1使用场景
1.1gateway网关
用户浏览器访问网页时，在gateway网关配置压缩，减少传输数据，加快网页打开速度。
1.2mesh内部
微服务相互通信时，特别是用了rest协议，即用http协议通信，配置压缩和解压，可以有效加快数据传输速度，减少网路延迟
这个很有用，比如如果我们的rpc协议是http，启用压缩就可以提高传输效率。
2实操
2.1网关配置压缩
2.1.1示例1
- cat << EOF > ef-ingressgateway-http-filter-compression.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- namespace: istio-system
- name: apply-to
- spec:
- workloadSelector:
- labels:
- istio: ingressgateway
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: GATEWAY
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.compressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.compressor.v3.Compressor
- response_direction_config:
- common_config:
- min_content_length: 100
- content_type:
- - 'text/html'
- compressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.compressor.v3.Gzip
- memory_level: 3
- window_bits: 10
- compression_level: BEST_COMPRESSION
- compression_strategy: DEFAULT_STRATEGY
- EOF
- kubectl apply -f ef-ingressgateway-http-filter-compression.yaml -n istio-system
配置参数说明：
作用在http_filter上，type_url是固定的。response_direction_config对响应做配置，min_content_length最小启用压缩大小，content_type对哪些类型启用压缩。compressor_library压缩库配置，
window_bits：
窗口位大小，值从9到15，大的值会有更好的压缩，但内存消耗更大，默认是12，将产生4096字节窗口
compression_level
压缩级别，将影响压缩速度和压缩大小。BEST,高压缩，高延迟;SPEED低压缩，低延迟;DEFAULT优化的压缩，将介于BEST和SPEED之间。默认没设置是DEFAULT.
memory_level
内存级别，从1到9，控制压缩库内存的使用量，值越高内存用的多，但是更快，压缩结果更好。默认值是5.
compression_strategy:
DEFAULT , FILTERED , HUFFMAN , RLE
content_type:
默认值 “application/javascript”, “application/json”, “application/xhtml+xml”, “image/svg+xml”, “text/css”, “text/html”, “text/plain”, “text/xml”
没启用压缩前：
传输大小是4.6k
启用压缩后：
content-encoding为gzip，说明启用了gzip压缩
大小由4.6k降到了1.9k
2.1.2提高压缩参数
- cat << EOF > ef-ingressgateway-http-filter-compression-2.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- namespace: istio-system
- name: apply-to
- spec:
- workloadSelector:
- labels:
- istio: ingressgateway
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: GATEWAY
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.compressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.compressor.v3.Compressor
- response_direction_config:
- common_config:
- min_content_length: 100
- content_type:
- - 'text/html'
- compressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.compressor.v3.Gzip
- memory_level: 9
- window_bits: 15
- compression_level: BEST_COMPRESSION
- compression_strategy: DEFAULT_STRATEGY
- EOF
- kubectl apply -f ef-ingressgateway-http-filter-compression-2.yaml -n istio-system
提高参数后传输数据从1.9k下降到1.8k
2.1.3最快压缩速度
- cat << EOF > ef-ingressgateway-http-filter-compression-3.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- namespace: istio-system
- name: apply-to
- spec:
- workloadSelector:
- labels:
- istio: ingressgateway
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: GATEWAY
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.compressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.compressor.v3.Compressor
- response_direction_config:
- common_config:
- min_content_length: 100
- content_type:
- - 'text/html'
- compressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.compressor.v3.Gzip
- memory_level: 9
- window_bits: 15
- compression_level: BEST_SPEED
- compression_strategy: DEFAULT_STRATEGY
- EOF
- kubectl apply -f ef-ingressgateway-http-filter-compression-3.yaml -n istio-system
BEST_SPEED传输大小从1.8k提升到1.9k
2.1.4请求启用压缩
- cat << EOF > ef-ingressgateway-http-filter-compression-4.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- namespace: istio-system
- name: apply-to
- spec:
- workloadSelector:
- labels:
- istio: ingressgateway
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: GATEWAY
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.compressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.compressor.v3.Compressor
- response_direction_config:
- common_config:
- min_content_length: 100
- content_type:
- - 'text/html'
- request_direction_config:
- common_config:
- enabled:
- default_value: true
- runtime_key: request_compressor_enabled
- compressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.compressor.v3.Gzip
- memory_level: 9
- window_bits: 15
- compression_level: BEST_SPEED
- compression_strategy: DEFAULT_STRATEGY
- EOF
- kubectl apply -f ef-ingressgateway-http-filter-compression-4.yaml -n istio-system
request_direction_config配置请求压缩
2.1.5禁用响应压缩，只用请求压缩
- cat << EOF > ef-ingressgateway-http-filter-compression-5.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- namespace: istio-system
- name: apply-to
- spec:
- workloadSelector:
- labels:
- istio: ingressgateway
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: GATEWAY
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.compressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.compressor.v3.Compressor
- response_direction_config:
- common_config:
- enabled:
- default_value: false
- runtime_key: response_compressor_enabled
- min_content_length: 100
- content_type:
- - 'text/html'
- request_direction_config:
- common_config:
- enabled:
- default_value: true
- runtime_key: request_compressor_enabled
- compressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.compressor.v3.Gzip
- memory_level: 9
- window_bits: 15
- compression_level: BEST_SPEED
- compression_strategy: DEFAULT_STRATEGY
- EOF
- kubectl apply -f ef-ingressgateway-http-filter-compression-5.yaml -n istio-system
2.2mesh内部配置压缩
reviews，ratings之间启用压缩
- cat << EOF > ef-ratings-http-filter-compression.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- name: ratings
- spec:
- workloadSelector:
- labels:
- app: ratings
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: SIDECAR_INBOUND
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.compressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.compressor.v3.Compressor
- response_direction_config:
- common_config:
- enabled:
- default_value: true
- runtime_key: response_compressor_enabled
- min_content_length: 10
- content_type:
- - 'application/json'
- request_direction_config:
- common_config:
- enabled:
- default_value: true
- runtime_key: request_compressor_enabled
- compressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.compressor.v3.Gzip
- memory_level: 9
- window_bits: 12
- compression_level: BEST_SPEED
- compression_strategy: DEFAULT_STRATEGY
- EOF
- kubectl apply -f ef-ratings-http-filter-compression.yaml -n istio
raings启用了压缩
reviews启用解压缩
- cat << EOF > ef-reviews-http-filter-compression.yaml
- apiVersion: networking.istio.io/v1alpha3
- kind: EnvoyFilter
- metadata:
- name: reviews
- spec:
- workloadSelector:
- labels:
- app: reviews
- configPatches:
- - applyTo: HTTP_FILTER
- match:
- context: SIDECAR_OUTBOUND
- listener:
- filterChain:
- filter:
- name: envoy.filters.network.http_connection_manager
- subFilter:
- name: envoy.filters.http.router
- patch:
- operation: INSERT_BEFORE
- value:
- name: envoy.filters.http.decompressor
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.filters.http.decompressor.v3.Decompressor
- response_direction_config:
- common_config:
- enabled:
- default_value: true
- runtime_key: response_decompressor_enabled
- request_direction_config:
- common_config:
- enabled:
- default_value: false
- runtime_key: request_decompressor_enabled
- decompressor_library:
- name: text_optimized
- typed_config:
- "@type": type.googleapis.com/envoy.extensions.compression.gzip.decompressor.v3.Gzip
- chunk_size: 4096
- window_bits: 15
- EOF
- kubectl apply -f ef-reviews-http-filter-compression.yaml -n istio
- window_bits
窗口位大小，值从9到15，解压的窗口位大小需要大于等于压缩的窗口位大小。默认值是15
- chunk_size
块大小，用于输出缓存，默认值是4096
value must be inside range [4096, 65536]
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