Fixed GPG keyserver intermittenly failure

Workaround about issue with the particular GPG keyserver:
trying several explicit keyservers until the command succeeds

Change-Id: I7410c07e25d25006c9252b97036c3b33ca183ae6
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>

diff --git a/scripts/xds-utils/get-syncthing.sh b/scripts/xds-utils/get-syncthing.sh
index cebabbd..fabbf6b 100755 (executable)
--- a/scripts/xds-utils/get-syncthing.sh
+++ b/scripts/xds-utils/get-syncthing.sh
@@ -60,7 +60,16 @@ if [ "$?" != 0 ]; then
     exit 1
 fi
 
-${GPG} -q --keyserver pool.sks-keyservers.net --recv-keys 37C84554E7E0A261E4F76E1ED26E6ED000654A3E || exit 1
+# Workaround about issue with the particular GPG keyserver:
+# trying several explicit keyservers until the command succeeds
+# (see https://github.com/jacobalberty/unifi-docker/issues/64)
+for server in $(shuf -e ha.pool.sks-keyservers.net \
+                        hkp://p80.pool.sks-keyservers.net:80 \
+                        keyserver.ubuntu.com \
+                        hkp://keyserver.ubuntu.com:80 \
+                        pgp.mit.edu) ; do
+    ${GPG} -q --keyserver "$server" --recv-keys 37C84554E7E0A261E4F76E1ED26E6ED000654A3E && break || :
+done
 
 tarball="syncthing-${GOOS_ST}-${GOARCH}-v${SYNCTHING_VERSION}.${TB_EXT}" \
     && curl --connect-timeout 60 --retry 3 -sfSL "https://github.com/syncthing/syncthing/releases/download/v${SYNCTHING_VERSION}/${tarball}" -O \