在ashshell变量中保留文件内容的对齐方式

编程问答 2022-06-07

问题描述

我有以下名为envoy.yaml的yaml文件

admin:
  access_log_path: /dev/stdout
  address:
    socket_address:
      address: 127.0.0.1
      port_value: 9901
static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address:
        address: 0.0.0.0
        port_value: 443
    filter_chains:
    - filters:
      - name: envoy.filters.network.http_connection_manager
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.httpconnectionManager
          stat_prefix: ingress_http
          codec_type: AUTO
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains: ["*"]
              routes:
              - match:
                  prefix: "/s1/request/get"
                  headers:
                  - name: ":method"
                    exact_match: "GET"
                route:
                  host_rewrite_literal: service1
                  cluster: internal_service1
              - match:
                  prefix: "/s1/request/post"
                  headers:
                  - name: ":method"
                    exact_match: "POST"
                route:
                  host_rewrite_literal: service1
                  cluster: internal_service1
              - match:
                  prefix: "/s2/request/get"
                  headers:
                  - name: ":method"
                    exact_match: "GET"
                route:
                  host_rewrite_literal: service2
                  cluster: internal_service2
              - match:
                  prefix: "/s2/request/post"
                  headers:
                  - name: ":method"
                    exact_match: "POST"
                route:
                  host_rewrite_literal: service2
                  cluster: internal_service2
                 
          http_filters:
          - name: envoy.filters.http.router
      transport_socket:
        name: envoy.transport_sockets.tls
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext
          require_client_certificate: true
          common_tls_context:
            tls_certificates:
              certificate_chain: 
                filename: /etc/ssl/listener/cert.pem
              private_key: 
                filename: /etc/ssl/listener/key.pem
            validation_context:
              trusted_ca:
                filename: /etc/ssl/cluster/cabundle.pem

  clusters:
  - name: internal_service1
    connect_timeout: 0.25s
    type: LOGICAL_DNS
    # Comment out the following line to test on v6 networks
    dns_lookup_family: V4_ONLY
    lb_policy: ROUND_ROBIN
    load_assignment:
      cluster_name: internal_service1
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: service1
                port_value: 443
    tls_context:
      allow_renegotiation: true
      common_tls_context:
        tls_certificates:
          certificate_chain: 
            filename: /etc/ssl/listener/cert.pem
          private_key: 
            filename: /etc/ssl/listener/key.pem
        validation_context:
          trusted_ca:
            filename: /etc/ssl/cluster/cabundle.pem
    transport_socket:
      name: envoy.transport_sockets.tls
      typed_config:
        "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext
        sni: service1
  - name: internal_service2
    connect_timeout: 0.25s
    type: LOGICAL_DNS
    # Comment out the following line to test on v6 networks
    dns_lookup_family: V4_ONLY
    lb_policy: ROUND_ROBIN
    load_assignment:
      cluster_name: internal_service2
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: service2
                port_value: 443
    tls_context:
      allow_renegotiation: true
      common_tls_context:
        tls_certificates:
          certificate_chain: 
            filename: /etc/ssl/listener/cert.pem
          private_key: 
            filename: /etc/ssl/listener/key.pem
        validation_context:
          trusted_ca:
            filename: /etc/ssl/cluster/cabundle.pem
    transport_socket:
      name: envoy.transport_sockets.tls
      typed_config:
        "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext
        sni: service2

登录ash 

> export myvar="`cat envoy.yaml`" or

> export myvar="$(cat envoy.yaml)" and
> echo $myvar

未对齐整个文件

admin: access_log_path: /dev/stdout address: socket_address: address: 127.0.0.1 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: address: 0.0.0.0 port_value: 443 filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.httpconnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: prefix: "/s1/request/get" headers: - name: ":method" exact_match: "GET" route: host_rewrite_literal: service1 cluster: internal_service1 - match: prefix: "/s1/request/post" headers: - name: ":method" exact_match: "POST" route: host_rewrite_literal: service1 cluster: internal_service1 - match: prefix: "/s2/request/get" headers: - name: ":method" exact_match: "GET" route: host_rewrite_literal: service2 cluster: internal_service2 - match: prefix: "/s2/request/post" headers: - name: ":method" exact_match: "POST" route: host_rewrite_literal: service2 cluster: internal_service2 http_filters: - name: envoy.filters.http.router transport_socket: name: envoy.transport_sockets.tls typed_config: "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext require_client_certificate: true common_tls_context: tls_certificates: certificate_chain: filename: /etc/ssl/listener/cert.pem private_key: filename: /etc/ssl/listener/key.pem validation_context: trusted_ca: filename: /etc/ssl/cluster/cabundle.pem clusters: - name: internal_service1 connect_timeout: 0.25s type: LOGICAL_DNS # Comment out the following line to test on v6 networks dns_lookup_family: V4_ONLY lb_policy: ROUND_ROBIN load_assignment: cluster_name: internal_service1 endpoints: - lb_endpoints: - endpoint: address: socket_address: address: service1 port_value: 443 tls_context: allow_renegotiation: true common_tls_context: tls_certificates: certificate_chain: filename: /etc/ssl/listener/cert.pem private_key: filename: /etc/ssl/listener/key.pem validation_context: trusted_ca: filename: /etc/ssl/cluster/cabundle.pem transport_socket: name: envoy.transport_sockets.tls typed_config: "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext sni: service1 - name: internal_service2 connect_timeout: 0.25s type: LOGICAL_DNS # Comment out the following line to test on v6 networks dns_lookup_family: V4_ONLY lb_policy: ROUND_ROBIN load_assignment: cluster_name: internal_service2 endpoints: - lb_endpoints: - endpoint: address: socket_address: address: service2 port_value: 443 tls_context: allow_renegotiation: true common_tls_context: tls_certificates: certificate_chain: filename: /etc/ssl/listener/cert.pem private_key: filename: /etc/ssl/listener/key.pem validation_context: trusted_ca: filename: /etc/ssl/cluster/cabundle.pem transport_socket: name: envoy.transport_sockets.tls typed_config: "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext sni: service2

如果要将文件内容存储在shell变量中，如何保留对齐方式？

解决方法

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