How to deploy logstash with persistent volume on kubernetes? - kubernetes

Question

Using GKE to deploy logstash by statefulset kind with pvc. Also need to install an output plugin.
When don't use while true; do sleep 1000; done; in container's command args, it can't deploy with pvc successfully.
The pod will cause CrashLoopBackOff error.
Normal Created 13s (x2 over 14s) kubelet Created container logstash
Normal Started 13s (x2 over 13s) kubelet Started container logstash
Warning BackOff 11s (x2 over 12s) kubelet Back-off restarting failed container
From here I found it can try to add sleep. So the statefulset with pvc can deploy successfully.
But when check its logs will find:
/bin/sh: bin/logstash-plugin: No such file or directory
/bin/sh: bin/logstash: No such file or directory
How to do it in a good way to start container to install an logstash output plugin?
The whole manifest file:
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: logstash-to-gcs
namespace: logging
spec:
serviceName: "logstash"
selector:
matchLabels:
app: logstash
updateStrategy:
type: RollingUpdate
replicas: 3
template:
metadata:
labels:
app: logstash
spec:
containers:
- name: logstash
image: docker.elastic.co/logstash/logstash:7.10.0
resources:
limits:
memory: 2Gi
ports:
- containerPort: 5044
volumeMounts:
- name: config-volume
mountPath: /usr/share/logstash/config
- name: logstash-pipeline-volume
mountPath: /usr/share/logstash/pipeline
- name: logstash-data
mountPath: /usr/share/logstash
command: ["/bin/sh","-c"]
args:
- bin/logstash-plugin install logstash-output-google_cloud_storage;
bin/logstash -f /usr/share/logstash/pipeline/logstash.conf;
while true; do sleep 1000; done;
volumes:
- name: config-volume
configMap:
name: logstash-configmap
items:
- key: logstash.yml
path: logstash.yml
- name: logstash-pipeline-volume
configMap:
name: logstash-configmap
items:
- key: logstash.conf
path: logstash.conf
volumeClaimTemplates:
- metadata:
name: logstash-data
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi

Answer 1

For my containers I have a script I have ran on Container Deployments and it works to install the plugins and then run logstash.
Post Arg> sh /usr/share/logstash/config/plugins.sh
#!binbash
echo running post install scripts for plugins..;
logstash-plugin install logstash-filter-sentimentalizer
logstash-plugin install logstash-input-mysql
echo finished post install scripts for plugins..;
sleep 1
exec logstash