update README in dashboard

Author: aki916f

dashboard/README.md

@@ -104,7 +104,15 @@ All commands below run **on the GPU node**.
 
 ```bash
 cd backend/
-./redis-7.2.7/src/redis-server --daemonize yes --bind 127.0.0.1
+export LC_ALL=C
+mkdir -p tmp/redis
+./redis-7.2.7/src/redis-server \
+  --daemonize yes \
+  --bind 127.0.0.1 \
+  --dir "$(pwd)/tmp/redis" \
+  --pidfile "$(pwd)/tmp/redis/redis.pid" \
+  --logfile "$(pwd)/tmp/redis/redis.log"
+./redis-7.2.7/src/redis-cli -h 127.0.0.1 ping   # → PONG
 
 . .venv/bin/activate
 export ONECOMP_DEVICE=cuda
@@ -294,6 +302,7 @@ See [troubleshooting in docs/setup-hpc.md](docs/setup-hpc.md#5-troubleshooting)
 
 | Symptom | Fix |
 |---|---|
+| Redis won't start (`Failed to configure LOCALE`) | `export LC_ALL=C` before `redis-server` ([#1b](docs/setup-hpc.md#1b-redis-exits-immediately--invalid-locale)) |
 | Redis `Error 97` / Celery reconnect failure | Use `127.0.0.1` in the Redis URL and `--bind` |
 | vLLM `/health` returns Squid 403 | `no_proxy` (set automatically in code) |
 | Deploy fails because `vllm_python` path is missing | Align `config` with the venv layout and restart the worker (#7) |

dashboard/docs/setup-hpc.md

@@ -155,11 +155,18 @@ Once a node is allocated (e.g. `gpu08`), run every command below
 
 ```bash
 cd backend/
-./redis-7.2.7/src/redis-server --daemonize yes --bind 127.0.0.1
+export LC_ALL=C
+mkdir -p tmp/redis
+./redis-7.2.7/src/redis-server \
+  --daemonize yes \
+  --bind 127.0.0.1 \
+  --dir "$(pwd)/tmp/redis" \
+  --pidfile "$(pwd)/tmp/redis/redis.pid" \
+  --logfile "$(pwd)/tmp/redis/redis.log"
+./redis-7.2.7/src/redis-cli -h 127.0.0.1 ping   # → PONG
 ```
 
-> **Important**: always pass `--bind 127.0.0.1` (see Troubleshooting below
-> for the reason).
+> **Important**: `--bind 127.0.0.1` ([#1](#1-redis-connection-error--address-family-not-supported-by-protocol-errno-97)) and `LC_ALL=C` ([#1b](#1b-redis-exits-immediately--invalid-locale)) on HPC nodes.
 
 ### 2.3 Start the worker
 
@@ -468,6 +475,17 @@ redis_url: str = "redis://127.0.0.1:6379/0"
 ./redis-7.2.7/src/redis-server --daemonize yes --bind 127.0.0.1
 ```
 
+### #1b: Redis exits immediately — invalid locale
+
+**Symptom**: `redis-cli ping` → `Connection refused`. Log:
+`Failed to configure LOCALE for invalid locale name.`
+
+**Cause**: Redis 7.x needs a valid locale at startup; HPC nodes often have
+`LANG` set to a locale that is not installed.
+
+**Fix**: `export LC_ALL=C`, then start Redis again (§2.2). If Celery already
+failed, restart the API and worker too.
+
 ### #2: vLLM health check is routed through the HTTP proxy
 
 **Symptom**: