119 lines
3.5 KiB
YAML
119 lines
3.5 KiB
YAML
# services/hermes/node-ssh-access.yaml
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: hermes-node-ssh-access
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namespace: hermes
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labels:
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app: hermes-node-ssh-access
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---
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apiVersion: secrets-store.csi.x-k8s.io/v1
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kind: SecretProviderClass
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metadata:
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name: hermes-node-ssh-access
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namespace: hermes
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spec:
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provider: vault
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parameters:
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vaultAddress: "http://vault.vault.svc.cluster.local:8200"
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roleName: hermes-node-ssh
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objects: |
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- objectName: "node-ssh-public-key"
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secretPath: "kv/data/atlas/hermes/developer-ssh"
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secretKey: "public_key"
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filePermission: 256
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---
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apiVersion: apps/v1
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kind: DaemonSet
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metadata:
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name: hermes-node-ssh-access
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namespace: hermes
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labels:
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app: hermes-node-ssh-access
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spec:
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selector:
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matchLabels:
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app: hermes-node-ssh-access
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template:
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metadata:
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labels:
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app: hermes-node-ssh-access
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spec:
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serviceAccountName: hermes-node-ssh-access
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automountServiceAccountToken: true
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tolerations:
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- operator: Exists
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containers:
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- name: key-reconciler
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image: busybox:1.37
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imagePullPolicy: IfNotPresent
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command: [/bin/sh, -ec]
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args:
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- |
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reconcile() {
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key="$(cat /vault/secrets/node-ssh-public-key)"
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found=0
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for user in atlas oceanus; do
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home="/host-home/${user}"
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[ -d "${home}" ] || continue
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found=1
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identity="$(awk -F: -v name="${user}" '$1 == name {print $3 ":" $4; exit}' /host-etc/passwd)"
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[ -n "${identity}" ] || identity="$(stat -c %u:%g "${home}")"
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uid="${identity%%:*}"
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gid="${identity##*:}"
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install -d -m 0700 -o "${uid}" -g "${gid}" "${home}/.ssh"
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touch "${home}/.ssh/authorized_keys"
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grep -qxF "${key}" "${home}/.ssh/authorized_keys" || printf '%s\n' "${key}" >> "${home}/.ssh/authorized_keys"
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chown "${uid}:${gid}" "${home}/.ssh/authorized_keys"
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chmod 0600 "${home}/.ssh/authorized_keys"
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done
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[ "${found}" = 1 ] || { echo "no supported node SSH account found" >&2; return 1; }
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}
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while true; do
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reconcile
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sleep 300
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done
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securityContext:
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allowPrivilegeEscalation: false
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readOnlyRootFilesystem: true
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runAsUser: 0
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runAsGroup: 0
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seccompProfile:
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type: RuntimeDefault
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volumeMounts:
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- name: host-home
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mountPath: /host-home
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- name: host-passwd
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mountPath: /host-etc/passwd
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readOnly: true
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- name: vault-secrets
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mountPath: /vault/secrets
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readOnly: true
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- name: tmp
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mountPath: /tmp
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resources:
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requests:
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cpu: 5m
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memory: 8Mi
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limits:
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cpu: 50m
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memory: 32Mi
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volumes:
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- name: host-home
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hostPath:
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path: /home
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type: Directory
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- name: host-passwd
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hostPath:
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path: /etc/passwd
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type: File
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- name: vault-secrets
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csi:
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driver: secrets-store.csi.k8s.io
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readOnly: true
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volumeAttributes:
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secretProviderClass: hermes-node-ssh-access
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- name: tmp
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emptyDir:
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sizeLimit: 8Mi
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