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我有一个 solr 容器，需要使用参数启动，无论是 master 还是 slave。我正在尝试将 env var 放入容器中，以便 init 脚本可以读取它，并以 master 或 slave 启动。

        env:
          - name: ROLE
            value: "master"

容器启动，当我进入容器时，我可以看到 ROLE 变量已设置，但似乎初始化脚本没有选择它。

env var 是在 init 脚本运行之前还是之后设置的？如果是这样，我如何注入这个 var 以便脚本可以使用它？我宁愿不为这个小变量做 ConfigMap 或 Secret。

此容器已通过 Migrate for Anthos 从 EC2 转换为容器映像，并在 Anthos 集群中运行。

Dockerfile 示例，可重现

# Please refer to the documentation:
# https://cloud.google.com/migrate/anthos/docs/dockerfile-reference

FROM anthos-migrate.gcr.io/v2k-run-embedded:v1.8.1 as migrate-for-anthos-runtime

# Image containing data captured from the source VM
FROM mi5key/testing:v0.0.4

COPY --chown=root:root env-vars /etc/rc.d/init.d/env-vars
RUN /sbin/chkconfig env-vars on

COPY --from=migrate-for-anthos-runtime / /

ADD blocklist.yaml /.m4a/blocklist.yaml

ADD logs.yaml /code/config/logs/logsArtifact.yaml

# Migrate for Anthos image includes entrypoint
ENTRYPOINT [ "/.v2k.go" ]

部署规范.yaml

# Stateless application specification
# The Deployment creates a single replicated Pod, indicated by the 'replicas' field
apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: env-vars-test
    migrate-for-anthos-optimization: "true"
    migrate-for-anthos-version: v1.8.1
  name: env-vars-test
spec:
  replicas: 1
  selector:
    matchLabels:
      app: env-vars-test
      migrate-for-anthos-optimization: "true"
      migrate-for-anthos-version: v1.8.1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: env-vars-test
        migrate-for-anthos-optimization: "true"
        migrate-for-anthos-version: v1.8.1
    spec:
      containers:
      - image: docker.io/mi5key/testing:v0.0.4
        imagePullPolicy: IfNotPresent
        name: env-vars-test
        readinessProbe:
          exec:
            command:
            - /code/ready.sh
        resources:
          limits:
            memory: "1Gi"
            cpu: "1"
        env:
          - name: ROLE
            value: "single"
        securityContext:
          privileged: true
        volumeMounts:
        - mountPath: /sys/fs/cgroup
          name: cgroups
      volumes:
      - hostPath:
          path: /sys/fs/cgroup
          type: Directory
        name: cgroups
status: {}
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