CI: use Knot DNS 2.6 instead of master

Hopefully this will make build more reliable because breakage in Knot
DNS master will not affect us. On the other hand, we must not forget to
update Knot DNS in the image!

Closes: #282

diff --git a/ci/Dockerfile b/ci/Dockerfile
index b92a3b4d8c63650ca53995186b09d9299d67787f..e670b5e5c1ea238d83758bc4e553704ecc06ff4c 100644 (file)
--- a/ci/Dockerfile
+++ b/ci/Dockerfile
@@ -27,7 +27,7 @@ RUN pip3 install -r /tmp/deckard-req.txt
 
 # build and install latest version of Knot DNS
 # (kresd depends on libknot and libdnssec)
-RUN git clone --depth=1 https://gitlab.labs.nic.cz/knot/knot-dns.git /tmp/knot
+RUN git clone --depth=1 --branch=2.6 https://gitlab.labs.nic.cz/knot/knot-dns.git /tmp/knot
 WORKDIR /tmp/knot
 RUN pwd
 RUN autoreconf -if