journal-remote,journal-upload: added compression support (#34822)

test/units/TEST-04-JOURNAL.journal-remote.sh

@@ -97,7 +97,7 @@ rm -rf /var/log/journal/remote/*
 echo "$TEST_MESSAGE" | systemd-cat -t "$TEST_TAG"
 journalctl --sync
 
-mkdir /run/systemd/remote-pki
+mkdir -p /run/systemd/remote-pki
 cat >/run/systemd/remote-pki/ca.conf <<EOF
 [ req ]
 prompt = no
@@ -228,3 +228,47 @@ chmod -R g+rwX /run/systemd/journal-remote-tls
 systemctl restart systemd-journal-upload
 timeout 10 bash -xec 'while [[ "$(systemctl show -P ActiveState systemd-journal-upload)" != failed ]]; do sleep 1; done'
 (! systemctl status systemd-journal-upload)
+
+systemctl stop systemd-journal-upload
+systemctl stop systemd-journal-remote.{socket,service}
+rm -rf /var/log/journal/remote/*
+
+# Let's test sending data with compression enabled
+for c in none xz lz4 zstd; do
+    echo "$TEST_MESSAGE" | systemd-cat -t "$TEST_TAG"
+    journalctl --sync
+
+    cat >/run/systemd/journal-remote.conf.d/99-test.conf <<EOF
+[Remote]
+SplitMode=host
+Compression=zstd xz
+Compression=lz4
+ServerKeyFile=/run/systemd/remote-pki/server.key
+ServerCertificateFile=/run/systemd/remote-pki/server.crt
+TrustedCertificateFile=/run/systemd/remote-pki/ca.crt
+EOF
+    cat >/run/systemd/journal-upload.conf.d/99-test.conf <<EOF
+[Upload]
+URL=https://localhost:19532
+Compression=${c}:3
+ServerKeyFile=/run/systemd/remote-pki/client.key
+ServerCertificateFile=/run/systemd/remote-pki/client.crt
+TrustedCertificateFile=/run/systemd/remote-pki/ca.crt
+EOF
+    systemd-analyze cat-config systemd/journal-remote.conf
+    systemd-analyze cat-config systemd/journal-upload.conf
+
+    systemctl restart systemd-journal-remote.socket
+    systemctl restart systemd-journal-upload
+    timeout 15 bash -xec 'until systemctl -q is-active systemd-journal-remote.service; do sleep 1; done'
+    systemctl status systemd-journal-{remote,upload}
+
+    # It may take a bit until the whole journal is transferred
+    timeout 30 bash -xec "until journalctl --directory=/var/log/journal/remote --identifier='$TEST_TAG' --grep='$TEST_MESSAGE'; do sleep 1; done"
+
+    systemctl stop systemd-journal-upload
+    systemctl stop systemd-journal-remote.{socket,service}
+    rm -rf /var/log/journal/remote/*
+    rm /run/systemd/journal-upload.conf.d/99-test.conf
+    rm /run/systemd/journal-remote.conf.d/99-test.conf
+done