travis: Fix openSUSE Tumbleweed

openSUSE Tumbleweed build fails due broken permission detection due
faccessat2() incompatibility in libseccomp/runc used in old docker with
old kernel on Ubuntu Focal on hosts in Travis CI together with guests
with the newest glibc 2.33.

Fixing Tumbleweed required switch to podman and downloading newest runc
release (v1.0.0-rc93) which contains the fix [1], because proposed glibc
fix [2] aren't going to merged to upstream [3] nor to Tumbleweed
downstream glibc [4].

Sooner or later it will be required for more distros (Fedora, Debian
Ubuntu), but don't waste build time until required.

[1] https://github.com/opencontainers/runc/pull/2750
[2] https://sourceware.org/pipermail/libc-alpha/2020-November/119955.html
[3] https://sourceware.org/pipermail/libc-alpha/2020-November/119978.html
[4] https://bugzilla.opensuse.org/1182451

Signed-off-by: Petr Vorel <pvorel@suse.cz>
[zohar@linux.ibm.com: actually remove sudo, as per Changelog]
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

.travis.yml

@@ -1,3 +1,5 @@
+# Copyright (c) 2017-2021 Petr Vorel <pvorel@suse.cz>
+
 dist: bionic
 language: C
 services:
@@ -30,7 +32,7 @@ matrix:
 
         # glibc (gcc/clang)
         - os: linux
-          env: DISTRO=opensuse/tumbleweed TSS=ibmtss
+          env: DISTRO=opensuse/tumbleweed TSS=ibmtss CONTAINER=podman CONTAINER_ARGS="--runtime=/usr/bin/runc --network=host"
           compiler: clang
 
         - os: linux
@@ -66,13 +68,29 @@ matrix:
           compiler: gcc
 
 before_install:
-    - df -hT
+    # Tumbleweed requires podman and newest runc due docker incompatible with glibc 2.33 (faccessat2)
+    - CONTAINER="${CONTAINER:-docker}"
+    - >
+        if [ "$CONTAINER" = "podman" ]; then
+            # podman
+            . /etc/os-release
+            sudo sh -c "echo 'deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/ /' > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list"
+            wget -nv https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable/xUbuntu_${VERSION_ID}/Release.key -O- | sudo apt-key add -
+            sudo apt update
+            sudo apt -y install podman slirp4netns
+
+            # runc
+            sudo curl -L https://github.com/opencontainers/runc/releases/download/v1.0.0-rc93/runc.amd64 -o /usr/bin/runc
+            sudo chmod +x /usr/bin/runc
+        fi
+    - $CONTAINER info
+
     - DIR="/usr/src/ima-evm-utils"
     - printf "FROM $DISTRO\nRUN mkdir -p $DIR\nWORKDIR $DIR\nCOPY . $DIR\n" > Dockerfile
     - cat Dockerfile
-    - docker build -t ima-evm-utils .
+    - $CONTAINER build $CONTAINER_ARGS -t ima-evm-utils .
 
 script:
     - INSTALL="${DISTRO%%:*}"
     - INSTALL="${INSTALL%%/*}"
-    - docker run -t ima-evm-utils /bin/sh -c "cd travis && if [ \"$VARIANT\" ]; then ARCH=\"$ARCH\" ./$INSTALL.$VARIANT.sh; fi && ARCH=\"$ARCH\" CC=\"$CC\" TSS=\"$TSS\" ./$INSTALL.sh && if [ ! \"$VARIANT\" ]; then which tpm_server || which swtpm || ../tests/install-swtpm.sh; fi && CC=\"$CC\" VARIANT=\"$VARIANT\" ../build.sh"
+    - $CONTAINER run $CONTAINER_ARGS -t ima-evm-utils /bin/sh -c "cd travis && if [ \"$VARIANT\" ]; then ARCH=\"$ARCH\" ./$INSTALL.$VARIANT.sh; fi && ARCH=\"$ARCH\" CC=\"$CC\" TSS=\"$TSS\" ./$INSTALL.sh && if [ ! \"$VARIANT\" ]; then which tpm_server || which swtpm || ../tests/install-swtpm.sh; fi && CC=\"$CC\" VARIANT=\"$VARIANT\" ../build.sh"