debian: better resolv.conf in builder containers
Add option ndots:1 to /etc/resolv.conf This fixes a few issues with DNS queries within docker containers. Normally when looking up a host name such as "debian.org", libc appends the search domains from /etc/resolv.conf to the host name, then makes a separate query for each "long" name. For example, if "search" in /etc/resolv.conf contains "domain1.org domain2.org", we make 3 queries when looking for debian.org's IP addr: - debian.org.domain1.org (fail) - debian.org.domain2.org (fail) - debian.org (success) Setting "ndots:1" makes it send the last unqualified query before the other queries with appended search domains -- for any names that contain >= 1 dot. This patch solves 2 problems: (1) In Alpine Linux (used by the "docker" pod), libc has a limitation: the domain search list can't have more than 5 entries. If it does it stops sending any more DNS queries and the last (unqualified) query never happens, so many hostname lookups fail. (2) These extra queries are not necessary a lot of the time, so this patch makes host name lookups faster TESTS =============================== - Rebuild all containers - Rebuild packages and the ISO - Make sure DNS queries work in all containers Story: 2009897 Task: 45156 Signed-off-by: Davlet Panech <davlet.panech@windriver.com> Change-Id: I7dd72b8fcc776821138c362c3aec9f4e5962a319
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@ -41,6 +41,9 @@ spec:
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resources:
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- toYaml .Values.resources | nindent 12 }}
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dnsConfig:
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{{- toYaml .Values.dnsConfig | nindent 8 }}
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volumes:
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volumes:
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- name: {{ .Values.volumes.name }}
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- name: {{ .Values.volumes.name }}
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hostPath:
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hostPath:
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@ -26,6 +26,11 @@ volumes:
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podAnnotations: {}
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podAnnotations: {}
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dnsConfig:
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options:
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- name: ndots
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value: "1"
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podSecurityContext: {}
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podSecurityContext: {}
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# fsGroup: 2000
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# fsGroup: 2000
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@ -50,6 +50,9 @@ spec:
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resources:
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- toYaml .Values.resources | nindent 12 }}
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dnsConfig:
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{{- toYaml .Values.dnsConfig | nindent 8 }}
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volumes:
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volumes:
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- name: shared-workspace
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- name: shared-workspace
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hostPath:
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hostPath:
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@ -24,6 +24,11 @@ services:
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type: ClusterIP
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type: ClusterIP
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port: 2375
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port: 2375
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dnsConfig:
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options:
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- name: ndots
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value: "1"
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insecureRegistries:
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insecureRegistries:
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# - "registry.address:port"
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# - "registry.address:port"
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@ -43,6 +43,9 @@ spec:
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resources:
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- toYaml .Values.resources | nindent 12 }}
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dnsConfig:
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{{- toYaml .Values.dnsConfig | nindent 8 }}
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volumes:
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volumes:
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- name: {{ .Values.volumes.name }}
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- name: {{ .Values.volumes.name }}
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hostPath:
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hostPath:
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@ -31,6 +31,11 @@ fullnameOverride: ""
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podAnnotations: {}
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podAnnotations: {}
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dnsConfig:
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options:
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- name: ndots
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value: "1"
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podSecurityContext: {}
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podSecurityContext: {}
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# fsGroup: 2000
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# fsGroup: 2000
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resources:
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- toYaml .Values.resources | nindent 12 }}
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dnsConfig:
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{{- toYaml .Values.dnsConfig | nindent 8 }}
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volumes:
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volumes:
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- name: {{ .Values.volumes.workspace.name }}
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- name: {{ .Values.volumes.workspace.name }}
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hostPath:
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hostPath:
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@ -41,6 +41,11 @@ fullnameOverride: ""
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podAnnotations: {}
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podAnnotations: {}
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dnsConfig:
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options:
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- name: ndots
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value: "1"
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podSecurityContext: {}
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podSecurityContext: {}
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# fsGroup: 2000
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# fsGroup: 2000
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@ -47,6 +47,9 @@ spec:
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resources:
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- toYaml .Values.resources | nindent 12 }}
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dnsConfig:
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{{- toYaml .Values.dnsConfig | nindent 8 }}
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volumes:
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volumes:
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- name: {{ .Values.volumes.name }}
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- name: {{ .Values.volumes.name }}
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configMap:
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configMap:
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podAnnotations: {}
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podAnnotations: {}
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dnsConfig:
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options:
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- name: ndots
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value: "1"
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podSecurityContext: {}
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podSecurityContext: {}
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# fsGroup: 2000
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# fsGroup: 2000
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@ -48,6 +48,9 @@ spec:
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resources:
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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{{- toYaml .Values.resources | nindent 12 }}
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dnsConfig:
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{{- toYaml .Values.dnsConfig | nindent 8 }}
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volumes:
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volumes:
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- name: {{ .Values.volumes.workspace.name }}
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- name: {{ .Values.volumes.workspace.name }}
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hostPath:
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hostPath:
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@ -50,6 +50,11 @@ fullnameOverride: ""
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podAnnotations: {}
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podAnnotations: {}
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dnsConfig:
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options:
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- name: ndots
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value: "1"
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podSecurityContext: {}
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podSecurityContext: {}
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# fsGroup: 2000
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# fsGroup: 2000
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