76 lines
2.4 KiB
Bash
76 lines
2.4 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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# Aggiunge un hostname a spec.template.spec.hostAliases del Deployment cert-manager.
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#
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# Uso:
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# ./add-cert-manager-hostalias.sh <hostname>
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#
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# Esempio:
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# ./add-cert-manager-hostalias.sh main-gateway-nginx.nginx-gateway.svc.cluster.local
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# ./add-cert-manager-hostalias.sh api.internal
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DEPLOYMENT_NAME="cert-manager"
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DEPLOYMENT_NS="cert-manager"
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TARGET_IP="10.43.37.118"
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HOSTNAME_VAL="${1:-}"
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if [[ -z "$HOSTNAME_VAL" ]]; then
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echo "Uso: $0 <hostname>" >&2
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exit 1
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fi
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if ! command -v kubectl >/dev/null 2>&1; then
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echo "Errore: kubectl non trovato nel PATH" >&2
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exit 1
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fi
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if ! command -v jq >/dev/null 2>&1; then
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echo "Errore: jq non trovato nel PATH" >&2
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echo "Installa jq e riprova." >&2
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exit 1
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fi
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# Idempotenza: controlla solo il blocco hostAliases associato a TARGET_IP.
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EXISTING_HOSTNAMES="$(kubectl get deployment "$DEPLOYMENT_NAME" -n "$DEPLOYMENT_NS" -o jsonpath="{.spec.template.spec.hostAliases[?(@.ip=='${TARGET_IP}')].hostnames[*]}" 2>/dev/null || true)"
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if echo " $EXISTING_HOSTNAMES " | grep -Fq " $HOSTNAME_VAL "; then
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echo "Hostname '$HOSTNAME_VAL' gia presente per IP ${TARGET_IP} in ${DEPLOYMENT_NS}/${DEPLOYMENT_NAME}. Nessuna modifica."
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exit 0
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fi
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DEPLOY_JSON="$(kubectl get deployment "$DEPLOYMENT_NAME" -n "$DEPLOYMENT_NS" -o json)"
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UPDATED_HOST_ALIASES="$({
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echo "$DEPLOY_JSON" | jq -c --arg ip "$TARGET_IP" --arg hostname "$HOSTNAME_VAL" '
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(.spec.template.spec.hostAliases //= [])
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| if any(.spec.template.spec.hostAliases[]?; .ip == $ip) then
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.spec.template.spec.hostAliases |= map(
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if .ip == $ip then
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if ((.hostnames // []) | index($hostname)) then
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.
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else
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.hostnames = ((.hostnames // []) + [$hostname])
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end
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else
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.
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end
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)
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else
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.spec.template.spec.hostAliases += [{"ip": $ip, "hostnames": [$hostname]}]
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end
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| .spec.template.spec.hostAliases
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'
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} )"
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PATCH_PAYLOAD="$(jq -cn --argjson hostAliases "$UPDATED_HOST_ALIASES" '{spec:{template:{spec:{hostAliases:$hostAliases}}}}')"
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kubectl patch deployment "$DEPLOYMENT_NAME" \
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-n "$DEPLOYMENT_NS" \
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--type=merge \
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-p "$PATCH_PAYLOAD" >/dev/null
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echo "Hostname aggiunto con successo."
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echo " Deployment: ${DEPLOYMENT_NS}/${DEPLOYMENT_NAME}"
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echo " IP : ${TARGET_IP}"
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echo " Hostname : ${HOSTNAME_VAL}"
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