50 lines
1.7 KiB
Bash
Executable File
50 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -ex
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# Running K8s pods in zuul can cause a lot of issues with resolving domains
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# inside of the running pods and catching coredns in a loop. This aims to
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# tackle a few issues that have been hit to resolve this.
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NAMESERVER="1.0.0.1"
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# Grab the real nameservers instead of the local one listed in the original
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sudo ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf
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# Add the known good DNS server
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sudo sed -i "1i\nameserver $NAMESERVER\n" /etc/resolv.conf
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# Remove DNS servers pointing to localhost so coredns doesn't get caught in a loop
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sudo sed -i '/127\.0/d' /etc/resolv.conf
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# Spit out the nameservers for the logs
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cat /etc/resolv.conf
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# Running unbound server can cause issues with coredns, disabling
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if [[ -f "/etc/unbound/unbound.pid" ]]; then
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sudo kill "$(cat /etc/unbound/unbound.pid)"
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fi
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# flush iptables so coredns doesn't get caught up
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# be sure to stop docker if it is installed
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dpkg -l | grep -i docker | head -1 | if [[ "$(cut -d ' ' -f 1)" == "ii" ]]; then
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sudo systemctl stop docker
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fi
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sudo iptables --flush
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sudo iptables -tnat --flush
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dpkg -l | grep -i docker | head -1 | if [[ "$(cut -d ' ' -f 1)" == "ii" ]]; then
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sudo systemctl start docker
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fi
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