ZeroDownTime/KubeZero
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a3928364 feat: migrate all buildah cmds to podman only
d67a80e9 feat: make push and rm-image more resilient, prevent exit codes
8e202d4f fix: do not add non-existent images
6ef8d28d feat: ensure bash and safe exec
06fcff50 feat: improve image cleanup to incl. all tags and repositories
47b4da4b feat: add suport for trivyignore file

git-subtree-dir: .ci
git-subtree-split: a3928364782156003f828ee4639d12b51bb5d9d9
This commit is contained in:
Stefan Reimer 2024-10-28 16:20:49 +00:00
parent 5dff2c18d4
commit 352221eb26
921 changed files with 43 additions and 160677 deletions
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# ci-tools-lib
Various toolchain bits and pieces shared between projects
# Quickstart
Create top-level Makefile
```
REGISTRY := <your-registry>
IMAGE := <image_name>
REGION := <AWS region of your registry>
include .ci/podman.mk
```
Add subtree to your project:
```
git subtree add --prefix .ci https://git.zero-downtime.net/ZeroDownTime/ci-tools-lib.git master --squash
```
## Jenkins
Shared groovy libraries
## Make
Common Makefile include

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*.png filter=lfs diff=lfs merge=lfs -text

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# Vim
*.swp
.vscode
.DS_Store
.idea
**/*.tgz
# Breaks Helm V3 dependencies in Argo
Chart.lock
kubezero-repo.???

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# Only our own charts, see Makefile
charts/

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# template: "/tmp/doesntexist"
linkReferences: true

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CHANGELOG.md
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# Changelog
## KubeZero - 2.18 ( Argoless )
### High level / Admin changes
- ArgoCD is now optional and NOT required nor used during initial cluster bootstrap
- the bootstrap process now uses the same config and templates as the optional ArgoCD applications later on
- the bootstrap is can now be restarted at any time and considerably faster
- the top level KubeZero config for the ArgoCD app-of-apps is now also maintained via the gitops workflow. Changes can be applied by a simple git push rather than manual scripts
### Calico
- version bump
### Cert-manager
- local issuers are now cluster issuer to allow them being used across namespaces
- all cert-manager resources moved into the cert-manager namespace
- version bump to 1.10
### Kiam
- set priorty class to cluster essential
- certificates are now issued by the cluster issuer
### EBS / EFS
- version bump
### Istio
- istio operator removed, deployment migrated to helm, various cleanups
- version bump to 1.8
- all ingress resources are now in the dedicated new namespace istio-ingress ( deployed via separate kubezero chart istio-ingress)
- set priorty class of ingress components to cluster essential
### Logging
- ES/Kibana version bump to 7.10
- ECK operator is now installed on demand in logging ns
- Custom event fields configurable via new fluent-bit chart
e.g. clustername could be added to each event allowing easy filtering in case multiple clusters stream events into a single central ES cluster
### ArgoCD
- version bump, new app of app architecure
### Metrics
- version bump
- all servicemonitor resources are now in the same namespaces as the respective apps to avoid deployments across multiple namespaces
### upstream Kubernetes 1.18
https://sysdig.com/blog/whats-new-kubernetes-1-18/

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ARG ALPINE_VERSION=3.19
FROM docker.io/alpine:${ALPINE_VERSION}
ARG ALPINE_VERSION
ARG KUBE_VERSION=1.28.9
RUN cd /etc/apk/keys && \
wget "https://cdn.zero-downtime.net/alpine/stefan@zero-downtime.net-61bb6bfb.rsa.pub" && \
echo "@kubezero https://cdn.zero-downtime.net/alpine/v${ALPINE_VERSION}/kubezero" >> /etc/apk/repositories && \
echo "@edge-testing http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
echo "@edge-community http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories && \
apk upgrade -U -a --no-cache && \
apk --no-cache add \
jq \
yq \
diffutils \
bash \
python3 \
py3-yaml \
restic \
helm \
cri-tools@kubezero \
kubeadm@kubezero~=${KUBE_VERSION} \
kubectl@kubezero~=${KUBE_VERSION} \
etcdhelper@kubezero \
etcd-ctl@edge-testing
RUN helm repo add kubezero https://cdn.zero-downtime.net/charts && \
mkdir -p /var/lib/kubezero
ADD admin/kubezero.sh admin/libhelm.sh admin/migrate_argo_values.py /usr/bin
ADD admin/libhelm.sh /var/lib/kubezero
ADD charts/kubeadm /charts/kubeadm
ADD charts/kubezero /charts/kubezero
ENTRYPOINT ["kubezero.sh"]

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means of facilitating copying of software. This Corresponding Source
shall include the Corresponding Source for any work covered by version 3
of the GNU General Public License that is incorporated pursuant to the
following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
### 14. Revised Versions of this License
The Free Software Foundation may publish revised and/or new versions of
the GNU Affero General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU Affero General
Public License “or any later version” applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
### 15. Disclaimer of Warranty
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
### 16. Limitation of Liability
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
### 17. Interpretation of Sections 15 and 16
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
_END OF TERMS AND CONDITIONS_
## How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the “copyright” line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a “Source” link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a “copyright disclaimer” for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
&lt;<http://www.gnu.org/licenses/>&gt;.

25
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@ -1,25 +0,0 @@
REGISTRY := public.ecr.aws/zero-downtime
IMAGE := kubezero-admin
REGION := us-east-1
# Use KubeZero chart version rather than git tag for admin image
GIT_TAG = v$(shell yq .version < charts/kubezero/Chart.yaml)
# Also tag as Kubernetes major version
EXTRA_TAGS = $(shell echo $(GIT_TAG) | awk -F '.' '{ print $$1 "." $$2 }')
include .ci/podman.mk
update-charts:
./scripts/update_helm.sh
update-chart-docs:
for c in charts/*; do \
[[ $$c =~ "kubezero-lib" ]] && continue ; \
[[ $$c =~ "kubeadm" ]] && continue ; \
helm-docs -c $$c ; \
done
publish-charts:
./scripts/publish.sh

116
README.md
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@ -1,107 +1,25 @@
KubeZero - Zero Down Time Kubernetes platform
========================
KubeZero is a Kubernetes distribution providing an integrated container platform so you can focus on your applications.
# ci-tools-lib
# Design philosophy
Various toolchain bits and pieces shared between projects
- Focus on security and simplicity over feature creep
- No vendor lock in, most components are optional and could be easily changed as needed
- No premium services / subscriptions required
- Staying up to date and contributing back to upstream projects, like alpine-cloud-images and others
- Cloud provider agnostic, bare-metal/self-hosted
- Organic Open Source / open and permissive licenses over closed-source solutions
- Corgi approved :dog:
# Quickstart
Create top-level Makefile
```
REGISTRY := <your-registry>
IMAGE := <image_name>
REGION := <AWS region of your registry>
# Architecture
![aws_architecture](docs/aws_architecture.png)
# Version / Support Matrix
KubeZero releases track the same *minor* version of Kubernetes.
Any 1.26.X-Y release of Kubezero supports any Kubernetes cluster 1.26.X.
KubeZero is distributed as a collection of versioned Helm charts, allowing custom upgrade schedules and module versions as needed.
```mermaid
%%{init: {'theme':'dark'}}%%
gantt
title KubeZero Support Timeline
dateFormat YYYY-MM-DD
section 1.27
beta :127b, 2023-09-01, 2023-09-30
release :after 127b, 2024-04-30
section 1.28
beta :128b, 2024-03-01, 2024-04-30
release :after 128b, 2024-08-31
section 1.29
beta :129b, 2024-07-01, 2024-08-30
release :after 129b, 2024-11-30
include .ci/podman.mk
```
[Upstream release policy](https://kubernetes.io/releases/)
Add subtree to your project:
```
git subtree add --prefix .ci https://git.zero-downtime.net/ZeroDownTime/ci-tools-lib.git master --squash
```
# Components
## OS
- all compute nodes are running on Alpine V3.19
- 1 or 2 GB encrypted root file system
- no external dependencies at boot time, apart from container registries
- minimal attack surface
- extremely small memory footprint / overhead
- cri-o container runtime incl. AppArmor support
## Jenkins
Shared groovy libraries
## GitOps
- cli / cmd line install
- optional full ArgoCD support and integration
## Featured workloads
- rootless CI/CD build platform to build containers as part of a CI pipeline, using podman / fuse device plugin support
- containerized AI models via integrated out of the box support for Nvidia GPU workers as well as AWS Neuron
## Control plane
- all Kubernetes components compiled against Alpine OS using `buildmode=pie`
- support for single node control plane for small clusters / test environments to reduce costs
- access to control plane from within the VPC only by default ( VPN access required for Admin tasks )
- controller nodes are used for various platform admin controllers / operators to reduce costs and noise on worker nodes
## AWS integrations
- IAM roles for service accounts allowing each pod to assume individual IAM roles
- access to meta-data services is blocked all workload containers on all nodes
- all IAM roles are maintained via CloudBender automation
- aws-node-termination handler integrated
- support for spot instances per worker group incl. early draining etc.
- support for [Inf1 instances](https://aws.amazon.com/ec2/instance-types/inf1/) part of [AWS Neuron](https://aws.amazon.com/machine-learning/neuron/).
## Network
- Cilium using Geneve encapsulation, incl. increased MTU allowing flexible / more containers per worker node compared to eg. AWS VPC CNI
- Multus support for multiple network interfaces per pod, eg. additional AWS CNI
- no restrictions on IP space / sizing from the underlying VPC architecture
## Storage
- flexible EBS support incl. zone awareness
- EFS support via automated EFS provisioning for worker groups via CloudBender automation
- local storage provider (OpenEBS LVM) for latency sensitive high performance workloads
- CSI Snapshot controller and Gemini snapshot groups and retention
## Ingress
- AWS Network Loadbalancer and Istio Ingress controllers
- no additional costs per exposed service
- real client source IP available to workloads via HTTP header and access logs
- ACME SSL Certificate handling via cert-manager incl. renewal etc.
- support for TCP services
- optional rate limiting support
- optional full service mesh
## Metrics
- Prometheus support for all components, incl. out of cluster EC2 instances (node_exporter)
- automated service discovery allowing instant access to common workload metrics
- pre-configured Grafana dashboards and alerts
- Alertmanager events via SNSAlertHub to Slack, Google, Matrix, etc.
## Logging
- all container logs are enhanced with Kubernetes and AWS metadata to provide context for each message
- flexible ElasticSearch setup, leveraging the ECK operator, for easy maintenance & minimal admin knowledge required, incl. automated backups to S3
- Kibana allowing easy search and dashboards for all logs, incl. pre configured index templates and index management
- [fluentd-concerter](https://git.zero-downtime.net/ZeroDownTime/container-park/src/branch/master/fluentd-concenter) service providing queuing during highload as well as additional parsing options
- lightweight fluent-bit agents on each node requiring minimal resources forwarding logs secure via TLS to fluentd-concenter
## Make
Common Makefile include

12
admin/README.md
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@ -1,12 +0,0 @@
# Cluster upgrade flow
## During 1.23 upgrade
- create new kubezero-values CM if not exists yet, by merging parts of the legacy /etc/kubernetes/kubeadm-values.yaml values with potentially existing values from kubezero ArgoCD app values
# General flow
- No ArgoCD -> user kubezero-values CM
- ArgoCD -> update kubezero-values CM with current values from ArgoCD app values
- Apply any upgrades / migrations

84
admin/dev_apply.sh
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@ -1,84 +0,0 @@
#!/bin/bash
#set -eEx
#set -o pipefail
set -x
ARTIFACTS=($(echo $1 | tr "," "\n"))
ACTION=${2:-apply}
#VERSION="latest"
KUBE_VERSION="$(kubectl version -o json | jq -r .serverVersion.gitVersion)"
WORKDIR=$(mktemp -p /tmp -d kubezero.XXX)
[ -z "$DEBUG" ] && trap 'rm -rf $WORKDIR' ERR EXIT
SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
# shellcheck disable=SC1091
. "$SCRIPT_DIR"/libhelm.sh
CHARTS="$(dirname $SCRIPT_DIR)/charts"
### Various hooks for modules
################
# cert-manager #
################
function cert-manager-post() {
# If any error occurs, wait for initial webhook deployment and try again
# see: https://cert-manager.io/docs/concepts/webhook/#webhook-connection-problems-shortly-af
ter-cert-manager-installation
if [ $rc -ne 0 ]; then
wait_for "kubectl get deployment -n $namespace cert-manager-webhook"
kubectl rollout status deployment -n $namespace cert-manager-webhook
wait_for 'kubectl get validatingwebhookconfigurations -o yaml | grep "caBundle: LS0"'
apply
fi
wait_for "kubectl get ClusterIssuer -n $namespace kubezero-local-ca-issuer"
kubectl wait --timeout=180s --for=condition=Ready -n $namespace ClusterIssuer/kubezero-local
-ca-issuer
}
###########
# ArgoCD #
###########
function argocd-pre() {
for f in $CLUSTER/secrets/argocd-*.yaml; do
kubectl apply -f $f
done
}
###########
# Metrics #
###########
# Cleanup patch jobs from previous runs , ArgoCD does this automatically
function metrics-pre() {
kubectl delete jobs --field-selector status.successful=1 -n monitoring
}
### Main
get_kubezero_values
# Always use embedded kubezero chart
helm template $CHARTS/kubezero -f $WORKDIR/kubezero-values.yaml --kube-version $KUBE_VERSION --version ~$KUBE_VERSION --devel --output-dir $WORKDIR
# Resolve all the all enabled artifacts
if [ ${ARTIFACTS[0]} == "all" ]; then
ARTIFACTS=($(ls $WORKDIR/kubezero/templates | sed -e 's/.yaml//g'))
fi
if [ $ACTION == "apply" -o $ACTION == "crds" ]; then
for t in ${ARTIFACTS[@]}; do
_helm $ACTION $t || true
done
# Delete in reverse order, continue even if errors
elif [ $ACTION == "delete" ]; then
set +e
for (( idx=${#ARTIFACTS[@]}-1 ; idx>=0 ; idx-- )) ; do
_helm delete ${ARTIFACTS[idx]} || true
done
fi

406
admin/kubezero.sh
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@ -1,406 +0,0 @@
#!/bin/bash -e
if [ -n "$DEBUG" ]; then
set -x
LOG="--v=5"
fi
# include helm lib
. /var/lib/kubezero/libhelm.sh
# Export vars to ease use in debug_shell etc
export WORKDIR=/tmp/kubezero
export HOSTFS=/host
export CHARTS=/charts
export KUBE_VERSION=$(kubeadm version -o json | jq -r .clientVersion.gitVersion)
export KUBE_VERSION_MINOR=$(echo $KUBE_VERSION | sed -e 's/\.[0-9]*$//')
export KUBECONFIG="${HOSTFS}/root/.kube/config"
# etcd
export ETCDCTL_API=3
export ETCDCTL_CACERT=${HOSTFS}/etc/kubernetes/pki/etcd/ca.crt
export ETCDCTL_CERT=${HOSTFS}/etc/kubernetes/pki/apiserver-etcd-client.crt
export ETCDCTL_KEY=${HOSTFS}/etc/kubernetes/pki/apiserver-etcd-client.key
mkdir -p ${WORKDIR}
# Generic retry utility
retry() {
local tries=$1
local waitfor=$2
local timeout=$3
shift 3
while true; do
type -tf $1 >/dev/null && { timeout $timeout $@ && return; } || { $@ && return; }
let tries=$tries-1
[ $tries -eq 0 ] && return 1
sleep $waitfor
done
}
_kubeadm() {
kubeadm $@ --config /etc/kubernetes/kubeadm.yaml --rootfs ${HOSTFS} $LOG
}
# Render cluster config
render_kubeadm() {
helm template $CHARTS/kubeadm --output-dir ${WORKDIR} -f ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml
# Assemble kubeadm config
cat /dev/null > ${HOSTFS}/etc/kubernetes/kubeadm.yaml
for f in Cluster Init Join KubeProxy Kubelet; do
# echo "---" >> /etc/kubernetes/kubeadm.yaml
cat ${WORKDIR}/kubeadm/templates/${f}Configuration.yaml >> ${HOSTFS}/etc/kubernetes/kubeadm.yaml
done
# "uncloak" the json patches after they got processed by helm
for s in apiserver controller-manager scheduler; do
yq eval '.json' ${WORKDIR}/kubeadm/templates/patches/kube-${s}1\+json.yaml > /tmp/_tmp.yaml && \
mv /tmp/_tmp.yaml ${WORKDIR}/kubeadm/templates/patches/kube-${s}1\+json.yaml
done
}
parse_kubezero() {
export CLUSTERNAME=$(yq eval '.global.clusterName // .clusterName' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml)
export HIGHAVAILABLE=$(yq eval '.global.highAvailable // .highAvailable // "false"' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml)
export ETCD_NODENAME=$(yq eval '.etcd.nodeName' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml)
export NODENAME=$(yq eval '.nodeName' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml)
export PROVIDER_ID=$(yq eval '.providerID // ""' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml)
export AWS_IAM_AUTH=$(yq eval '.api.awsIamAuth.enabled // "false"' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml)
# From here on bail out, allows debug_shell even in error cases
set -e
}
# Shared steps before calling kubeadm
pre_kubeadm() {
# update all apiserver addons first
cp -r ${WORKDIR}/kubeadm/templates/apiserver ${HOSTFS}/etc/kubernetes
# aws-iam-authenticator enabled ?
if [ "$AWS_IAM_AUTH" == "true" ]; then
# Initialize webhook
if [ ! -f ${HOSTFS}/etc/kubernetes/pki/aws-iam-authenticator.crt ]; then
${HOSTFS}/usr/bin/aws-iam-authenticator init -i ${CLUSTERNAME}
mv key.pem ${HOSTFS}/etc/kubernetes/pki/aws-iam-authenticator.key
mv cert.pem ${HOSTFS}/etc/kubernetes/pki/aws-iam-authenticator.crt
fi
# Patch the aws-iam-authenticator config with the actual cert.pem
yq eval -Mi ".clusters[0].cluster.certificate-authority-data = \"$(cat ${HOSTFS}/etc/kubernetes/pki/aws-iam-authenticator.crt| base64 -w0)\"" ${HOSTFS}/etc/kubernetes/apiserver/aws-iam-authenticator.yaml
fi
# copy patches to host to make --rootfs of kubeadm work
cp -r ${WORKDIR}/kubeadm/templates/patches /host/tmp/
}
# Shared steps after calling kubeadm
post_kubeadm() {
# KubeZero resources
for f in ${WORKDIR}/kubeadm/templates/resources/*.yaml; do
kubectl apply -f $f $LOG
done
# Patch coreDNS addon, ideally we prevent kubeadm to reset coreDNS to its defaults
kubectl patch deployment coredns -n kube-system --patch-file ${WORKDIR}/kubeadm/templates/patches/coredns0.yaml $LOG
rm -rf /host/tmp/patches
}
kubeadm_upgrade() {
# pre upgrade hook
# get current values, argo app over cm
get_kubezero_values
# tumble new config through migrate.py
migrate_argo_values.py < "$WORKDIR"/kubezero-values.yaml > "$WORKDIR"/new-kubezero-values.yaml
# Update kubezero-values CM
kubectl get cm -n kube-system kubezero-values -o=yaml | \
yq e '.data."values.yaml" |= load_str("/tmp/kubezero/new-kubezero-values.yaml")' | \
kubectl replace -f -
# update argo app
kubectl get application kubezero -n argocd -o yaml | \
kubezero_chart_version=$(yq .version /charts/kubezero/Chart.yaml) \
yq '.spec.source.helm.values |= load_str("/tmp/kubezero/new-kubezero-values.yaml") | .spec.source.targetRevision = strenv(kubezero_chart_version)' | \
kubectl apply -f -
# finally remove annotation to allow argo to sync again
kubectl patch app kubezero -n argocd --type json -p='[{"op": "remove", "path": "/metadata/annotations"}]'
# Local node upgrade
render_kubeadm
pre_kubeadm
# Upgrade
_kubeadm upgrade apply -y --patches /tmp/patches
post_kubeadm
# If we have a re-cert kubectl config install for root
if [ -f ${HOSTFS}/etc/kubernetes/admin.conf ]; then
cp ${HOSTFS}/etc/kubernetes/admin.conf ${HOSTFS}/root/.kube/config
fi
# post upgrade hook
[ -f /var/lib/kubezero/post-upgrade.sh ] && . /var/lib/kubezero/post-upgrade.sh
# Cleanup after kubeadm on the host
rm -rf ${HOSTFS}/etc/kubernetes/tmp
echo "Successfully upgraded kubeadm control plane."
# TODO
# Send Notification currently done via CloudBender -> SNS -> Slack
# Better deploy https://github.com/opsgenie/kubernetes-event-exporter and set proper routes and labels on this Job
# Removed:
# - update oidc do we need that ?
}
control_plane_node() {
CMD=$1
render_kubeadm
# Ensure clean slate if bootstrap, restore PKI otherwise
if [[ "$CMD" =~ ^(bootstrap)$ ]]; then
rm -rf ${HOSTFS}/var/lib/etcd/member
else
# restore latest backup
retry 10 60 30 restic restore latest --no-lock -t / # --tag $KUBE_VERSION_MINOR
# Make last etcd snapshot available
cp ${WORKDIR}/etcd_snapshot ${HOSTFS}/etc/kubernetes
# Put PKI in place
cp -r ${WORKDIR}/pki ${HOSTFS}/etc/kubernetes
# Always use kubeadm kubectl config to never run into chicken egg with custom auth hooks
cp ${WORKDIR}/admin.conf ${HOSTFS}/root/.kube/config
# Only restore etcd data during "restore" and none exists already
if [[ "$CMD" =~ ^(restore)$ ]]; then
if [ ! -d ${HOSTFS}/var/lib/etcd/member ]; then
etcdctl snapshot restore ${HOSTFS}/etc/kubernetes/etcd_snapshot \
--name $ETCD_NODENAME \
--data-dir="${HOSTFS}/var/lib/etcd" \
--initial-cluster-token etcd-${CLUSTERNAME} \
--initial-advertise-peer-urls https://${ETCD_NODENAME}:2380 \
--initial-cluster $ETCD_NODENAME=https://${ETCD_NODENAME}:2380
fi
fi
fi
# Delete old node certs in case they are around
rm -f ${HOSTFS}/etc/kubernetes/pki/etcd/peer.* ${HOSTFS}/etc/kubernetes/pki/etcd/server.* ${HOSTFS}/etc/kubernetes/pki/etcd/healthcheck-client.* \
${HOSTFS}/etc/kubernetes/pki/apiserver* ${HOSTFS}/etc/kubernetes/pki/front-proxy-client.*
# Issue all certs first, needed for eg. aws-iam-authenticator setup
_kubeadm init phase certs all
pre_kubeadm
# Pull all images
_kubeadm config images pull
_kubeadm init phase preflight
_kubeadm init phase kubeconfig all
if [[ "$CMD" =~ ^(join)$ ]]; then
# Delete any former self in case forseti did not delete yet
kubectl delete node ${NODENAME} --wait=true || true
# Wait for all pods to be deleted otherwise we end up with stale pods eg. kube-proxy and all goes to ....
kubectl delete pods -n kube-system --field-selector spec.nodeName=${NODENAME}
# get current running etcd pods for etcdctl commands
while true; do
etcd_endpoints=$(kubectl get pods -n kube-system -l component=etcd -o yaml | \
yq eval '.items[].metadata.annotations."kubeadm.kubernetes.io/etcd.advertise-client-urls"' - | tr '\n' ',' | sed -e 's/,$//')
[[ $etcd_endpoints =~ ^https:// ]] && break
sleep 3
done
# see if we are a former member and remove our former self if so
MY_ID=$(etcdctl member list --endpoints=$etcd_endpoints | grep $ETCD_NODENAME | awk '{print $1}' | sed -e 's/,$//')
[ -n "$MY_ID" ] && retry 12 5 5 etcdctl member remove $MY_ID --endpoints=$etcd_endpoints
# flush etcd data directory as joining with previous storage seems flaky, especially during etcd version upgrades
rm -rf ${HOSTFS}/var/lib/etcd/member
# Announce new etcd member and capture ETCD_INITIAL_CLUSTER, retry needed in case another node joining causes temp quorum loss
ETCD_ENVS=$(retry 12 5 5 etcdctl member add $ETCD_NODENAME --peer-urls="https://${ETCD_NODENAME}:2380" --endpoints=$etcd_endpoints)
export $(echo "$ETCD_ENVS" | grep ETCD_INITIAL_CLUSTER= | sed -e 's/"//g')
# Patch kubeadm-values.yaml and re-render to get etcd manifest patched
yq eval -i '.etcd.state = "existing"
| .etcd.initialCluster = strenv(ETCD_INITIAL_CLUSTER)
' ${HOSTFS}/etc/kubernetes/kubeadm-values.yaml
render_kubeadm
fi
# Generate our custom etcd yaml
_kubeadm init phase etcd local
_kubeadm init phase control-plane all
_kubeadm init phase kubelet-start
cp ${HOSTFS}/etc/kubernetes/admin.conf ${HOSTFS}/root/.kube/config
# Wait for api to be online
echo "Waiting for Kubernetes API to be online ..."
retry 0 5 30 kubectl cluster-info --request-timeout 3 >/dev/null
# Update providerID as underlying VM changed during restore
if [[ "$CMD" =~ ^(restore)$ ]]; then
if [ -n "$PROVIDER_ID" ]; then
etcdhelper \
-cacert ${HOSTFS}/etc/kubernetes/pki/etcd/ca.crt \
-cert ${HOSTFS}/etc/kubernetes/pki/etcd/server.crt \
-key ${HOSTFS}/etc/kubernetes/pki/etcd/server.key \
-endpoint https://${ETCD_NODENAME}:2379 \
change-provider-id ${NODENAME} $PROVIDER_ID
fi
fi
if [[ "$CMD" =~ ^(bootstrap|restore)$ ]]; then
_kubeadm init phase upload-config all
_kubeadm init phase upload-certs --skip-certificate-key-print
# This sets up the ClusterRoleBindings to allow bootstrap nodes to create CSRs etc.
_kubeadm init phase bootstrap-token --skip-token-print
fi
_kubeadm init phase mark-control-plane
_kubeadm init phase kubelet-finalize all
if [[ "$CMD" =~ ^(bootstrap|restore)$ ]]; then
_kubeadm init phase addon all
fi
# Ensure aws-iam-authenticator secret is in place
if [ "$AWS_IAM_AUTH" == "true" ]; then
kubectl get secrets -n kube-system aws-iam-certs || \
kubectl create secret generic aws-iam-certs -n kube-system \
--from-file=key.pem=${HOSTFS}/etc/kubernetes/pki/aws-iam-authenticator.key \
--from-file=cert.pem=${HOSTFS}/etc/kubernetes/pki/aws-iam-authenticator.crt
# Store aws-iam-auth admin on SSM
yq eval -M ".clusters[0].cluster.certificate-authority-data = \"$(cat ${HOSTFS}/etc/kubernetes/pki/ca.crt | base64 -w0)\"" ${WORKDIR}/kubeadm/templates/admin-aws-iam.yaml > ${HOSTFS}/etc/kubernetes/admin-aws-iam.yaml
fi
post_kubeadm
echo "${1} cluster $CLUSTERNAME successfull."
}
apply_module() {
MODULES=$1
get_kubezero_values
# Always use embedded kubezero chart
helm template $CHARTS/kubezero -f $WORKDIR/kubezero-values.yaml --version ~$KUBE_VERSION --devel --output-dir $WORKDIR
# CRDs first
for t in $MODULES; do
_helm crds $t
done
for t in $MODULES; do
_helm apply $t
done
echo "Applied KubeZero modules: $MODULES"
}
delete_module() {
MODULES=$1
get_kubezero_values
# Always use embedded kubezero chart
helm template $CHARTS/kubezero -f $WORKDIR/kubezero-values.yaml --version ~$KUBE_VERSION --devel --output-dir $WORKDIR
for t in $MODULES; do
_helm delete $t
done
echo "Deleted KubeZero modules: $MODULES. Potential CRDs must be removed manually."
}
# backup etcd + /etc/kubernetes/pki
backup() {
# Display all ENVs, careful this exposes the password !
[ -n "$DEBUG" ] && env
restic snapshots || restic init || exit 1
CV=$(kubectl version -o json | jq .serverVersion.minor -r)
let PCV=$CV-1
CLUSTER_VERSION="v1.$CV"
PREVIOUS_VERSION="v1.$PCV"
etcdctl --endpoints=https://${ETCD_NODENAME}:2379 snapshot save ${WORKDIR}/etcd_snapshot
# pki & cluster-admin access
cp -r ${HOSTFS}/etc/kubernetes/pki ${WORKDIR}
cp -r ${HOSTFS}/etc/kubernetes/admin.conf ${WORKDIR}
# Backup via restic
restic backup ${WORKDIR} -H $CLUSTERNAME --tag $CLUSTER_VERSION
echo "Backup complete."
# Remove backups from pre-previous versions
restic forget --keep-tag $CLUSTER_VERSION --keep-tag $PREVIOUS_VERSION --prune
# Regular retention
restic forget --keep-hourly 24 --keep-daily ${RESTIC_RETENTION:-7} --prune
# Defrag etcd backend
etcdctl --endpoints=https://${ETCD_NODENAME}:2379 defrag
}
debug_shell() {
echo "Entering debug shell"
printf "For manual etcdctl commands use:\n # export ETCDCTL_ENDPOINTS=$ETCD_NODENAME:2379\n"
/bin/bash
}
# First parse kubeadm-values.yaml
parse_kubezero
# Execute tasks
for t in $@; do
case "$t" in
kubeadm_upgrade) kubeadm_upgrade;;
bootstrap) control_plane_node bootstrap;;
join) control_plane_node join;;
restore) control_plane_node restore;;
apply_*) apply_module "${t##apply_}";;
delete_*) delete_module "${t##delete_}";;
backup) backup;;
debug_shell) debug_shell;;
*) echo "Unknown command: '$t'";;
esac
done

309
admin/libhelm.sh
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@ -1,309 +0,0 @@
#!/bin/bash
# Simulate well-known CRDs being available
API_VERSIONS="-a monitoring.coreos.com/v1 -a snapshot.storage.k8s.io/v1 -a policy/v1/PodDisruptionBudget"
#VERSION="latest"
VERSION="v1.28"
# Waits for max 300s and retries
function wait_for() {
local TRIES=0
while true; do
eval " $@" && break
[ $TRIES -eq 100 ] && return 1
let TRIES=$TRIES+1
sleep 3
done
}
function chart_location() {
echo "$1 --repo https://cdn.zero-downtime.net/charts"
}
function argo_used() {
kubectl get application kubezero -n argocd >/dev/null && rc=$? || rc=$?
return $rc
}
# get kubezero-values from ArgoCD if available or use in-cluster CM without Argo
function get_kubezero_values() {
argo_used && \
{ kubectl get application kubezero -n argocd -o yaml | yq .spec.source.helm.values > ${WORKDIR}/kubezero-values.yaml; } || \
{ kubectl get configmap -n kube-system kubezero-values -o yaml | yq '.data."values.yaml"' > ${WORKDIR}/kubezero-values.yaml ;}
}
function disable_argo() {
cat > _argoapp_patch.yaml <<EOF
spec:
syncWindows:
- kind: deny
schedule: '0 * * * *'
duration: 24h
namespaces:
- '*'
EOF
kubectl patch appproject kubezero -n argocd --patch-file _argoapp_patch.yaml --type=merge && rm _argoapp_patch.yaml
echo "Enabled service window for ArgoCD project kubezero"
}
function enable_argo() {
kubectl patch appproject kubezero -n argocd --type json -p='[{"op": "remove", "path": "/spec/syncWindows"}]' || true
echo "Removed service window for ArgoCD project kubezero"
}
function cntFailedPods() {
NS=$1
NR=$(kubectl get pods -n $NS --field-selector="status.phase!=Succeeded,status.phase!=Running" -o custom-columns="POD:metadata.name" -o json | jq '.items | length')
echo $NR
}
function waitSystemPodsRunning() {
while true; do
[ "$(cntFailedPods kube-system)" -eq 0 ] && break
sleep 3
done
}
function argo_app_synced() {
APP=$1
# Ensure we are synced otherwise bail out
status=$(kubectl get application $APP -n argocd -o yaml | yq .status.sync.status)
if [ "$status" != "Synced" ]; then
echo "ArgoCD Application $APP not 'Synced'!"
return 1
fi
return 0
}
# make sure namespace exists prior to calling helm as the create-namespace options doesn't work
function create_ns() {
local namespace=$1
if [ "$namespace" != "kube-system" ]; then
kubectl get ns $namespace || kubectl create ns $namespace
fi
}
# delete non kube-system ns
function delete_ns() {
local namespace=$1
[ "$namespace" != "kube-system" ] && kubectl delete ns $namespace
}
# Extract crds via helm calls and apply delta=crds only
function _crds() {
helm template $(chart_location $chart) -n $namespace --name-template $module $targetRevision --skip-crds --set ${module}.installCRDs=false -f $WORKDIR/values.yaml $API_VERSIONS --kube-version $KUBE_VERSION > $WORKDIR/helm-no-crds.yaml
helm template $(chart_location $chart) -n $namespace --name-template $module $targetRevision --include-crds --set ${module}.installCRDs=true -f $WORKDIR/values.yaml $API_VERSIONS --kube-version $KUBE_VERSION > $WORKDIR/helm-crds.yaml
diff -e $WORKDIR/helm-no-crds.yaml $WORKDIR/helm-crds.yaml | head -n-1 | tail -n+2 > $WORKDIR/crds.yaml
# Only apply if there are actually any crds
if [ -s $WORKDIR/crds.yaml ]; then
[ -n "$DEBUG" ] && cat $WORKDIR/crds.yaml
kubectl apply -f $WORKDIR/crds.yaml --server-side --force-conflicts
fi
}
# helm template | kubectl apply -f -
# confine to one namespace if possible
function render() {
helm template $(chart_location $chart) -n $namespace --name-template $module $targetRevision --skip-crds -f $WORKDIR/values.yaml $API_VERSIONS --kube-version $KUBE_VERSION $@ \
| python3 -c '
#!/usr/bin/python3
import yaml
import sys
for manifest in yaml.safe_load_all(sys.stdin):
if manifest:
if "metadata" in manifest and "namespace" not in manifest["metadata"]:
manifest["metadata"]["namespace"] = sys.argv[1]
print("---")
print(yaml.dump(manifest))' $namespace > $WORKDIR/helm.yaml
}
function _helm() {
local action=$1
local module=$2
# check if module is even enabled and return if not
[ ! -f $WORKDIR/kubezero/templates/${module}.yaml ] && { echo "Module $module disabled. No-op."; return 0; }
local chart="$(yq eval '.spec.source.chart' $WORKDIR/kubezero/templates/${module}.yaml)"
local namespace="$(yq eval '.spec.destination.namespace' $WORKDIR/kubezero/templates/${module}.yaml)"
targetRevision=""
_version="$(yq eval '.spec.source.targetRevision' $WORKDIR/kubezero/templates/${module}.yaml)"
[ -n "$_version" ] && targetRevision="--version $_version"
yq eval '.spec.source.helm.values' $WORKDIR/kubezero/templates/${module}.yaml > $WORKDIR/values.yaml
echo "using values to $action of module $module: "
cat $WORKDIR/values.yaml
if [ $action == "crds" ]; then
# Allow custom CRD handling
declare -F ${module}-crds && ${module}-crds || _crds
elif [ $action == "apply" ]; then
# namespace must exist prior to apply
create_ns $namespace
# Optional pre hook
declare -F ${module}-pre && ${module}-pre
render
kubectl $action -f $WORKDIR/helm.yaml --server-side --force-conflicts && rc=$? || rc=$?
# Try again without server-side, review with 1.26, required for cert-manager during 1.25
[ $rc -ne 0 ] && kubectl $action -f $WORKDIR/helm.yaml && rc=$? || rc=$?
# Optional post hook
declare -F ${module}-post && ${module}-post
elif [ $action == "delete" ]; then
render