83 lines
2.5 KiB
YAML
83 lines
2.5 KiB
YAML
#cloud-config
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# Copyright 2022 Google LLC
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#
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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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# https://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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# https://hub.docker.com/r/coredns/coredns/
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# https://coredns.io/manual/toc/#installation
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# TODO: switch to the gcplogs logging driver, and set driver labels
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write_files:
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- path: /var/lib/docker/daemon.json
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permissions: 0644
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owner: root
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content: |
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{
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"live-restore": true,
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"storage-driver": "overlay2",
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"log-opts": {
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"max-size": "1024m"
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}
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}
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# disable systemd-resolved to free port 53 on the loopback interface
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- path: /etc/systemd/resolved.conf
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permissions: 0644
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owner: root
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content: |
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[Resolve]
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LLMNR=no
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DNSStubListener=no
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- path: /etc/coredns/Corefile
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permissions: 0644
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owner: root
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content: |
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${indent(6, corefile)}
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# coredns container service
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- path: /etc/systemd/system/coredns.service
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permissions: 0644
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owner: root
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content: |
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[Unit]
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Description=Start CoreDNS container
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After=gcr-online.target docker.socket
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Wants=gcr-online.target docker.socket docker-events-collector.service
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[Service]
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ExecStart=/usr/bin/docker run --rm --name=coredns \
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--log-driver=gcplogs --network host \
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-v /etc/coredns:/etc/coredns \
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coredns/coredns -conf /etc/coredns/Corefile
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ExecStop=/usr/bin/docker stop coredns
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%{ for path, data in files }
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- path: ${path}
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owner: ${lookup(data, "owner", "root")}
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permissions: ${lookup(data, "permissions", "0644")}
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content: |
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${indent(4, data.content)}
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%{ endfor }
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bootcmd:
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- systemctl start node-problem-detector
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runcmd:
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- iptables -I INPUT 1 -p tcp -m tcp --dport 8080 -m state --state NEW,ESTABLISHED -j ACCEPT
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- iptables -I INPUT 1 -p tcp -m tcp --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
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- iptables -I INPUT 1 -p udp -m udp --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
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- systemctl daemon-reload
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- systemctl restart systemd-resolved.service
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- systemctl start coredns |