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upstream dns-resolver

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Dominik Chilla 2020-09-23 15:35:28 +02:00
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README.md
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@ -1,6 +1,7 @@
# Snippets for k3s # Snippets for k3s
* [Install k3s](#install-k3s) * [Install k3s](#install-k3s)
* [Configure upstream DNS-resolver](#upstream-dns-resolver)
* [Namespaces and resource limits](#namespaces) * [Namespaces and resource limits](#namespaces)
* [devel](#namespace-devel) * [devel](#namespace-devel)
* [staging](#namespace-staging) * [staging](#namespace-staging)
@ -34,6 +35,19 @@ https://k3s.io/:
curl -sfL https://get.k3s.io | sh - curl -sfL https://get.k3s.io | sh -
``` ```
# Confiugure upstream DNS-resolver <a name="upstream-dns-resolver"></a>
Default: 8.8.8.8
1. local /etc/resolv.conf -> ip-of-dnsresolver (127.0.0.1 **does not work!**)
2. vi /etc/systemd/system/k3s.service:
```
[...]
ExecStart=/usr/local/bin/k3s \
server --resolv-conf /etc/resolv.conf \
```
3. Re-load systemd config: `systemctl daemon-reload`
4. Re-start k3s: `systemctl restart k3s.service`
5. Re-deploy coredns-pods: `kubectl -n kube-system delete name-of-coredns-pods`
# Namespaces and resource limits <a name="namespaces"></a> # Namespaces and resource limits <a name="namespaces"></a>
## devel <a name="namespace-devel"></a> ## devel <a name="namespace-devel"></a>
namespace-devel-limitranges.yaml: namespace-devel-limitranges.yaml:
@ -137,7 +151,7 @@ spec:
## Local provider (local - ouf-of-the-box) <a name="pv-local"></a> ## Local provider (local - ouf-of-the-box) <a name="pv-local"></a>
https://rancher.com/docs/k3s/latest/en/storage/ https://rancher.com/docs/k3s/latest/en/storage/
## Longhorn (lightweight/distributed) <a name="pv-longhorn"></a> ## Longhorn provider (lightweight/distributed) <a name="pv-longhorn"></a>
* Requirements: https://longhorn.io/docs/0.8.0/install/requirements/ * Requirements: https://longhorn.io/docs/0.8.0/install/requirements/
* Debian: `apt install open-iscsi` * Debian: `apt install open-iscsi`
* Install: https://rancher.com/docs/k3s/latest/en/storage/ * Install: https://rancher.com/docs/k3s/latest/en/storage/
@ -147,7 +161,7 @@ edit /etc/systemd/system/k3s.service:
``` ```
[...] [...]
ExecStart=/usr/local/bin/k3s \ ExecStart=/usr/local/bin/k3s \
server --disable traefik \ server --disable traefik --resolv-conf /etc/resolv.conf \
[...] [...]
``` ```
Finally `systemctl daemon-reload` and `systemctl restart k3s` Finally `systemctl daemon-reload` and `systemctl restart k3s`