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From 6831ccb71a7b19c6e5cb970026cbffff39928e2b Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ville=20Skytt=C3=A4?= <ville.skytta@iki.fi>
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Date: Sun, 1 Dec 2019 08:21:32 +0200
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Subject: [PATCH 24/25] docker: Lookup from /proc/self/cgroup too
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Refs https://github.com/moby/moby/issues/18355
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(cherry picked from commit 57f0c3cc6a7e631f644d67f05b002c6004bb6601)
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---
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tests/docker/Makefile.am | 1 +
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tests/docker/proc/self/cgroup | 13 +++++++++++++
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virt-what.in | 3 ++-
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3 files changed, 16 insertions(+), 1 deletion(-)
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create mode 100644 tests/docker/proc/self/cgroup
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diff --git a/tests/docker/Makefile.am b/tests/docker/Makefile.am
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index e2a95d8..401f372 100644
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--- a/tests/docker/Makefile.am
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+++ b/tests/docker/Makefile.am
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@@ -24,6 +24,7 @@ EXTRA_DIST = \
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.dockerenv \
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.dockerinit \
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proc/cpuinfo \
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+ proc/self/cgroup \
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proc/self/status \
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sbin/dmidecode \
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sbin/uname \
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diff --git a/tests/docker/proc/self/cgroup b/tests/docker/proc/self/cgroup
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new file mode 100644
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index 0000000..5547637
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--- /dev/null
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+++ b/tests/docker/proc/self/cgroup
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@@ -0,0 +1,13 @@
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+12:devices:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+11:blkio:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+10:perf_event:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+9:pids:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+8:cpuset:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+7:rdma:/
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+6:hugetlb:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+5:net_cls,net_prio:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+4:memory:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+3:freezer:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+2:cpu,cpuacct:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+1:name=systemd:/docker/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae
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+0::/system.slice/containerd.service
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diff --git a/virt-what.in b/virt-what.in
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index 900a05d..6330fd0 100644
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--- a/virt-what.in
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+++ b/virt-what.in
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@@ -349,7 +349,8 @@ if ! "$skip_lkvm"; then
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fi
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# Check for Docker.
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-if [ -f "${root}/.dockerenv" ] || [ -f "${root}/.dockerinit" ]; then
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+if [ -f "${root}/.dockerenv" ] || [ -f "${root}/.dockerinit" ] || \
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+ grep -qF /docker/ "${root}/proc/self/cgroup" 2>/dev/null; then
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echo docker
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fi
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--
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2.18.4
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