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This adds `sesdev create k3s`, which by default will deploy a master with four workers on openSUSE Tumbleweed. It will also deploy on SLE 15 SP3 if you specify `--os=sles-15-sp3`. k3s is installed by running `curl https://get.k3s.io`. Helm is also installed on the master, again using `curl`. If you don't want the latest stable k3s, you can install a specific version with the `--k3s-version` option. If you want more or less workers, use `--roles='[master],[worker],[...]`. Signed-off-by: Tim Serong <tserong@suse.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| set -ex | ||
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| zypper --non-interactive install curl | ||
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| # need this to pick up kubectl, helm etc. which are installed to /usr/local/bin | ||
| export PATH=$PATH:/usr/local/bin | ||
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| {% if k3s_version %} | ||
| export INSTALL_K3S_VERSION={{ k3s_version }} | ||
| {% endif %} | ||
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| {% if node == master %} | ||
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| # Lifted from seslib/templates/caasp/master.sh.j2 | ||
| function wait_for_master_ready { | ||
| set +ex | ||
| echo "Waiting for master to be ready" | ||
| timeout_seconds="900" | ||
| remaining_seconds="$timeout_seconds" | ||
| interval_seconds="10" | ||
| while true ; do | ||
| set -x | ||
| ACTUAL_NUMBER_OF_MASTERS="$(kubectl get nodes 2>/dev/null | egrep -c "master\s+Ready")" | ||
| set +x | ||
| echo "masters in cluster (actual/expected): $ACTUAL_NUMBER_OF_MASTERS/1 (${remaining_seconds} seconds to timeout)" | ||
| remaining_seconds="$(( remaining_seconds - interval_seconds ))" | ||
| [ "$ACTUAL_NUMBER_OF_MASTERS" = "1" ] && break | ||
| if [ "$remaining_seconds" -le "0" ] ; then | ||
| echo "It seems unlikely that a master will ever appear. Bailing out!" | ||
| set -e | ||
| false | ||
| fi | ||
| sleep "$interval_seconds" | ||
| done | ||
| set -ex | ||
| } | ||
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| # Also lifted from seslib/templates/caasp/master.sh.j2, except for the | ||
| # ACTUAL_NUMBER_O_F_WORKERS= line, which checked for "worker[0-9]+\s+Ready", | ||
| # but that won't do because the nodes are named "node[0-9]", not "worker[0-9]" | ||
| function wait_for_workers_ready { | ||
| set +ex | ||
| echo "Waiting for {{ worker_nodes }} workers to be ready" | ||
| timeout_seconds="900" | ||
| remaining_seconds="$timeout_seconds" | ||
| interval_seconds="10" | ||
| while true ; do | ||
| set -x | ||
| ACTUAL_NUMBER_OF_WORKERS="$(kubectl get nodes 2>/dev/null | egrep -c "node[0-9]+\s+Ready")" | ||
| set +x | ||
| echo "workers in cluster (actual/expected): $ACTUAL_NUMBER_OF_WORKERS/{{ worker_nodes }} (${remaining_seconds} seconds to timeout)" | ||
| remaining_seconds="$(( remaining_seconds - interval_seconds ))" | ||
| [ "$ACTUAL_NUMBER_OF_WORKERS" = "{{ worker_nodes }}" ] && break | ||
| if [ "$remaining_seconds" -le "0" ] ; then | ||
| echo "It seems unlikely that {{ worker_nodes }} workers will ever appear. Bailing out!" | ||
| set -e | ||
| false | ||
| fi | ||
| sleep "$interval_seconds" | ||
| done | ||
| set -ex | ||
| } | ||
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| curl -sfL https://get.k3s.io | K3S_KUBECONFIG_MODE="644" sh - | ||
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| # Unfortunately we can't use `kubectl wait --for=condition=Ready node/{{ master.name }} --timeout 15m` | ||
| # because this runs before the master node even exists, and so we get | ||
| # 'Error from server (NotFound): nodes "master" not found' | ||
| wait_for_master_ready | ||
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| wait_for_workers_ready | ||
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| # Helm seems generally useful, let's install it | ||
| curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash | ||
| helm version | ||
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| # This sets KUBECONFIG for everyone to the global k3s config. | ||
| # Without this, helm will try to talk to http://localhost:8080/version | ||
| # by default, which of course won't work. | ||
| echo "export KUBECONFIG=/etc/rancher/k3s/k3s.yaml" >> /etc/profile.local | ||
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| {% else %} {# node == master #} | ||
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| function get_k3s_token { | ||
| set +ex | ||
| echo "Waiting for K3S token from master" | ||
| timeout_seconds="900" | ||
| remaining_seconds="$timeout_seconds" | ||
| interval_seconds="30" | ||
| while true ; do | ||
| remaining_seconds="$(( remaining_seconds - interval_seconds ))" | ||
| if scp master:/var/lib/rancher/k3s/server/node-token /tmp/k3s_token 2>/dev/null ; then | ||
| # Got the node token, probably (when exactly does that token get created | ||
| # on the master? could we conceivably have a weird race where we get an | ||
| # empty token file here?) | ||
| break | ||
| fi | ||
| if [ "$remaining_seconds" -le "0" ] ; then | ||
| echo "It seems unlikely that a master will ever appear. Bailing out!" | ||
| set -e | ||
| false | ||
| fi | ||
| echo "waiting for k3s token (${remaining_seconds} seconds to timeout)" | ||
| sleep "$interval_seconds" | ||
| done | ||
| set -ex | ||
| } | ||
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| get_k3s_token | ||
| export K3S_TOKEN=$(cat /tmp/k3s_token) | ||
| rm /tmp/k3s_token | ||
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| curl -sfL https://get.k3s.io | K3S_URL=https://{{ master.fqdn }}:6443 sh - | ||
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| {% endif %} |
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