initial release

1 files changed, 70 insertions, 0 deletions

diff --git a/ebpf_on_container.sh b/ebpf_on_container.sh
new file mode 100755
index 0000000..e65c000
--- /dev/null
+++ b/ebpf_on_container.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+
+#    Copyright (C) 2023  Pasha <pasha@bell01.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+show_version() {
+    echo "0.1a"
+    exit 1
+}
+
+show_usage() {
+    echo "Usage: $0 bpf_program_path container_id"
+    echo "example: $0 /usr/sbin/execsnoop-bpfcc \$(docker inspect --format=\"{{.Id}}\" 119cb41a9e09)"
+
+    echo "         $0 /usr/sbin/execsnoop-bpfcc \$(kubectl get pods -o jsonpath='{range .items[*].status.containerStatuses[*]}{.containerID}{\"\n\"}{end}' --field-selector metadata.name=test-deployment-7f456874f4-mxjg4 | cut -b 10-)"
+    exit 1
+}
+
+if [[ "$1" == "-v" ]]; then
+   show_version
+fi
+
+if [ -z "$1" ] || [ -z "$2" ]; then
+   show_usage
+fi
+
+bpf_prog_path=$1
+containerid=$2
+
+echo "creating bpf map"
+
+BPF_FILE=/sys/fs/bpf/$containerid
+if [ -f "$BPF_FILE" ]; then
+    echo "error bpf map exists."
+    echo "please unmap or remove \"$BPF_FILE\" and try again."
+    exit 1
+fi
+
+echo $BPF_FILE
+
+/usr/sbin/bpftool map create $BPF_FILE type hash key 8 value 8 entries 128 name cgroupset flags 0
+
+cgroupid=$(containercgroup id $containerid)
+if [ -z "$cgroupid" ]
+then
+    echo "invalid container id"
+    echo "removing bpf map"
+    rm $BPF_FILE
+    exit 1
+fi
+
+echo "cgroupid: $cgroupid"
+/usr/sbin/bpftool map update pinned $BPF_FILE key hex $cgroupid value hex 00 00 00 00 00 00 00 00 any
+
+$bpf_prog_path --cgroup $BPF_FILE
+
+echo "removing bpf map"
+rm $BPF_FILE