我正在尝试通过头盔中的yaml循环创建许多吊舱。如果我使用--debug --dry-run
运行,则输出符合我的期望,但是当我实际部署到集群时,只会显示循环的最后一次迭代。
一些Yaml:
{{ if .Values.componentTests }}
{{- range .Values.componentTests }}
apiVersion: v1
kind: Pod
metadata:
name: {{ . }}
labels:
app: {{ . }}
chart: {{ $.Chart.Name }}-{{ $.Chart.Version | replace "+" "_" }}
release: {{ $.Release.Name }}
heritage: {{ $.Release.Service }}
spec:
{{ toYaml $.Values.global.podSpec | indent 2 }}
restartPolicy: Never
containers:
- name: {{ . }}
ports:
- containerPort: 3000
image: 123456789012.dkr.ecr.eu-west-1.amazonaws.com/{{ . }}:latest
imagePullPolicy: Always
command: ["sleep"]
args: ["100d"]
resources:
requests:
memory: 2000Mi
cpu: 500m
{{- end }}
{{ end }}
当我运行helm upgrade --install --set componentTests="{a,b,c}" --debug --dry-run
我得到以下输出:
# Source: <path-to-file>.yaml
apiVersion: v1
kind: Pod
metadata:
name: a
labels:
app: a
chart: integrationtests-0.0.1
release: funny-ferret
heritage: Tiller
spec:
restartPolicy: Never
containers:
- name: content-tests
ports:
- containerPort: 3000
image: 123456789012.dkr.ecr.eu-west-1.amazonaws.com/a:latest
imagePullPolicy: Always
command: ["sleep"]
args: ["100d"]
resources:
requests:
memory: 2000Mi
cpu: 500m
apiVersion: v1
kind: Pod
metadata:
name: b
labels:
app: b
chart: integrationtests-0.0.1
release: funny-ferret
heritage: Tiller
spec:
restartPolicy: Never
containers:
- name: b
ports:
- containerPort: 3000
image: 123456789012.dkr.ecr.eu-west-1.amazonaws.com/b:latest
imagePullPolicy: Always
command: ["sleep"]
args: ["100d"]
resources:
requests:
memory: 2000Mi
cpu: 500m
apiVersion: v1
kind: Pod
metadata:
name: c
labels:
app: users-tests
chart: integrationtests-0.0.1
release: funny-ferret
heritage: Tiller
spec:
restartPolicy: Never
containers:
- name: c
ports:
- containerPort: 3000
image: 123456789012.dkr.ecr.eu-west-1.amazonaws.com/c:latest
imagePullPolicy: Always
command: ["sleep"]
args: ["100d"]
resources:
requests:
memory: 2000Mi
cpu: 500m
---
(由于敏感度/不相关性,某些部分已被编辑/删除)
在我看来,它确实满足了我的要求,即为a
创建一个广告连播,为b
创建一个广告连播,为c
创建一个广告连播。
但是,当实际将其安装到集群中时,我总是只得到与列表中最后一个元素相对应的pod。 (在这种情况下,c
)几乎就像它们相互覆盖一样,但是鉴于它们具有不同的名称,我认为它们不应该吗?即使运行--debug
而不运行--dry-run
,输出也告诉我应该有3个吊舱,但是使用kubectl get pods
只能看到一个吊舱。
如何使用Helm从列表中迭代创建吊舱?
答案 0 :(得分:3)
找到了!
显然,头盔使用---
作为pod / services / whatHaveYou规范之间的分隔符。
在单个图表中多次指定相同字段是有效的,它将对任何给定字段使用最后指定的值。为了避免覆盖值,而是创建多个Pod,只需在循环末尾添加分隔符即可:
{{ if .Values.componentTests }}
{{- range .Values.componentTests }}
apiVersion: v1
kind: Pod
metadata:
name: {{ . }}
labels:
app: {{ . }}
chart: {{ $.Chart.Name }}-{{ $.Chart.Version | replace "+" "_" }}
release: {{ $.Release.Name }}
heritage: {{ $.Release.Service }}
spec:
{{ toYaml $.Values.global.podSpec | indent 2 }}
restartPolicy: Never
containers:
- name: {{ . }}
ports:
- containerPort: 3000
image: 123456789012.dkr.ecr.eu-west-1.amazonaws.com/{{ . }}:latest
imagePullPolicy: Always
command: ["sleep"]
args: ["100d"]
resources:
requests:
memory: 2000Mi
cpu: 500m
---
{{- end }}
{{ end }}