloud providers with kubeadm (#10357)

Change-Id: Iab6b996a830503d74a6eb0c507c5f8ca7a39235b

* kubeadm reference doc for release 1.12 (#10359)

* Revert "Revert "Add CoreDNS details to DNS Debug docs (#10201)""

This reverts commit bb30f4d.

* Revert "Revert "Add CoreDNS details to the customize DNS doc (#10228)""

This reverts commit bc23d45.

* Revert "Revert "coredns default (#10200)""

This reverts commit 7f4350d.

* add missing instruction for ha guide (#10374)

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

* kubeadm - Ha upgrade updates (#10340)

* Update HA upgrade docs

* Adds external etcd HA upgrade guide

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

* copyedit

* more edits

* add runasgroup in psp (#10076)

* update KubeletPluginsWatcher feature gate (#10205)

* generated 1.12 docs

* Building Multi-arch images with Manifests (#10379)

In 1.12, a variety of images used in a typical kubernetes installation
have started to using manifests to better support environments with arm
or ppc64le architectures. For example all images used with kubeadm by
default have manifests, another would be all the tests in the
conformance test suite. Here we capture the best practices for everyone
to start using manifests in their own workflows.

Change-Id: I5ba4c5fe55ffc9486a8251760f3352be4f2e1494

* Upgrade docs for v1.12 (#10344)

* generated assets and docs

* remove 1.7

* update 1.12

* update plugin documentation under docs>tasks>extend-kubectl (#10259)

* update plugin documentation under docs>tasks>extend-kubectl

* Update kubectl-plugins.md
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