Support adjusting the number of file description

Signed-off-by: 22fortisetliber <thomas.vu1198@gmail.com>

Author: 22fortisetliber

cmd/cortex/Dockerfile

@@ -4,8 +4,10 @@ ARG TARGETARCH
 RUN        apk add --no-cache ca-certificates
 COPY       migrations /migrations/
 COPY       cortex-$TARGETARCH /bin/cortex
+COPY       run.sh /bin/run.sh
+RUN        chmod +x /bin/run.sh
 EXPOSE     80
-ENTRYPOINT [ "/bin/cortex" ]
+ENTRYPOINT [ "/bin/run.sh" ]
 
 ARG revision
 LABEL org.opencontainers.image.title="cortex" \

cmd/cortex/run.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+if [ -n "${CORTEX_ULIMIT_NOFILES:-}" ]; then
+    current_limit=$(ulimit -n)
+    if [ "$current_limit" != "unlimited" ]; then
+        if [ $CORTEX_ULIMIT_NOFILES -gt $current_limit ]; then
+            echo "Setting file description limit to $CORTEX_ULIMIT_NOFILES"
+            ulimit -n $CORTEX_ULIMIT_NOFILES
+        fi
+    fi
+fi
+ulimit -a
+exec /bin/cortex "$@"