chore(monitor-snapshot/release-8.1): update files from upstreams

monitor-snapshot/release-8.1/operator/Dockerfile

@@ -3,6 +3,7 @@ FROM busybox:1.37.0
 # Add user and group to support run it with non-root.
 ARG PINGCAP_UID=1000
 ARG PINGCAP_GID=2000
+ENV RELOADER_UID=${PINGCAP_UID}
 RUN addgroup -g ${PINGCAP_GID} pingcap && \
     adduser -u ${PINGCAP_UID} -G pingcap -h /home/pingcap -D pingcap
 

monitor-snapshot/release-8.1/operator/datasources/k8s-datasource.yaml

@@ -1,7 +1,7 @@
 apiVersion: 1
 datasources:
   - access: proxy
-    editable: true
+    editable: false
     name: k8s-cluster
     orgId: 1
     type: prometheus

monitor-snapshot/release-8.1/operator/init.sh

@@ -6,6 +6,123 @@ replace_template() {
     sed -i "s|$1|$replacement|g" -- "$3"
 }
 
+# Reject symlink ancestors before any rule deletion, copy or ownership changes.
+validate_rule_path() {
+    case "$1" in
+        /*) ;;
+        *) echo "Rules path must be absolute: $1" >&2; return 1;;
+    esac
+    case "/$1/" in
+        */../*) echo "Rules path must not contain ..: $1" >&2; return 1;;
+    esac
+    checked_path=$1
+    while [ "$checked_path" != / ]; do
+        if [ -L "$checked_path" ]; then
+            echo "Rules path must not contain symlinks: $1" >&2; return 1
+        fi
+        checked_path=${checked_path%/*}
+        [ -n "$checked_path" ] || checked_path=/
+    done
+}
+
+validate_rule_file() {
+    if [ -L "$1" ] || [ ! -f "$1" ] || [ -z "$(find "$1" -prune -type f -links 1 -print)" ]; then
+        echo "Rule must be a regular file with one link: $1" >&2
+        return 1
+    fi
+}
+
+# Run after copying/restoring rules on every Pod initialization. Do not chown /data.
+prepare_reloader_rules() {
+    reloader_uid=${RELOADER_UID:-1000}
+    initializer_uid=$(id -u) || return 1
+    for reloader_id in "$reloader_uid"; do
+        case "$reloader_id" in
+            ''|*[!0-9]*) echo "Reloader UID must be numeric" >&2; return 1;;
+        esac
+    done
+    reloader_version=$1
+    reloader_store=
+    set -- "$PROM_CONFIG_PATH/rules"
+    if [ -n "$PROM_PERSISTENT_DIR" ]; then
+        case "$reloader_version" in
+            ''|.|..|*/*) echo "Invalid persistent rules version" >&2; return 1;;
+        esac
+        reloader_store="$PROM_PERSISTENT_DIR/latest-rules/$reloader_version"
+        set -- "$@" "$PROM_PERSISTENT_DIR/latest-rules" "$reloader_store"
+    fi
+    for reloader_dir do
+        if [ -L "$reloader_dir" ] || { [ -e "$reloader_dir" ] && [ ! -d "$reloader_dir" ]; }; then
+            echo "Rules path must be a directory, not a symlink: $reloader_dir" >&2
+            return 1
+        fi
+        mkdir -p -- "$reloader_dir" || return 1
+        if [ "$initializer_uid" = 0 ]; then
+            chown "$reloader_uid" "$reloader_dir" || return 1
+        fi
+        if [ "$initializer_uid" = 0 ]; then
+            # Preserve the volume group and inherit it on atomic replacements.
+            chmod u+rwx,g+s,o-w "$reloader_dir" || return 1
+        fi
+    done
+    for reloader_dir in "$PROM_CONFIG_PATH/rules" "$reloader_store"; do
+        [ -n "$reloader_dir" ] || continue
+        for reloader_file in "$reloader_dir"/*.yml "$reloader_dir"/.*.yml "$reloader_dir"/.yml; do
+            [ -e "$reloader_file" ] || [ -L "$reloader_file" ] || continue
+            validate_rule_file "$reloader_file" || return 1
+            if [ "$initializer_uid" = 0 ]; then
+                chown "$reloader_uid" "$reloader_file" || return 1
+            fi
+            if [ "$initializer_uid" = 0 ]; then
+                chmod u+rw,go-w,a-x "$reloader_file" || return 1
+            fi
+        done
+    done
+}
+
+# Restore current-version customizations automatically, as before. Validate the
+# filesystem entries rather than treating all historical user edits as untrusted.
+ensure_rules_directory() {
+    rules_dir="$PROM_CONFIG_PATH/rules"
+    if [ -L "$rules_dir" ] || { [ -e "$rules_dir" ] && [ ! -d "$rules_dir" ]; }; then
+        echo "Rules path must be a directory" >&2; return 1
+    fi
+    mkdir -p -- "$rules_dir" || return 1
+}
+
+reset_rules() {
+    ensure_rules_directory || return 1
+    for entry in "$rules_dir"/* "$rules_dir"/.[!.]* "$rules_dir"/..?*; do
+        [ -e "$entry" ] || [ -L "$entry" ] || continue
+        rm -rf -- "$entry" || return 1
+    done
+}
+
+restore_rules() {
+    [ -n "$PROM_PERSISTENT_DIR" ] || return 0
+    case "$1" in
+        ''|.|..|*/*) echo "Invalid persisted rules version" >&2; return 1;;
+    esac
+    saved_root="$PROM_PERSISTENT_DIR/latest-rules"
+    saved_version="$saved_root/$1"
+    if [ -L "$PROM_PERSISTENT_DIR" ] || [ -L "$saved_root" ] || [ -L "$saved_version" ]; then
+        echo "Persisted rule directories must not be symbolic links" >&2; return 1
+    fi
+    if [ -e "$saved_version" ] && [ ! -d "$saved_version" ]; then
+        echo "Persisted rules path must be a directory" >&2; return 1
+    fi
+    [ -d "$saved_version" ] || return 0
+    for rule in "$saved_version"/*.rules.yml "$saved_version"/.rules.yml "$saved_version"/.*.rules.yml; do
+        [ -e "$rule" ] || [ -L "$rule" ] || continue
+        validate_rule_file "$rule" || return 1
+        destination="$PROM_CONFIG_PATH/rules/${rule##*/}"
+        if [ -e "$destination" ] || [ -L "$destination" ]; then
+            validate_rule_file "$destination" || return 1
+        fi
+        cp -f -- "$rule" "$PROM_CONFIG_PATH/rules/${rule##*/}" || return 1
+    done
+}
+
 # Multiline replacements would become new sed commands or malformed configuration.
 for value in "$DM_CLUSTER_NAME" "$TIDB_CLUSTER_NAME" "$TIDB_CLUSTER_NAMESPACE" \
     "$GF_DM_PROMETHEUS_URL" "$GF_K8S_PROMETHEUS_URL" "$GF_TIDB_PROMETHEUS_URL"; do
@@ -19,6 +136,11 @@ if [ -z "$GF_PROVISIONING_PATH" ] || [ -z "$PROM_CONFIG_PATH" ]; then
     exit 1
 fi
 
+validate_rule_path "$PROM_CONFIG_PATH/rules" || exit 1
+if [ -n "$PROM_PERSISTENT_DIR" ]; then
+    validate_rule_path "$PROM_PERSISTENT_DIR/latest-rules" || exit 1
+fi
+
 if [ -n "$DM_CLUSTER_NAME" ]; then
     echo "running for DM"
     if [ ! -d "$GF_PROVISIONING_PATH/dashboards" ]; then
@@ -33,9 +155,11 @@ if [ -n "$DM_CLUSTER_NAME" ]; then
     cp -f -- /tmp/DM-Monitor-Professional.json "$GF_PROVISIONING_PATH/dashboards"
     replace_template 'Test-Cluster-DM' "${DM_CLUSTER_NAME}-DM-Professional" "$GF_PROVISIONING_PATH/dashboards"/DM-Monitor-Professional.json
 
-    # Rules
-    if [ ! -d "$PROM_CONFIG_PATH/rules" ]; then
-        mkdir -p -- "$PROM_CONFIG_PATH/rules"
+    # Operator runs DM after TiDB against the same directory. Keep TiDB rules.
+    ensure_rules_directory || exit 1
+    dm_rule="$PROM_CONFIG_PATH/rules/dm_worker.rules.yml"
+    if [ -e "$dm_rule" ] || [ -L "$dm_rule" ]; then
+        validate_rule_file "$dm_rule" || exit 1
     fi
 
     echo $META_TYPE
@@ -47,12 +171,7 @@ if [ -n "$DM_CLUSTER_NAME" ]; then
     fi
     replace_template 'ENV_LABELS_ENV' "${DM_CLUSTER_NAME}" "$PROM_CONFIG_PATH/rules/dm_worker.rules.yml" || exit 1
 
-    # Copy Persistent rules to override raw files
-    if [ -n "$PROM_PERSISTENT_DIR" ]; then
-        if [ -d "$PROM_PERSISTENT_DIR/latest-rules/${DM_VERSION##*/}" ]; then
-            cp -f -- "$PROM_PERSISTENT_DIR/latest-rules/${DM_VERSION##*/}"/dm_worker.rules.yml "$PROM_CONFIG_PATH/rules"
-        fi
-    fi
+    restore_rules "${DM_VERSION##*/}" || exit 1
 
     # Data sources
     if [ -n "$GF_DATASOURCE_PATH" ]; then
@@ -61,6 +180,7 @@ if [ -n "$DM_CLUSTER_NAME" ]; then
         fi
         cp -f -- /tmp/dm-cluster-datasource.yaml "$GF_DATASOURCE_PATH/"
     fi
+    prepare_reloader_rules "${DM_VERSION##*/}" || exit 1
     echo "running for DM done"
     exit
 fi
@@ -161,29 +281,22 @@ for f in "$GF_PROVISIONING_PATH/dashboards"/*.json; do
 done
 
 # Rules
-if [ ! -d "$PROM_CONFIG_PATH/rules" ]; then
-    mkdir -p -- "$PROM_CONFIG_PATH/rules"
-else
-    rm -rf -- "$PROM_CONFIG_PATH/rules"/*
-fi
+reset_rules || exit 1
 echo $META_TYPE
 echo $META_INSTANCE
 echo $META_VALUE
-cp -- /tmp/*.rules.yml "$PROM_CONFIG_PATH/rules"
+cp -- /tmp/*.rules.yml "$PROM_CONFIG_PATH/rules" || exit 1
 for file in "$PROM_CONFIG_PATH/rules"/*; do
     sed -i 's/ENV_LABELS_ENV/Cluster/g' "$file"
     sed -i 's%job=%component=%g' "$file"
     sed -i -e 's%\(by\s(\)job\(,.*)\)%\1component\2%g' -e 's%\(by\s(.*\),job,\(.*)\)%\1,component,\2%g' -e 's%\(by\s(.*,\)job)%\1component)%g' -e 's%\(by\s(\)job)%\1component)%g' "$file"
 done
 
-# Copy Persistent rules to override raw files
-if [ -n "$PROM_PERSISTENT_DIR" ]; then
-    if [ -d "$PROM_PERSISTENT_DIR/latest-rules/${TIDB_VERSION##*/}" ]; then
-        cp -f -- "$PROM_PERSISTENT_DIR/latest-rules/${TIDB_VERSION##*/}"/*.rules.yml "$PROM_CONFIG_PATH/rules"
-    fi
-fi
+restore_rules "${TIDB_VERSION##*/}" || exit 1
 
 # Datasources
+prepare_reloader_rules "${TIDB_VERSION##*/}" || exit 1
+
 if [ -n "$GF_DATASOURCE_PATH" ]; then
     if [ -n "$GF_K8S_PROMETHEUS_URL" ]; then
         replace_template 'http://prometheus-k8s.monitoring.svc:9090' "${GF_K8S_PROMETHEUS_URL}" /tmp/k8s-datasource.yaml