unmarshalerDecoder: quantities must match the regular expression - kubernetes

Question

When I am installing CoreDNS using this command ,by the way,the OS version is: CentOS 7.6 and Kubernetes version is: v1.15.2:
kubectl create -f coredns.yaml
The output is:
[root#ops001 coredns]# kubectl create -f coredns.yaml
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
service/kube-dns created
Error from server (BadRequest): error when creating "coredns.yaml": Deployment in version "v1" cannot be handled as a Deployment: v1.Deployment.Spec: v1.DeploymentSpec.Template: v1.PodTemplateSpec.Spec: v1.PodSpec.Containers: []v1.Container: v1.Container.Resources: v1.ResourceRequirements.Requests: Limits: unmarshalerDecoder: quantities must match the regular expression '^([+-]?[0-9.]+)([eEinumkKMGTP]*[-+]?[0-9]*)$', error found in #10 byte of ...|__LIMIT__"},"request|..., bigger context ...|limits":{"memory":"__PILLAR__DNS__MEMORY__LIMIT__"},"requests":{"cpu":"100m","memory":"70Mi"}},"secu|...
this is my coredns.yaml:
# __MACHINE_GENERATED_WARNING__
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: Reconcile
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: EnsureExists
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
labels:
addonmanager.kubernetes.io/mode: EnsureExists
data:
Corefile: |
.:53 {
errors
health
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
upstream
fallthrough in-addr.arpa ip6.arpa
ttl 30
}
prometheus :9153
forward . /etc/resolv.conf
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. In order to make Addon Manager do not reconcile this replicas parameter.
# 2. Default is 1.
# 3. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
annotations:
seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
nodeSelector:
beta.kubernetes.io/os: linux
containers:
- name: coredns
image: gcr.azk8s.cn/google-containers/coredns:1.3.1
imagePullPolicy: IfNotPresent
resources:
limits:
memory: __PILLAR__DNS__MEMORY__LIMIT__
requests:
cpu: 100m
memory: 70Mi
args: [ "-conf", "/etc/coredns/Corefile" ]
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
readOnly: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
readinessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
---
apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
annotations:
prometheus.io/port: "9153"
prometheus.io/scrape: "true"
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.254.0.2
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
am I missing something?

Answer 1

From this error message
Error from server (BadRequest):
error when creating "coredns.yaml":
Deployment in version "v1" cannot be handled as a Deployment:
v1.Deployment.Spec:
v1.DeploymentSpec.Template: v
1.PodTemplateSpec.Spec:
v1.PodSpec.Containers: []v1.Container:
v1.Container.Resources:
v1.ResourceRequirements.Requests: Limits: unmarshalerDecoder: quantities must match the regular expression '^([+-]?[0-9.]+)([eEinumkKMGTP]*[-+]?[0-9]*)$', error found in #10 byte of ...|__LIMIT__"},"request|..., bigger context ...|limits":{"memory":"__PILLAR__DNS__MEMORY__LIMIT__"},"requests":{"cpu":"100m","memory":"70Mi"}},"secu|...
This part is root-cause.
unmarshalerDecoder:
quantities must match the regular expression
'^([+-]?[0-9.]+)([eEinumkKMGTP]*[-+]?[0-9]*)$'
What quantities are there?
Seems like
v1.ResourceRequirements.Requests: Limits:
So please, change Requests.Limits from __PILLAR__DNS__MEMORY__LIMIT__ to other value.

Answer 2

Please refer to coredns/deployment in your deployments there are fields like limits {"memory":"__PILLAR__DNS__MEMORY__LIMIT__".
As described in the docs you can use own script to override some parameters while switching from kube-dns to COREDNS there is deploy script.
Installing CoreDNS
In Kubernetes version 1.13 and later the CoreDNS feature gate is removed and CoreDNS is used by default.
So you can use your original installation and see default values in config map and deployment.
kubectl get configmap coredns -n kube-system -o yaml
Hope this help.