Reapply "Remove symbols statefulset" (#676) (#677)

### Checklist

- [ ] Follow the [manual testing
process](https://github.com/sourcegraph/deploy-sourcegraph-helm/blob/main/TEST.md)
- [x] Update
[changelog](https://github.com/sourcegraph/deploy-sourcegraph-helm/blob/main/charts/sourcegraph/CHANGELOG.md)
- [x] Update [Kubernetes update
doc](https://docs.sourcegraph.com/admin/updates/kubernetes)

Test plan: Will be picked up by internal cloud instances tracking main.
We'll watch the rollout in ArgoCD.

Author: eseliger

charts/sourcegraph/CHANGELOG.md

@@ -11,6 +11,7 @@ Use `**BREAKING**:` to denote a breaking change
 - Fix Pod Disruption Budget for sourcegraph-frontend
 - Added a startup probe to the gitserver statefulset to give it time to run the on-disk migration from repo names to repo IDs
 - The repo-updater service is no longer needed and has been removed from the chart.
+- The symbols service is no longer needed and has been removed from the chart. Consider merging env vars and resource overrides given to symbols into searcher before upgrading.
 
 ## 5.10.0
 

charts/sourcegraph/README.md

@@ -320,16 +320,6 @@ In addition to the documented values, all services also support the following va
 | storageClass.parameters | object | `{}` | Extra parameters of storageClass, consult your cloud provider persistent storage documentation |
 | storageClass.provisioner | string | `"kubernetes.io/gce-pd"` | Name of the storageClass provisioner, learn more from the [Kubernetes documentation](https://kubernetes.io/docs/concepts/storage/storage-classes/#provisioner) and consult your cloud provider persistent storage documentation |
 | storageClass.type | string | `"pd-ssd"` | Value of `type` key in storageClass `parameters`, consult your cloud provider persistent storage documentation |
-| symbols.containerSecurityContext | object | `{"allowPrivilegeEscalation":false,"readOnlyRootFilesystem":true,"runAsGroup":101,"runAsUser":100}` | Security context for the `symbols` container, learn more from the [Kubernetes documentation](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-container) |
-| symbols.image.defaultTag | string | `"6.0.0@sha256:7f91048d1966add54b199755c77a5c3ca84b7f57bb5d2ffb65113da7f100b051"` | Docker image tag for the `symbols` image |
-| symbols.image.name | string | `"symbols"` | Docker image name for the `symbols` image |
-| symbols.name | string | `"symbols"` | Name used by resources. Does not affect service names or PVCs. |
-| symbols.podSecurityContext | object | `{"fsGroup":101,"fsGroupChangePolicy":"OnRootMismatch","runAsUser":100}` | Security context for the `symbols` pod, learn more from the [Kubernetes documentation](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-pod) |
-| symbols.replicaCount | int | `1` | Number of `symbols` pod |
-| symbols.resources | object | `{"limits":{"cpu":"2","memory":"2G"},"requests":{"cpu":"500m","memory":"500M"}}` | Resource requests & limits for the `symbols` container, learn more from the [Kubernetes documentation](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/) |
-| symbols.serviceAccount.create | bool | `false` | Enable creation of ServiceAccount for `symbols` |
-| symbols.serviceAccount.name | string | `""` | Name of the ServiceAccount to be created or an existing ServiceAccount |
-| symbols.storageSize | string | `"12Gi"` | Size of the PVC for symbols pods to store cache data |
 | syntacticCodeIntel.containerSecurityContext | object | `{"allowPrivilegeEscalation":false,"readOnlyRootFilesystem":true,"runAsGroup":101,"runAsUser":100}` | Security context for the `syntactic-code-intel-worker` container, learn more from the [Kubernetes documentation](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-container) |
 | syntacticCodeIntel.enabled | bool | `false` |  |
 | syntacticCodeIntel.image.defaultTag | string | `"6.0.0@sha256:50bdeb38b196f0fc21404969016bf8263f78144292e905867e93480f66c8251c"` | Docker image tag for the `syntactic-code-intel-worker` image |

charts/sourcegraph/examples/advanced-scheduling/override.yaml

@@ -93,19 +93,6 @@ searcher:
                 app: searcher
           weight: 100
 
-symbols:
-  replicaCount: 3
-  affinity:
-    podAntiAffinity:
-      preferredDuringSchedulingIgnoredDuringExecution:
-        - podAffinityTerm:
-            topologyKey: kubernetes.io/hostname
-            labelSelector:
-              matchLabels:
-                <<: *commonSelectorLabels
-                app: symbols
-          weight: 100
-
 worker:
   replicaCount: 3
   affinity:

charts/sourcegraph/examples/basic/override.yaml

@@ -64,14 +64,3 @@ searcher:
     requests:
       cpu: 500m
       memory: 1G
-
-symbols:
-  resources:
-    limits:
-      cpu: "4"
-      memory: 4G
-      ephemeral-storage: "10G"
-    requests:
-      cpu: "1"
-      memory: 1G
-      ephemeral-storage: "10G"

charts/sourcegraph/examples/common-modifications/override.yaml

@@ -183,19 +183,6 @@ searcher:
       ephemeral-storage: 25G
       memory: 500M
 
-
-symbols:
-  replicaCount: 1
-  resources:
-    limits:
-      cpu: "2"
-      ephemeral-storage: 12G
-      memory: 2G
-    requests:
-      cpu: 500m
-      ephemeral-storage: 10G
-      memory: 500M
-
 syntectServer:
   replicaCount: 1
   resources:

charts/sourcegraph/examples/gcp/override.yaml

@@ -74,11 +74,6 @@ searcher:
     SRC_LOG_FORMAT: 
       value: json_gcp
 
-symbols:
-  env:
-    SRC_LOG_FORMAT: 
-      value: json_gcp
-
 syntectServer:
   env:
     SRC_LOG_FORMAT: 

charts/sourcegraph/templates/searcher/searcher.StatefulSet.yaml

@@ -56,13 +56,22 @@ spec:
           {{- $item | toYaml | nindent 10 }}
         {{- end }}
         - name: SEARCHER_CACHE_SIZE_MB
-          # Set the cache size to ~90% of the PVC size
+          # Set the cache size to ~45% of the PVC size
           {{- if .Values.searcher.storageSize }}
-          value: {{ trimSuffix "Gi" .Values.searcher.storageSize | mul 900 | quote }}
+          value: {{ trimSuffix "Gi" .Values.searcher.storageSize | mul 450 | quote }}
           {{- else }}
-          # This value is ~90% of the default value for
+          # This value is ~45% of the default value for
           # storageSize in the VolumeClaimTemplate below
-          value: "23400"  
+          value: "11700"
+          {{- end }}
+        - name: SYMBOLS_CACHE_SIZE_MB
+          # Set the cache size to ~45% of the PVC size
+          {{- if .Values.searcher.storageSize }}
+          value: {{ trimSuffix "Gi" .Values.searcher.storageSize | mul 450 | quote }}
+          {{- else }}
+          # This value is ~45% of the default value for
+          # storageSize in the VolumeClaimTemplate below
+          value: "11700"
           {{- end }}
         - name: POD_NAME
           valueFrom: