deployment throwing error for init container only when I add a second regular container to my deployment - kubernetes

Question

Hi There I am currently trying to deploy sonarqube 7.8-community in GKE using a DB cloudsql instance.
This requires 2 containers ( one for sonarqube and the other for the cloudproxy in order to connect to the DB)
Sonarqube container, however, also requires an init container to give it some special memory requirments.
When I create the deployment with just the sonarqube image and the init container it works fine but this wont be of any use as I need the cloudsql proxy container to connect to my external db. When I add this container though the deployment suddenly errors with the below
deirdrerodgers#cloudshell:~ (meta-gear-306013)$ kubectl create -f initsonar.yaml
The Deployment "sonardeploy" is invalid:spec.template.spec.initContainers[0].volumeMounts[0].name: Not found: "init-sysctl"
This is my complete yaml file with the init container and the other two containers. I wonder is the issue because it doesnt know which container to apply the init container to?
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: sonardeploy
name: sonardeploy
namespace: sonar
spec:
replicas: 1
selector:
matchLabels:
app: sonardeploy
strategy: {}
template:
metadata:
labels:
app: sonardeploy
spec:
initContainers:
- name: init-sysctl
image: busybox:1.32
imagePullPolicy: IfNotPresent
securityContext:
privileged: true
resources:
{}
command: ["sh",
"-e",
"/tmp/scripts/init_sysctl.sh"]
volumeMounts:
- name: init-sysctl
mountPath: /tmp/scripts/
volumes:
- name: init-sysctl
configMap:
name: sonarqube-sonarqube-init-sysctl
items:
- key: init_sysctl.sh
path: init_sysctl.sh
spec:
containers:
- image: sonarqube:7.8-community
name: sonarqube
env:
- name: SONARQUBE_JDBC_USERNAME
valueFrom:
secretKeyRef:
name: sonarsecret
key: username
- name: SONARQUBE_JDBC_PASSWORD
valueFrom:
secretKeyRef:
name: sonarsecret
key: password
- name: SONARQUBE_JDBC_URL
value: jdbc:postgresql://localhost:5432/sonar
ports:
- containerPort: 9000
name: sonarqube
- name: cloudsql-proxy
image: gcr.io/cloudsql-docker/gce-proxy:1.17
command: ["/cloud_sql_proxy",
"-instances=meta-gear-306013:us-central1:sonardb=tcp:5432",
"-credential_file=/secrets/service_account.json"]
securityContext:
runAsNonRoot: true
volumeMounts:
- name: cloudsql-instance-credentials-volume
mountPath: /secrets/
readOnly: true
volumes:
- name: cloudsql-instance-credentials-volume
secret:
secretName: cloudsql-instance-credentials

Answer 1

Your yaml file is incorrect. You have two spec: blocks. It should be only one. You need to combine it together. Under spec block should be initContainers block, then containers and finally volumes block. Look at the correct yaml file below:
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: sonardeploy
name: sonardeploy
namespace: sonar
spec:
replicas: 1
selector:
matchLabels:
app: sonardeploy
strategy: {}
template:
metadata:
labels:
app: sonardeploy
spec:
initContainers:
- name: init-sysctl
image: busybox:1.32
imagePullPolicy: IfNotPresent
securityContext:
privileged: true
resources:
{}
command: ["sh",
"-e",
"/tmp/scripts/init_sysctl.sh"]
volumeMounts:
- name: init-sysctl
mountPath: /tmp/scripts/
containers:
- image: sonarqube:7.8-community
name: sonarqube
env:
- name: SONARQUBE_JDBC_USERNAME
valueFrom:
secretKeyRef:
name: sonarsecret
key: username
- name: SONARQUBE_JDBC_PASSWORD
valueFrom:
secretKeyRef:
name: sonarsecret
key: password
- name: SONARQUBE_JDBC_URL
value: jdbc:postgresql://localhost:5432/sonar
ports:
- containerPort: 9000
name: sonarqube
- name: cloudsql-proxy
image: gcr.io/cloudsql-docker/gce-proxy:1.17
command: ["/cloud_sql_proxy",
"-instances=meta-gear-306013:us-central1:sonardb=tcp:5432",
"-credential_file=/secrets/service_account.json"]
securityContext:
runAsNonRoot: true
volumeMounts:
- name: cloudsql-instance-credentials-volume
mountPath: /secrets/
readOnly: true
volumes:
- name: cloudsql-instance-credentials-volume
secret:
secretName: cloudsql-instance-credentials
- name: init-sysctl
configMap:
name: sonarqube-sonarqube-init-sysctl
items:
- key: init_sysctl.sh
path: init_sysctl.sh