argocd-repo-server fails with "/dev/shm: no space left on device"

[ASoldo]

Describe the bug
We are running Argo CD via the Operator in an OpenShift environment.

• Operator version: 0.13.0
• Argo CD version: v2.13.1

Despite configuring the argocd-repo-server to mount /dev/shm as an emptyDir with medium: Memory and a sizeLimit of 8Gi, we continue to receive the following error during application sync:

Failed to write manifest: write /dev/shm/XXXXXX: no space left on device

We confirmed:

• /dev/shm is mounted correctly with 8Gi capacity and shows 0% usage (df -h /dev/shm)
• Inodes are not exhausted (df -i /dev/shm)
• /tmp is mounted and available as an alternative write location (TMPDIR, HOME, etc., are all set correctly)
• The repo-server logs show no crash; sync fails silently due to this error

It appears the GitOps engine is still using /dev/shm even when TMPDIR and alternative volumes are configured.

---

To Reproduce

Steps to reproduce the behavior:

1. Install argocd-operator version 0.13.0 on OpenShift
2. Deploy an ArgoCD custom resource with the following relevant configuration:

spec:
  repo:
    env:
      - name: TMPDIR
        value: /tmp/argocd-temp
      - name: HOME
        value: /tmp/argocd-temp
      - name: GNUPGHOME
        value: /tmp/argocd-temp/.gnupg
      - name: XDG_CACHE_HOME
        value: /tmp/argocd-temp/.cache
      - name: XDG_RUNTIME_DIR
        value: /tmp/argocd-temp/.runtime
      - name: ARGOCD_EXEC_TIMEOUT
        value: "600"
      - name: ARGOCD_SERVER_REPO_SERVER_TIMEOUT_SECONDS
        value: "300"
    volumeMounts:
      - mountPath: /dev/shm
        name: shm-volume
      - mountPath: /tmp/argocd-temp
        name: temp-volume
    volumes:
      - name: shm-volume
        emptyDir:
          medium: Memory
          sizeLimit: 8Gi
      - name: temp-volume
        emptyDir:
          sizeLimit: 10Gi

Expected behavior
Sync a moderately large application using Helm or Kustomize
See the following error:
Failed to write manifest: write /dev/shm/XXXXXX: no space left on device

Not sure what to do here since this is the first time i encounter this issue.

[ASoldo]

After the manual restart of argocd cobtroller and Snippet i have provided here it works again.