add new test

[distro-setup] / check-crypttab

diff --git a/check-crypttab b/check-crypttab
new file mode 100755 (executable)
index 0000000..2bbbdea
--- /dev/null
+++ b/check-crypttab
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# I somehow ended up with an empty crypttab, and had to rescue my
+# system. So, lets check for some basic validity.
+
+if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
+shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
+set -eE -o pipefail
+trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
+
+debug=false
+if [[ $1 ]]; then
+  debug=true
+fi
+d() {
+  if $debug; then
+    printf "%s\n" "$*"
+  fi
+}
+
+metric_dir=/var/lib/prometheus/node-exporter
+mnt="$(findmnt -fn -o SOURCE /)"
+case $mnt in
+  /dev/mapper/crypt_dev_*)
+    tmp=${mnt#/dev/mapper/}
+    dev=${tmp%%\[*}
+    if ! grep -qF $dev /etc/crypttab; then
+      d $dev
+      if [[ -e $metric_dir  ]]; then
+        echo "crypttab_check 1" > $metric_dir/crypttab_check.prom
+        exit 0
+      fi
+    fi
+    ;;
+esac
+if [[ -e $metric_dir  ]]; then
+  echo "crypttab_check 0" > $metric_dir/crypttab_check.prom
+fi